200,318 research outputs found
Field Testing of a PEM Fuel Cell in an Integrated Power System
No full textFor the past 12 years, the Schatz Energy Research Center (SERC) has operated the Schatz Solar Hydrogen Project (SSHP). SSHP is a stand-alone renewable energy system that uses hydrogen as the energy storage medium and a proton exchange membrane (PEM) fuel cell as the regeneration technology [1,2]. Recently, a new 36-cell, 140 cm2 PEM fuel cell was installed at SSHP. We report operating results, cell voltage decay rates, and general utility of the fuel cell in providing power in this integrated system.Presented at the 2002 Fuel Cell Seminar, Palm Springs, CA, November 2002Technical Reportapplication/pd
Evangelische Schatz-Kam[m]er
No full textEVANGELISCHE SCHATZ-KAM[M]ER
Evangelische Schatz-Kam[m]er (-)
Evangelische Schatz-Kam[m]er ([Theil 1]) ([1])
Titelseite ([1])
Widmung ([2])
Zuschrifft. ([2])
Vorrede ([9])
Erste Predigt. (1)
Andere Predigt (12)
Erste Predigt Am II. Sontag des Advents ... (23)
Andere Predigt Am II. Sontag des Advents ... (37)
Erste Predigt Auf den III. Sontag des Advents ... (53)
Am III. Sontag des Advents/ Andere Predigt ... [unvollständig] (66)
Fotodokumentation ( -
Hibiscus ankeranensis M. Hanes & G. E. Schatz 2020, sp. nov.
No full textHibiscus ankeranensis M. Hanes & G.E. Schatz, sp. nov. (Fig. 3B, 4B). Holotypus: MADAGASCAR. Reg. Atsinanana [Prov. Toamasina]: Dist. Brickaville, Com. Maroseranana, Fkt. Ambodilendemy, Andrangato river, Ankerana, 18°26'52"S 48°46'28"E, 346 m, 13.III.2011, fl., Antilahimena 7544 (MO-2652132!; iso-: P [P06774026]!, TAN). Hibiscus ankeranensis M. Hanes & G.E. Schatz differs from H. calyculatus (Hochr.) M. Hanes, G.E. Schatz & Callm. by its epicalyces, 5 non-symmetrical, succulent in vivo lobes (vs. 4 small, reflexed lobes), calyx color, green (vs. red), and its nonreflexed petals. Tree c. 6 m tall, 12 cm dbh; twigs moderately densely covered with light, golden, semi-erect, simple, fascicled and stellate trichomes. Leaves 3.5– 9.8 × 1.9 –3.9 cm, elliptic to narrowly obovate, the base acute to obtuse, apex acuminate, the acumen to 1.2 cm, sometimes folded to one side, the tip rounded, glabrous and verruculose above, very sparsely covered with golden, stellate trichomes below, venation weakly brochidodromous with 7–10 secondary veins per side, with occasional intersecondary veins, midvein raised above and below, secondary veins slightly raised above and below, tertiary venation finely reticulate, slightly raised above and below; petiole 3–5 mm, 0.7–1 mm in diam., moderately densely covered with semi-appressed, curly light golden trichomes. Flowers solitary, axillary, pendent; pedicels 7–15 mm long, 0.2–0.7 mm in diam., densely covered with golden erect, simple and fasciculate trichomes; epicalyx with 5 free lobes, appearing somewhat succulent in vivo, the lobes 9 × 5 – 7 mm, ovate, the apex acute, sparsely covered with golden stellate trichomes on the outside, glabrous very sparsely covered with golden simple and stellate trichomes inside; calyx tubular with 4(–5?) lobes, fused for 5–7 mm, the lobes 2.5 × 2.5 mm, triangular, the apex triangular, moderately densely covered with golden stellate trichomes outside and inside; petals 5, 24 × 13 mm, obovate, the apex rounded to emarginate, red, sparsely covered with very light golden stellate trichomes outside, glabrous inside with evident venation; staminal column 20 mm long, 0.8 mm in diam., pinkish red, glabrous with very scattered minute trichomes; stamens 30–40(–50), filaments 8–10 mm, red, anthers 0.8 × 0.4 mm; styles 5, 8 mm, red, moderately densely covered with white trichomes, stigma c. 0.7 mm in diam., urceolate. Fruit unknown. Distribution and ecology. – Hibiscus ankeranensis is known only from a single collection near the Andrangato river at Ankerana in the eastern coast of Madagascar at c. 350 m in elevation in lowland moist evergreen forests (Fig. 2). [A: Ratovoson 2092; B: Antilahimena 7544; C: Razafitsalama 1409] [Photos: A: F. Ratovoson; B: P. Antilahimena; C: C. Birkinshaw] Conservation status. – Hibiscus ankeranensis is known only from a single collection from the newly designated Corridor Ankeniheny-Zahamena protected area. We lack information on population size but lowland moist evergreen forests (below 800 m) are fragmented and heavily deforested in the region (GAUTIER, 2018). Recent satellite imagery from Google earth [https://www.google.com/intl/en/earth] suggests that the collection site and the surrounding area is deforested or disturbed. Hibiscus ankeranensis is therefore assessed as “Critically Endangered” [CR B 2ab(iii)] using IUCN Red List Categories and Criteria (IUCN, 2012). Notes. – Hibiscus ankeranensis is similar to H. calyculatus in corolla color but differs by its epicalyces with 5 lobes, 9 mm long (vs. 4(–5) lobes, reflexed, 3–4 mm long), calyx with 4(–5) teeth, green, succulent in vivo (vs. 5 teeth, red, inflated) and petals not reflexed (vs. reflexed).Published as part of Hanes, Margaret M., Schatz, George E. & Callmander, Martin W., 2020, Transfer of the Malagasy genera Humbertianthus and Macrostelia to Hibiscus (Malvaceae) with description of four new species, pp. 193-202 in Candollea 75 (2) on pages 200-201, DOI: 10.15553/c2020v752a4, http://zenodo.org/record/568374
Hibiscus analalavensis M. Hanes & G. E. Schatz 2020, sp. nov.
No full textHibiscus analalavensis M. Hanes & G.E. Schatz, sp. nov. (Fig. 3A, 4A). Holotypus: MADAGASCAR. Reg. Atsinanana [Prov. Toamasina]: Analalava NP, 17°42'S 49°26'E, 16.XI.2007, fl., Andriamiarinoro 102 (MO-6562524!; iso-: P [P00847913]!, TAN). Hibiscus analalavensis M. Hanes & G.E. Schatz differs from H. vohipahensis M. Hanes & G.E. Schatz in having shorter petioles, 4–5 mm (vs. 6–10 mm), and shorter pedicels, 30–32 mm (vs. 45 mm). Shrub to small tree 3–5 m tall, 3–4 cm dbh; twigs moderately densely covered with golden stellate trichomes. Leaves 7.3–11.9 × 3.3–5.1 cm, narrowly obovate, the base cuneate and abruptly attenuate, the margin strongly revolute, the apex rounded to obtuse or slightly retuse, glabrous above, nearly completely glabrous below, venation brochidodromous with 6–7 secondary veins per side, midvein raised above and below, secondary veins slightly raised above and below, tertiary venation reticulate, slightly raised above and below; petiole 4 – 5 mm, c. 1 mm in diam., moderately densely covered with stellate trichomes. Flowers solitary, axillary, pendent; pedicels 30 –32 mm long, 1.4 mm in diam., densely covered with reddish-gold, erect simple, fasciculate and stellate trichomes; epicalyx with 5 lobes fused at the base for 2 mm, the lobes 15 × 6– 9 mm, broadly ovate, the apex acute, densely covered with rufous golden stellate trichomes on the outside, densely covered with golden appressed simple and fasciculate trichomes inside; calyx with 5 lobes, fused at the base for 6–9 mm (c. half of length), the lobes 20 × 18 mm, triangular, the apex triangular, very densely covered with golden stellate trichomes outside, very densely covered with appressed curly white trichomes inside; petals 5, 50 × 35– 37 mm, obovate, the apex rounded, white with a peach blush, meanwhile they turn from pink to white with age, densely covered with light golden stellate trichomes outside, glabrous inside with evident venation; staminal column c. 30 mm long, c. 2 mm in diam., white, glabrous, with a tuft of dense, golden, erect, simple trichomes at the apex; stamens c. 70, filaments 10 mm long, white, anthers c. 1.5 × 1.5 mm; styles 5, c. 16 mm long, white, slender, moderately densely covered with white, erect, simple and fasciculate trichomes, stigma c. 0.5 × 0.8 mm, bulbous. Fruit unknown. Vernacular names. – “Afopotsy” (Lehavana 426). Distribution and ecology. – Hibiscus analalavensis occurs in the lowland moist evergreen forest of Analalava near Foulpointe from 40 to 90 m in elevation. Conservation status. – Hibiscus analalavensis is known from 4 locations within the protected area of Analalava. Despite the very restricted extent of occurrence (EOO) (c. 1 km ²), there appear to be no current threats to H. analalavensis. Thus, the species is assigned a status of “Least Concern” [LC] using IUCN Red List Categories and Criteria (IUCN, 2012), with the caution that this status is highly dependent on continued effective protection. Notes. – Hibiscus analalavensis resembles H. vohipahensis in that they have whitish flowers but differs from the latter species by having shorter petioles, 4–5 mm (vs. 6–10 mm), shorter pedicels, 30–32 mm (vs. 45 mm), and smaller petals, 15 × 6–9 mm (vs. 12–17 × 12–18 mm). Paratypi. – MADAGASCAR. Reg. Atsinanana [Prov. Toamasina]: Foulpointe, Morarano, forêt d’Analalava, à 7 km SW de Foulpointe, 17°42'05"S 49°27'31"E, 87 m, 12.II.2007, fl., Lehavana 426 (MO, P, TAN); ibid. loco, 17°42'14"S 49°27'19"E, 40 m, 25.XI.2015, fl., Ratovoson 2092 (MO, P, TAN); ibid. loco, 19.XII.1967, fl., Service Forestier 28071 (P).Published as part of Hanes, Margaret M., Schatz, George E. & Callmander, Martin W., 2020, Transfer of the Malagasy genera Humbertianthus and Macrostelia to Hibiscus (Malvaceae) with description of four new species, pp. 193-202 in Candollea 75 (2) on pages 198-200, DOI: 10.15553/c2020v752a4, http://zenodo.org/record/568374
Hibiscus involucratus M. Hanes, G. E. Schatz & Callm. 2020, comb. nov.
No full textHibiscus involucratus (Hochr.) M. Hanes, G.E. Schatz & Callm., comb. nov. Macrostelia involucrata Hochr. in Notul. Syst. (Paris) 14: 230. 1952. Holotypus: MADAGASCAR. Reg. Atsimo-Atsinanana [Prov. Fianarantsoa]: Vondrozo, [22°49'S 47 °19'E], 11.IX.1926, fl., Decary 5257 (P [P00037126]!; iso-: G [G00014442]!, P [P00365083, P00037127]!, TEF). Distribution and ecology. – Hibiscus involucratus is known from the low elevation tropical evergreen forests around Vondrozo at c. 450 m elevation (Fig. 2). Conservation status. – Hibiscus involucratus is known only from a single location near Vondrozo, collected in 1926. It is possible that the collection has been made in what is now known as the Ambositra-Vondrozo protected area. With a single collection in the low elevation moist evergreen forests, which are highly threatened in Madagascar, this species is assigned a conservation status of “Critically Endangered” [CR B2ab(iii)] using the IUCN Red List Categories and Criteria (IUCN, 2012). Notes. – Hibiscus involucratus can be distinguished from all other pendent Hibiscus in Madagascar by its tubular epicalyx with 6 irregular teeth that completely hides the calyx. We consider the sheet [P00037126] as the holotype, as it is the only specimen with Hochreutiner’s handwriting in P.Published as part of Hanes, Margaret M., Schatz, George E. & Callmander, Martin W., 2020, Transfer of the Malagasy genera Humbertianthus and Macrostelia to Hibiscus (Malvaceae) with description of four new species, pp. 193-202 in Candollea 75 (2) on page 196, DOI: 10.15553/c2020v752a4, http://zenodo.org/record/568374
[Der Schatz durch den Schatz]
No full textDas Ehepaar mit seinen vier KindernJ. M. Usteri del. ; H. Lips sculp.Auf Unterlagenblatt handschriftliche Notiz "Der Schatz durch den Schatz / Alruna 1812"Auf Unterlagenblatt Nummerierung nach Lips' Inventarisierung übernommen: Nr. 1330, Album I
Hibiscus benedicti Callm., G. E. Schatz & M. Hanes 2020, nom. nov.
No full textHibiscus benedicti Callm., G.E. Schatz & M. Hanes, nom. nov. ≡ Macrostelia involucrata Hochr. in Notul. Syst. (Paris) 14: 230. 1952. ≡ Hibiscus involucratus (Hochr.) M. Hanes, G.E. Schatz & Callm. in Candollea 75: 196. 2020 [nom. illeg., non Salisb. 1796]. Holotypus: MADAGASCAR. Reg. Atsimo-Atsinanana [Prov. Fianarantsoa]: Vondrozo, [22°49'S 47 °19'E], 11.IX.1926, fl., Decary 5257 (P [P00037126]!; iso-: G [G00014442]!, P [P00365083, P00037127]!, TEF). Etymology. – The specific epithet honors Bénédict Pierre Georges Hochreutiner (1873 – 1959), who described the genus Macrostelia, now considered as a synonym of Hibiscus (HOCHREUTINER, 1952). Hochreutiner was a Swiss botanist and theologian, director of the Conservatoire et Jardin botaniques in Geneva from 1931 to 1943. He described more than 550 taxa and made some 150 new combinations within 60 plant families, but mainly in the Malvaceae, which he treated for the Flore de Madagascar et des Comores (HOCHREUTINER, 1955). Notes. – In his Prodromus stirpium, SALISBURY (1796) provided his own specific epithet (nomen triviale in Linnaeus’ vocabulary) for many species that had already been named by Linnaeus or other previous botanists, thus creating hundreds of superfluous and illegitimate names. Salisbury renamed Hibiscus surattensis L. as H. involucratus Salisb., which is clearly superfluous and illegitimate under ICN Art. 52.1 and 52.2 (TURLAND et al., 2018), but nevertheless validly published, and thus blocks the epithet involucratus in Hibiscus.Published as part of Callmander, Martin W., Schatz, George E., Gereau, Roy E. & Hanes, Margaret M., 2020, A new name in Hibiscus (Malvaceae) for Madagascar, pp. 323-324 in Candollea 75 (2) on page 324, DOI: 10.15553/c2020v752a14, http://zenodo.org/record/572491
Hibiscus calyculatus M. Hanes, G. E. Schatz & Callm. 2020, comb. nov.
No full textHibiscus calyculatus (Hochr.) M. Hanes, G.E. Schatz & Callm., comb. nov. (Fig. 1A). Macrostelia calyculata Hochr. in Notul. Syst. (Paris) 14: 232. 1952. Holotypus: MADAGASCAR. Reg. Haute Matsiatra [Prov. Fianarantsoa]: vallée Ampamaherana, [21°19'S 47°19'E], [1300 m], 25.V.1949, fl., Service Forestier 2046 (P [P00037125]!; iso-: G [G00014441]!, TEF). Vernacular name. – “Tsilaitra” (Service Forestier 2046, 14420). Distribution and ecology. – Hibiscus calyculatus grows in medium elevation moist evergreen forests east of Fianarantsoa, in the massif of Andrambovato, in the Ampamaherana valley and near Kianjavato (D. Scherberich, pers. comm.) from 1155–1300 m in elevation (Fig. 2). Conservation status. – Hibiscus calyculatus is known from 3 locations all encompassed in the Protected Area Network (Corridor Forestier Ambositra-Vondrozo and Ranofanana). Despite the very restricted Extent of Occurrence (EOO) of 12 km ² and an Area of Occupancy (AOO) of 8 km ², there appear to be no current threats to H. calyculatus. Thus, the species is assigned a conservation status of “Least Concern” [LC] using the IUCN Red List Categories and Criteria (IUCN, 2012), with the caution that this status is highly dependent on continued effective protection. [B: Rasoandriana 89; C: J. Razanatsoa 644] [Photos: A: D. Scherberich; B: P. Antilahimena; C: B. Mashburn] Notes. – Hibiscus calyculatus is distinguished from all other pendent Hibiscus on Madagascar by its four small (3–4 mm), free, reflexed epicalyx bracts and a distinctive red, tubular calyx. Additional specimens examined. – MADAGASCAR. Reg. Vatovavy-Fitovinany [Prov. Fianarantsoa]: Massif d’Andrambovato, Tolongoina, Ikongo, 21°30'58"S 47°25'36"E, 1155 m, 28.V.1998, fl., Razafimandimbison 335 (G, MO, P, TAN, TEX); Fort Carnot, Andrambovato Station Forestier, Parcelle A-16, [21°31'S 47°25'E], 28.VII.1954, fl., Service Forestier 14420 (P, TEF).Published as part of Hanes, Margaret M., Schatz, George E. & Callmander, Martin W., 2020, Transfer of the Malagasy genera Humbertianthus and Macrostelia to Hibiscus (Malvaceae) with description of four new species, pp. 193-202 in Candollea 75 (2) on pages 194-196, DOI: 10.15553/c2020v752a4, http://zenodo.org/record/568374
Hibiscus vohipahensis M. Hanes & G. E. Schatz. Each 2020, sp. nov.
No full textHibiscus vohipahensis M. Hanes & G.E. Schatz, sp. nov. (Fig. 3C, 4C). Holotypus: MADAGASCAR. Reg. Atsimo-Atsinanana [Prov. Fianarantsoa]: Vangaindrano, Vohipaho, Ankara Bolava Forest, 23°31'34"S 47°30'01"E, 27 m, 26.VIII.2008, fl., Bussmann 15177 (MO-6152851!; iso-: G [G00341945]!, P, TAN). Hibiscus vohipahensis M. Hanes & G.E. Schatz differs from H. analalavensis M. Hanes & G.E. Schatz in having longer petioles and pedicels, large pure white petals that are widest at the apex with filaments about twice as long as the long staminal column. Tree 3–6 m tall, 6 cm dbh; twigs covered with light golden stellate trichomes. Leaves 7.8– 13.7 × 2.9– 4.5 cm, narrowly obovate, the base acute, the margin strongly revolute, the apex acuminate, glabrous above, nearly glabrous below with the occasional stellate trichome below, venation brochidodromous with 8–10 secondary veins per side, midvein raised above and below, secondary veins slightly raised above and below, tertiary venation reticulate, slightly raised above and below; petiole 6–10 mm, 1 mm in diam., covered with stellate trichomes. Flowers solitary, axillary, pendent; pedicels 45 mm, 1.2 mm in diam., densely covered with golden, erect, simple, fasciculate and stellate trichomes; epicalyx with 5 lobes fused at the base for 2 mm, the lobes 12–17 × 12–18 mm, broadly ovate, the apex acute to obtuse, densely covered with golden stellate trichomes on the outside, densely covered with light golden, erect simple and fasciculate trichomes inside; calyx with 5 lobes, fused at the base for 12 mm (about half of length), the lobes 20 × 18 mm, ovate, the apex acute, densely covered with golden stellate trichomes outside, densely covered with appressed curly beige trichomes inside; petals 5, c. 55 mm, obovate, the apex rounded, white, widest at apex, turning reddish with age, densely covered with light golden stellate trichomes outside, glabrous inside with evident venation; staminal column 50 mm long, 2 mm in diam., white, glabrous, with a tuft of dense golden erect simple trichomes at the apex; stamens c. 70, filaments 20 mm, white, anthers 1.5 × 2 mm; styles 5, 25 mm, white, slender, delicate, covered with white erect simple and fasciculate trichomes, stigma c. 1.7 mm, bulbous. Fruit unknown. Vernacular name. – “Hafatra-rora” (Birkinshaw 2040). Distribution and ecology. – Hibiscus vohipahensis has the most southern distribution of all species discussed here and is known from two protected patches of lowland moist evergreen forests near Vangaindrano from 10 to 135 m elevation. Conservation status. – Hibiscus vohipahensis is known from 6 locations from two protected areas (Agnakatrika and Ankarabolava). Despite the very restricted extent of occurrence (EOO) and area of occupancy (AOO) of c. 9 km ², there appear to be no current threats to H. vohipahensis. Thus, the species is assigned a status of “Least Concern” [LC] IUCN Red List Categories and Criteria (IUCN, 2012), with the caution that this status is highly dependent on continued effective protection. Notes. – Hibiscus vohipahensis differs from H. analalavensis in having longer petioles, 6 – 10 mm (vs. 4– 5 mm), longer pedicels, 45 mm (vs. 30–32 mm), and wider petals, 12–18 mm (vs. 6–9 mm) that are pure white (vs. white to pink blush) that are widest at the apex (vs. widest in the middle of the petal). The staminal column in H. vohipahensis is also longer than that in H. analalavensis, 50 mm (vs. 30 mm) with filaments about twice as long, 20 mm (vs. 10 mm). Paratypi. – MADAGASCAR. Reg. Atsimo-Atsinanana [Prov. Fianarantsoa]: Vangaindrano, Vohipaho, forêt d’Ankarabolava, 23°31'51"S 47°29'48"E, 72 m, 17.IX.2009, fl., Andriamihajarivo 1679 (MO, P, TAN, TEF); ibid. loco, 23°31'32"S 47°30'12"E, 13 m, 29.V.2014, bud, fl., Birkinshaw 2040 (MO, P, TAN); Marofototra, NAP Ankarabolava-Agnakatrika, 23°30'24"S 47°30'51"E, 65 m, 5.VII.2010, fl., Randrianarivony 164 (MO, P, TAN); c. 5 km au SE du village Sahavia, 23°26'21"S 47°30'34"E, 135 m, 19.X.2010, fl., Razafitsalama 1409 (MO, P, TAN); forêt de Vohipaho, 23°26'34"S 47°30'50"E, 80 m, 22.IX.2009, bud, Razanatsima 780 (MO, P, TAN).Published as part of Hanes, Margaret M., Schatz, George E. & Callmander, Martin W., 2020, Transfer of the Malagasy genera Humbertianthus and Macrostelia to Hibiscus (Malvaceae) with description of four new species, pp. 193-202 in Candollea 75 (2) on pages 201-202, DOI: 10.15553/c2020v752a4, http://zenodo.org/record/568374
Hibiscus ambanitazensis M. Hanes & G. E. Schatz 2020, sp. nov.
No full text<p> <i>Hibiscus ambanitazensis</i> M. Hanes & G.E. Schatz, <b>sp. nov.</b> (Fig. 1C).</p> <p> <b>Holotypus: MADAGASCAR. Reg. Antsiranana [Prov. SAVA]:</b> Com. Ampahana, Fkt. Andrapengy, Ambanitaza, 14°41'02"S 50°11'14"E, 9.XII.2015, fl., <i>Razanatsoa</i>, <i>Bernard & Mashburn</i> 644 (MO-6710358!; iso-: P, TAN).</p> <p> <i>Hibiscus ambanitazensis M. Hanes & G.E. Schatz is distinct from all other reddish, pendent flowered Hibiscus from the east coast of Madagascar in its petal pigmentation (purple red), and the combination of a long pedicel (up to 42 mm), epicalyx bracts with 6 lobes (fused at the base), and calyx fused to at least half of length (fused for 7–11 mm).</i></p> <p> <i>Shrub</i> c. 3.5 m tall, sparsely branched; twigs covered with golden, semi-erect, simple, fascicled and stellate trichomes. <i>Leaves</i> 5.5–9.8 × 2.8–4.6 cm, elliptic to narrowly obovate, the base acute to obtuse, apex acuminate, the acumen to 0.8 cm long, the tip rounded, glabrous above, very sparsely covered with golden stellate trichomes below, venation weakly brochidodromous with 8–10 secondary veins per side, midvein raised above and below, secondary veins slightly raised above and below, tertiary venation finely reticulate, slightly raised above and below; petiole 8–11 mm, c. 0.8 mm in diam., moderately densely covered with semi-appressed, curly, light golden trichomes and occasional light golden stellate trichomes. <i>Flowers</i> solitary, axillary, pendent; pedicels 40–42 mm long, c. 0.8 mm in diam., densely covered with golden, erect, simple, fasciculate, and stellate trichomes; epicalyx with 6 lobes fused at the base for 3–4 mm of its length, the lobes 6 × 2.5–4 mm, ovate, the apex acute, densely covered with golden stellate trichomes on the outside, densely covered with golden appressed simple trichomes inside; calyx with 5 lobes, fused at the base for 7– 11 mm, the lobes c. 15 × 10 mm, ovate to triangular, the apex narrowly triangular, very densely covered with golden stellate trichomes outside and inside; petals 5, 30 × 14 mm, obovate, the apex rounded, purple-red, strongly reflexed, densely covered with white stellate trichomes outside, glabrous and verrucose inside with visible venation; staminal column c. 21 mm long, c. 1.8 mm in diam., red, sparsely to moderately densely covered with light golden stellate trichomes, with a tuft of dense golden erect simple trichomes at the apex; stamens c. 70, filaments 8–10 mm long, red, anthers c. 1.3 × 1.3 mm; styles 5, 12 – 15 mm long, white, sparsely covered with white trichomes, stigma c. 0.8 mm in diam., urceolate. <i>Fruit</i> unknown.</p> <p> <i>Distribution and ecology. – Hibiscus ambanitazensis</i> is known from one collection in a forest fragment on volcanic soil (“table basaltique”) (Fig. 2).</p> <p> <i>Conservation status. – Hibiscus ambanitazensis</i> is known only by a single location outside of the Protected Area Network in a small patch of forest north of Antalaha in close proximity to recent slash and burn activity. The “table basaltique” along the east coast of Masoala to north of Antalaha are highly threatened because their rich volcanic soils are highly suitable for agriculture. The new species is assigned a conservation status of “Critically Endangered” [CR B2ab(iii)] using the IUCN Red List Categories and Criteria (IUCN, 2012).</p> <p> <i>Notes</i>. – The new species differs from all other reddish, pendent flowered <i>Hibiscus</i> from the east coast of Madagascar in its petal pigmentation, purple red (vs. red). Epicalyx, calyx and style color further distinguish <i>H</i>. <i>ambanitazensis</i> from <i>H</i>. <i>ankeranensis</i>, <i>H. calyculatus</i> and <i>H. laurinusus</i> (see Table 1).</p>Published as part of <i>Hanes, Margaret M., Schatz, George E. & Callmander, Martin W., 2020, Transfer of the Malagasy genera Humbertianthus and Macrostelia to Hibiscus (Malvaceae) with description of four new species, pp. 193-202 in Candollea 75 (2)</i> on pages 197-198, DOI: 10.15553/c2020v752a4, <a href="http://zenodo.org/record/5683749">http://zenodo.org/record/5683749</a>
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