1,721,263 research outputs found
Zur epiphytischen Flechtenflora und -vegetation des Siebengebirges und ihren Veränderungen seit 1959
No full textDorothee Killmann und Maximilian Boecke
Bemerkenswerte Flechtenfunde aus Rheinland-Pfalz und Luxemburg
No full textDorothee Killmann & Eberhard Fische
Neoschumannia gishwatiensis Eb. Fischer, Killmann & Meve 2013, sp. nov.
No full textNeoschumannia gishwatiensis Eb.Fischer, Killmann & Meve, sp. nov. (Figs. 1 & 2) Ab omnibus speciebus Neoschumanniae adhuc cognitis gemmis obovatis, corolla lobis ellipticis, emeraldis, nitidis, corona gynostegiali partibus extendibus basali discoidis conjunctis differt. Type:— RWANDA. Northern Province: Gishwati Forest Reserve, 29°21’22”E, 1°49’36”S, 2170 m, 2 October 2009, Fischer 13225 (holotype K!; isotype KOBL!). Lianas, climbing up to 5 m high, with above-ground runners up to 2 m long. Latex colorless, roots fibrous. Stems twining when support available, 4–5 mm diam, green, glabrous. Petiole up to 2.3 cm long, adaxially channelled; blades elliptic, 9–11 × 5–7 cm, herbaceous to subcoriaceous, basally rounded, acuminate at apex, green, concolor (abaxial side of leaf slightly paler than adaxial side), glabrous, base of lamina adaxially with 2 colleters, stipules reduced or minute, 0.8–1 mm long, glands ovoid. Inflorescences extra-axillary, solitary, many-flowered with 1–2 flowers open at time, pseudo-umbellate, with flowers all arising at apex of peduncle, lax; pedunculate, peduncles filiform, ca. 4–5 cm long, 1.5 mm diam., glabrous; rachis persistent, cylindrical, thick, straight, with numerous lanceolate bracts; pedicels filiform, ca. 4 cm long, 1 mm wide, glabrous. Flowers pendulous. Flower buds obovoid. Calyx aposepalous, sepals lanceolate, ca. 6 mm long, acute, glabrous. Corolla rotate, ca. 25 mm long, apopetalous, petals narrowly elliptic, 24–28 × 8–9 mm, slightly twisted at base and suddenly narrowed to ca. 0.7 mm width, subacute, abaxially greenish, tinged reddish to brownish, adaxially emerald-green, smooth, brilliant, with whitish, vibratile, clavate trichomes, ca. 2 mm long, on base of petals, otherwise glabrous; petals usually slightly spreading at anthesis. Gynostegial corona a basally fused ring of staminal and interstaminal parts which is extended basally into a completely fused skirt; skirt discoid, spreading, fleshy, white, glabrous; staminal corona lobes lanceolate, ca. 2 mm long, conniventerect, purple with translucent-white apex, laterally and abaxially with simple, thin, spreading hairs, 0.4–0.5 mm long, translucent-white; interstaminal corona lobes deltoid, ca. 2 mm long, ascending-erect with apex slightly recurved, canaliculate, occasionally apically notched, white with purple dots, laterally and abaxially covered with simple, thin, spreading hairs, 0.5-0.6 mm long, translucent-white. Gynostegium with corona atop a column, exposed above corolla, column cylindrical, ca. 1.4 × 1.6 mm, whitish. Anthers subquadrate, erect, thickened. Pollinia erect, obovoid, ca. 0.4 × 0.3 mm; corpusculum ellipsoid, ca. 0.2 mm long, with inconspicuous, ellipsoid-deltoid basal projections, caudicles linear, ca. 0.1 mm long, straight. Style head umbonate. Mericarps paired, pendulous, narrowly oblong, terete, 26–30 cm long, 4–5 mm diam., acute-angled (20–30°), shortly beaked, mottled whitish green, green or dark green, glabrous. Seeds ovate, 11 × ca. 4 mm, brown, wing ca. 1 mm wide; coma ca. 30 mm long, white. Habitat:—This species was found near the edge of the Gishwati Forest Reserve, in degraded secondary forest dominated by Neoboutonia macrocalyx Pax, Macaranga kilimandscharica Pax, Polyscias fulva (Hiern) Harms, Carapa grandiflora Sprague, Vernonia auriculifera Hiern, and Solanecio mannii (Hook. f.) C.Jeffrey at 2170 m altitude. The Gishwati Forest is a remnant of a once larger montane forest (Mildbraed 1914) that was mostly destroyed in the 1980’s due to a World Bank project, and converted into pastures. The remaining forest relic was again logged after 1994. However, it still harbors a unique diversity and species new to science were recently discovered (Fischer et al. in prep.). The local fauna is also very rich, and a small population of chimpanzees is still present (R. Chancelor & A. Rundus, pers. comm.). For a description of the vegetation of the Gishwati Forest, see Fischer & Hinkel (1994). Conservation Status: — Neoschumannia gishwatiensis is only known from the type locality in the Gishwati Forest Reserve. According to the IUCN criteria (IUCN 2012) it can be assessed as critically endangered (CR). However, the species may be more widespread in similar forests of Rwanda (e.g., Nyungwe National Park; Fischer & Killmann 2008), Burundi (Kibira National Park) or the Democratic Republic of Congo (Kahuzi-Biéga National Park; Fischer 1996). It may be overlooked as it is not very conspicuous without flowers and fruits and resembles other apocynaceous lianas. Rwanda has a special responsibility for the conservation of this unique species.Published as part of Fischer, Eberhard, Killmann, Dorothee & Meve, Ulrich, 2013, Neoschumannia gishwatiensis (Apocynaceae, Asclepiadoideae-Ceropegieae) from Gishwati Forest, Rwanda-a third and new species from a disjunct African genus, pp. 19-26 in Phytotaxa 77 (2) on pages 20-23, DOI: 10.11646/phytotaxa.77.2.1, http://zenodo.org/record/506679
Zum Status von Notothylas orbicularis und Anthoceros neesii (Anthocerotopsida) im Westerwald/Rheinland-Pfalz
No full textEberhard Fischer, Dorothee Killmann & Volker Buchbende
Die Verbreitung von Trichomanes speciosum (Hymenophyllaceae) im FFH-Gebiet "Lahnhänge"
No full textVera Maier, Dorothee Killmann, Manfred Braun & Eberhard Fische
New saxicolous species of Hypotrachyna and Parmotrema ( Parmeliaceae ) from Rwanda
No full textThe following new species of Parmeliaceae are described from Rwanda: Hypotrachyna rwandensis Elix, Bb. Fischer & Killmann and Parmotrema afrocetratum Elix, Eb. Fischer & Killmann
Erstnachweis einer epiphyllen Flechtengesellschaft (Fellhaneretum myrtillicolae Spier & Aptroot) auf Buxus sempervirens in Deutschland
No full textDorothee Killmann, Eberhard Fischer & Emmanuel Serusiau
Zur Rotalgenflora ausgewählter Mittelgebirgsbäche im nördlichen Rheinland-Pfalz und in angrenzenden Gebieten
No full textDorothee Killmann, Julia Fingerhuth, Diana Dziegielwski, Simone Rohirse, Melanie Zimmermann, Alexander Landsrath, Ursula Braun & Eberhard Fische
Pilularia ethiopica Eb. Fisch., Killmann, Mark. Ackermann & Kumelachew Yeshitela 2023, sp. nov.
No full textPilularia ethiopica Eb.Fisch., Killmann, Mark.Ackermann & Kumelachew Yeshitela, sp. nov. (Figs 1–5) Type: — ETHIOPIA. Bale Mountains National Park, growing on sand and partly covered by water in small Afroalpine pond, open Helichrysum heath with many tufted grasses, around the numerous small lakes of the area, 6 November 1988, I . Friis, A. Michelsen & Sebsebe Demissew 5727 (holotype ETH; isotype C). Diagnosis: — Pilularia ethiopica is similar to P. americana, P. bokkeveldensis, and P. dracomontana. It differs from both P. americana and P. bokkeveldensis in the smaller sporocarp, shorter pedicel and sporocarps that are subterranean at maturity, and from both P. bokkeveldensis and P. dracomontana in the obvious circinate vernation. It also differs from P. americana in the shorter fronds and from P. dracomontana in the longer fronds, longer pedicel, and permanently submerged habit of that species. Pilularia ethiopica is found in Afroalpine tarns above 3 460 m, while P. bokkeveldensis occurs in seasonal pans at 800 m and P. dracomontana in perennial sandstone tarns at 2 130–2 160 m. Additionally P. americana may have more than one leaf per node (Correll 1956), while P. ethiopica, P. bokkeveldensis, and P. dracomontana always bear only one leaf per node. Description: —Plants aquatic, partly submerged, mat-forming. Rhizome filiform, creeping, irregularly branched, up to 0.4–0.5 mm in diam., with 2(–3) roots at nodes, internodes 2.5–5.0(–11.0) mm long. Fronds borne singly at nodes, erect, simple, setiform, flexuose, 13–30(–45) mm long, 0.4–0.5 mm in diam., circinate vernation obvious. Sporocarp subterranean, globose, 1.8–2.1 mm in diam., yellowish to cream-coloured, sparsely hairy, hairs up to 3–4 cells and c. 100 µm long, appressed; sporocarps 4–locular, each locule with single sorus containing micro- and megasporangia, sporocarp pedicel arising from node on rhizome, up to 0.5–1.0 × 0.2–0.3 mm, produced laterally, bent downwards. Microsporangia clavate, several per sorus. Microspores 46–51 µm in diam. Megasporangia ellipsoid, 0.6–0.8 mm in diam. Megaspores 170–171 µm in diam. Distribution: — Pilularia ethiopica is endemic to the southern highlands of Ethiopia within the Bale Mountains and one record about 150 km west of Bale. Habitat: —The new species occurs at the margin of perennial tarns in Afroalpine grassland above 3 460 m. It is probably completely submerged in the rainy season and becomes partly exposed in the dry season. Mature sporocarps were observed in March and November. Of all genus members P. ethiopica probably occurs at the highest altitude (except the Southern American P. americana that was recorded in Peru between 4 530 and 4 593 m; Léon et al. 2018). Discussion: — Pilularia ethiopica has been misidentified as P. americana with which it shares the 4-locular sporocarps. It differs, however, in the shorter fronds [13–30(–45) mm vs. 20–90 mm], the smaller sporocarp (1.8– 2.1 mm in diam. vs. 2.0– 2.5 mm in diam.), the shorter pedicel (0.5–1.0 mm vs. 2.0– 3.7 mm), and the subterranean sporocarps at maturity. The latter feature is almost unique, only recorded hitherto in P. dracomontana. Pilularia ethiopica differs from the two other African species, P. bokkeveldensis and P. dracomontana, in the obvious circinate vernation that is usually not observable in the latter taxa (Table 1). It differs from P. bokkeveldensis in the smaller sporocarps, the shorter pedicel, and the subterranean sporocarps at maturity. Pilularia bokkeveldensis has sporocarps that grow downwards but that are epigeal at maturity. It differs from P. dracomontana in the longer fronds, the longer pedicel, and the only partly submerged habit. Pilularia ethiopica is found in Afroalpine tarns above 3 460 m, while P. bokkeveldensis is an annual that occurs in seasonal pans at 800 m, and probably survives the dry season with its sporocarps, and P. dracomontana grows in perennial sandstone tarns at 2 130–2 160 m as a permanently submerged perennial (or perhaps annual as it is not yet known whether the plants persist through the freezing winter months). For descriptions of P. bokkeveldensi s and P. dracomontana see Crouch et al. (2011) and Crouch & Wesley-Smith (2011). Additional specimens examined (paratypes):— ETHIOPIA. Bale Mountains National Park, pond below Fincha Habera Waterfalls SW of Dinsho, N07°00’58.77” E39°43’18.80” 3 462 m, 2 March 2005, Kumelachew Yeshitela s.n, (ETH); 64 km along road to Hosanna (= Hosaena), 4 November 1972, J. W . Ash 1753 (K).Published as part of Fischer, Eberhard, Killmann, Dorothee, Ackermann, Markus & Yeshitela, Kumelachew, 2023, Pilularia ethiopica (Pteridophyta, Marsileaceae), a new species of pillwort from the tropical African mountains of Ethiopia, pp. 77-86 in Phytotaxa 612 (1) on pages 78-85, DOI: 10.11646/phytotaxa.612.1.6, http://zenodo.org/record/830885
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