108,215 research outputs found
nudiflorum
No full textHylodesmum nudiflorum (Linnaeus) H. Ohashi & R.R. Millbare-stemmed tick-trefoildesmodie nudifloreDesmodium nudiflorumDistrict no. 2 Prince Frederickrich deciduous woodsViburnum acerifolium L
High temperature structure and thermal expansion of Co(3)Al(2)Si(3)O(12) garnet
No full textSynchrotron radiation powder diffraction patterns were taken on synthetic Co(3)Al(2)Si(3)O(12) garnet at BM8-GILDA (ESRF), at T = 298, 423, 573, 723 and 873 K. The cell parameters and atomic positions were refined by Rietveld analysis; the volume thermal expansion coefficient is alpha(V) = 28.5(9) x 10(-6) K(-1). The results on synthetic Co(3)Al(2)Si(3)O(12) garnet were compared with the high temperature structure data of X(3)Al(2)Si(3)O(12) garnets with X = Mg, Ca, Mn and Fe taken from literature. The thermal expansion of the unit cell is very similar in X(3)Al(2)Si(3)O(12) garnets, whereas the thermal expansion of the longest bonds in the distorted cubic cage surrounding the X cation decreases with increasing cation size. Contrarily to the compression behaviour, the thermal expansion in X(3)Al(2)Si(3)O(12) garnets does not change significantly as a function of composition
Sohmaea H. Ohashi & K. Ohashi 2018
No full text2. Sohmaea H.Ohashi & K.Ohashi (2018b: 159). Type: Sohmaea laxiflora (DC. 1825a: 100) H.Ohashi & K.Ohashi (2018b: 162). Uraria subgen. Desmodiastrum Schindler (1925: 15). Type: Uraria henryi Schindl. (1925: 15). Desmodium subgen. Desmodium sect. Angustistipulosa H. Ohashi (1973: 97). Type: Desmodium laxiflorum DC. (1825a: 100). Herbs to shrubs. Leaves uni- or trifoliolate, petiolate, stipulate; leaflet coriaceous, petiolulate, stipellate, lateral veins reaching the margin. Inflorescences pseudoracemose, simple or occasionally paniculate, terminal or axillary; primary bract 1, caducous; secondary bract 1, caducous. Flowers papilionaceous, pedicellate; bracteole 1 or absent; calyx connate with 4 teeth; corolla 5, with 1 standard, 2 wings and 2 connate keels; stamens 10, diadelphous; ovary unicarpellate. Pods leguminous, with a terete, oblong article; seeds rim-arillate. Seven species distribute in Africa (Senegal and Burkina Faso), India eastward toward China, Myanmar through mainland southeast Asia, and Malesia. Five species are indigenous to Thailand, Laos, Cambodia, and Vietnam. Key to the species 1. Primary bracts bearing 2-fascicled flowers. Immature pods plicate............................................................................... 2. S. hispida 1. Primary bracts bearing 3–5-fascicled flowers. Immature pods straight 2. The length of terminal leaflets 2.2–3.6 times longer than width 3. Petioles less than 1 cm long. Pod articles less than 0.7 cm long....................................................................4. S. teres 3. Petioles more than 1 cm long. Pod articles more than 0.7 cm long............................................................5. S. zonata 2. The length of terminal leaflets less than 2 times of width 4. Flowers ca. 5 mm long. Pod articles 4–6 mm long...................................................................................1. S. diffusa 4. Flowers 4–4.5 mm long. Pod articles 3–4.5 mm long............................................................................ 3. S. laxifloraPublished as part of Saisorn, Witsanu & Chantaranothai, Pranom, 2022, A taxonomic revision of two genera, Pleurolobus and Sohmaea (Leguminosae) in Thailand and Indo-China, pp. 231-246 in Phytotaxa 573 (2) on pages 236-237, DOI: 10.11646/phytotaxa.573.2.4, http://zenodo.org/record/734995
Synthesis, TEM characterization and thermal behaviour of LiNiSiO pyroxene
Full text linkA pyroxene with composition LiNiSiO was synthesized at T = 1,473 K and P = 2.0 GPa; the cell parameters at T = 298 K are a = 9.4169(6) Å, b = 8.4465(7) Å, c = 5.2464(3) Å, β = 110.534(6)°, V = 390.78(3) Å. TEM examination of the LiNiSiO pyroxene showed the presence of h + k odd reflections indicative of a primitive lattice, and of antiphase domains obtained by dark field imaging of the h + k odd reflections. A HT in situ investigation was performed by examining TEM selected area diffraction patterns collected at high temperature and synchrotron radiation powder diffraction. In HTTEM the LiNiSi O was examined together with LiCrSiO pyroxene. In LiCrSiO the h + k odd critical reflections disappear at about 340 K; they are sharp up to the transition temperature and do not change their shape until they disappear. In LiNiSiO the h + k odd reflections are present up to sample deterioration at 650 K. A high temperature synchrotron radiation powder diffraction investigation was performed on LiNiSiO between 298 and 773 K. The analysis of critical reflections and of changes in cell parameters shows that the space group is P-centred up to the highest temperature. The comparative analysis of the thermal and spontaneous strain contributions in P2/c and C2/c pyroxenes indicates that the high temperature strain in P-LiNiSiO is very similar to that due to thermal strain only in C2/c spodumene and that a spontaneous strain contribution related to pre-transition features is not apparent in LiNiSiO. A different high-temperature behaviour in LiNiSiO with respect to other pyroxenes is suggested, possibly in relation with the presence of Jahn-Teller distortion of the M1 polyhedron centred by low-spin Ni
Sohmaea diffusa H. Ohashi & K. Ohashi 2018
No full text1. <i>Sohmaea diffusa</i> (DC. 1825a: 100) H.Ohashi & K.Ohashi (2018b: 161). <p> <i>≡</i> <i>Desmodium diffusum</i> DC.</p> <p> Type:— India orient, <i>Lambert s.n.</i> (lectotype G-DC! G00317409, designated by Ohashi & Xiang-Yun, 2005).</p> <p> <i>≡</i> <i>Hedysarum diffusum</i> [Roxburgh (1814: 57), <i>nom. nud.</i>] Roxburgh (1832: 357), <i>non</i> Willdenow (1802: 1180), <i>nom. illeg.</i> Type:— India orient, <i>Roxburgh s.n.</i> (syntypes BM, n.v. & BR! BR0000009894365 [digital image]).</p> <p> <i>=</i> <i>Desmodium laxiflorum</i> DC. var. <i>formosense</i> Ohwi (1951: 235). Type:— TAIWAN (Formosa). Fujieda in Kizangun, <i>Okamoto s.n.</i> (holotype KYO, n.v.), <i>fide</i> Ohashi & Zhu (2005).</p> <p> <i>=</i> <i>Desmodium laxiflorum</i> subsp. <i>parvifolium</i> H.Ohashi & T.T.Chen (1983: 268). Type:— TAIWAN. Pingtung Co., Mutan, 350–400 m, 26 Oct. 1982, <i>Ohashi et al. 13486</i> (holotype TUS, n.v., isotypes TAI, n.v., TI, n.v., TUS, n.v.), <i>fide</i> Ohashi & Zhu (2005).</p> <p> <i>=</i> <i>Desmodium unibotryosum</i> C.Chen & X.J. Cui (1987: 307), <i>nom. illeg.</i></p> <p> Herb, 10–70 cm high; stems and twigs terete, glabrescent or appressed pubescent. <i>Leaves</i> trifoliolate, rarely unifoliolate on lower part of plant, spirally arranged; stipules triangular, 3–10 × 2–3.5 mm, apex long acuminate, curved or straight, surface glabrescent to puberulous; petioles (0.3–) 1.5–2.5 cm long, appressed pubescent and uncinate; rachis 3–10 mm, appressed pubescent and uncinate. <i>Leaflets</i>: stipels filiform, 1.5–3 mm long, apex pointed, glabrescent; petiolules 1.5–2 mm long, pubescent. <i>Terminal leaflet</i> ±elliptic to obovate, 1.5–6.5 × 1–3.5 cm, apex acute to attenuate, base cuneate to obtuse, margin entire, upper surface sparsely straight and uncinate hairy, lower surface densely pubescent; lateral veins 5–7 per side, prominent. <i>Lateral leaflets</i> ±elliptic to ovate, 1–3.5 × 0.5–2 cm, apex acute, base obtuse, margin entire, both upper and lower surfaces like terminal leaflet; lateral veins 5–7 per side, prominent. <i>Inflorescences</i> 10–20 cm long, terminal at both terminal and lateral shoots; rachis straight and uncinate hairy. <i>Primary bract</i> narrowly ovate, ca. 3 × 0.7 mm, apex long acuminate, margin fimbriate, surface pubescent, distinctly veined, enclosing 4-immature flowers and secondary bract. <i>Secondary bract</i> narrowly ovate, 2–2.8 × 0.3–0.5 mm, margin fimbriate, surface pubescent. <i>Flowers</i> ca. 5 mm long, 4-flowered fascicles; bracteoles absent; pedicels 3–4 mm long, with straight hairs on lower most and densely uncinate hairs toward the upper part of pedicel. <i>Calyx</i> dark brownish red, 2.5–3 mm long, base obtuse; outside pubescent, inside glabrous, tube ca. 1.2 mm long; teeth 1–1.2 mm long, ±equal to tube length, upper tooth shallowly divided, ca. 0.3 mm deep. <i>Corolla</i>: standard light blue, wings and keels white; standard broadly ovate, 5.5–6 × 4–4.5 mm, apex emarginate, base attenuate to cuneate, entire at base, claw 1–1.7 mm long; wings slightly oblong to obovate, 4.5–5 × 1.5–2 mm, apex obtuse to rounded, base auriculate, 0.2–0.4 mm long, claw 0.5–0.8 mm long; keels narrowly curved, 4.5–5 × 1.3–1.5 mm, apex acute to obtuse, base auriculate, ca. 0.2 mm long, claw 1–1.8 mm long. <i>Stamens</i> 4.5–5 mm long; anthers ellipsoid, ca. 0.3 × 0.2 mm. <i>Gynoecium</i> 4.5–5 mm long; ovary oblong, sessile, laterally compressed, with minutely hairs, 6–8-ovulate; style 1.5–2 mm long, glabrescent; stigma minutely capitate. <i>Pods</i> indehiscent, 6–8-articulate, oblong, 3–3.5 × 0.2 cm, surface densely uncinate, smooth, upper and lower sutures repand, equally constricted, less than 0.5 mm deep; isthmus ca. 3/5 as broad as the pod; articles linear-oblong, 4–6 mm long, prominently longer than broad; pod stipe ca. 1.5 mm long, glabrescent; fruiting pedicels 3–4 mm long, pubescent, with straight hairs on lower most and densely uncinate hairs toward the apex. <i>Seeds</i> transversely oblong.</p> <p> <b>Distribution</b>:— India, Nepal, Bhutan, Myanmar, China, Taiwan, Thailand, Indonesia, Philippines, and Papua New Guinea.</p> <p> <b>Ecology</b>:—Open areas of deciduous and bamboo forests; ca. 635 m elev.</p> <p> <b>Phenology</b>:—Flowering in September–October. Fruiting in October–November.</p> <p> <b>Specimens examined:—</b> <b>THAILAND.</b> Chiang Mai: Mae Rim, Doi Suthep, 1 Oct. 1988, <i>Maxwell 88-1161</i> (CMU, L), Samoeng, Karen village, 11 Oct. 2001, <i>Maxwell 01-522</i> (CMUB) & Mae Rim, Mae Sa Botanical Garden, 5 Oct. 1989, <i>Pooma 372</i> (BKF); Nan: Doi Phu Kha, 31 Oct. 2013, <i>Clark et al. 303</i> (K); <b>LAOS.</b> Houa Phan: Na Ham, Sam Neua, 14 Sept. 1920, <i>Poilane 1851</i> (AAU, BKF, L, P-2 sheets); Entre N. Dlet et M. Seng Traminh, 800–1000 m, 13 Sept. 1929, <i>Poilane 16940</i> (P); 240 Km de la route de Vinh au Tanninh, 1500–1600 m, 30 Aug. 1929, <i>Poilane 16790</i> (P-2 sheets); <b>VIETNAM.</b> Tonkin: Moc Ha, 10 Oct. 1891, <i>Balansa 4493</i> (P), without locality, Oct. 1887, <i>Balansa 2205</i> (P), Tonkin Occidental, <i>Bon 6070</i> (P-2 sheets), Tonkin Occidental, <i>Bon 6071</i> (P-2 sheets) & Tonkin Occidental, <i>Bon s.n.</i> (G); Hanoi: Nam Cong, 18 Nov. 1891, <i>Bon 4923</i> (P-4 sheets); Lao Cai: route de Lao Kay à Chapa, 200–1400 m, 25 Sept. 1943, <i>Petelot B. 390</i> (P-2 sheets) & entre Bao Nhai et Pakha, 500–600 m, 10 Dec. 1935, <i>Poilane 25021</i> (P-3 sheets); Yen Bai: Bao Ha, 21 Feb. 1936, <i>Poilane 25248</i> (BKF, P); Hoa Binh: Cho Bo, 15 Nov. 1887, <i>Balansa 2194</i> (P); Nghe An: Pu Mat, Khe Bu, 17 July 1998, <i>Khoi C 556</i> (HNU) & Pu Mat, Khe Bu, 17 July 1998, <i>Khoi C 557</i> (HNU); Ba Ria-Vung Tau: Long Son, Quan Ho, 20 Oct. 1911, <i>Lecomte & Finet 11</i> (P).</p>Published as part of <i>Saisorn, Witsanu & Chantaranothai, Pranom, 2022, A taxonomic revision of two genera, Pleurolobus and Sohmaea (Leguminosae) in Thailand and Indo-China, pp. 231-246 in Phytotaxa 573 (2)</i> on pages 237-238, DOI: 10.11646/phytotaxa.573.2.4, <a href="http://zenodo.org/record/7349951">http://zenodo.org/record/7349951</a>
High temperature single crystal investigation in a clinopyroxene of composition Na0.50Ca0.50Cr0.50Mg0.50Si2O6
No full textPleurolobus flexuosus H. Ohashi & K. Ohashi 2018
No full text1. <i>Pleurolobus flexuosus</i> (Wallich 1831: 195 ex Bentham 1852: 224) H.Ohashi & K. Ohashi (2018c: 386). <p> <i>≡</i> <i>Desmodium flexuosum</i> Wall. ex Benth.</p> <p> Type:— MYANMAR. Montes Prome, 1826, <i>Wallich 5691</i> (lectotype K-W! K001121777, designated here, isolectotypes G!-2 sheets, BM!, K! K000858866, CAL, <i>n.v.</i>).</p> <p> <i>≡</i> <i>Meibomia flexuosa</i> (Wall. ex Benth.) Kuntze (1891: 198).</p> <p> Creeping herb; stems and twigs angular or subterete, brown pubescent. <i>Leaves</i> subalternately or spirally arranged; stipules, narrowly triangular, 5–10 × 1–1.5 mm, apex acuminate, surface long pubescent; petioles (0.3–) 1.5–3.5 cm long, densely erect pubescent. <i>Leaflet</i> coriaceous; stipels narrowly triangular to filiform, 2–5 mm long, apex pointed, surface glabrescent to pubescent; petiolules 1–3 mm, densely pubescent; leaf blade cordate, broadly obovate to broadly elliptic, 1.5–6.5 × 1.5–6 cm, apex ±acute to rounded or shallowly emarginate, base ±cordate, margin entire, upper surface glabrescent, lower surface appressed pubescent, denser than upper surface; lateral veins 7–9 per side. <i>Inflorescences</i> pseudoracemose or paniculate, with a few branches, 5–15 cm long; rachis and rachilla densely pubescent and minutely uncinate. <i>Primary bract</i> 3–7 × 0.5 mm, apex pointed, surface long pubescent, enclosing 2-immature flowers and secondary bract. <i>Secondary bract</i> persistent, narrowly triangular, ca. 1 × 0.3 mm, pubescent. <i>Flowers</i> 2–2.5 mm long, 2-flowered fascicles; pedicels 2–2.5 mm long, with uncinate hairs. <i>Calyx</i> 1.5–2 mm long, base obtuse; outside white pubescent, tube ca. 1 mm long; teeth 4, 0.8–1 mm long, ±equal to tube length, upper tooth shallowly divided, less than 0.2 mm long. <i>Corolla</i>: standard broadly obovate, ca. 3 × 3 mm, apex shallowly emarginate, base attenuate, entire or slightly auriculate at base, claw very short; wings ca. 3 × 1.2 mm, ±equal to the keel petals, apex obtuse, base not auriculate, claw ca. 0.5 mm long; keels curved, ca. 3.2 × 1.5 mm, the broadest part near the apex, apex obtuse, base not auriculate, claw ca. 1.5 mm long. <i>Stamens</i> ca. 3 mm long. <i>Gynoecium</i> ca. 3.5 mm long; ovary appressed pubescent; style ca. 1.5 mm long, glabrescent; stigma minutely capitate. <i>Pods</i> dark brown to black, 3–4-articulate, straight, 7–10 × 2–2.5 mm, surface sparsely uncinate, inconspicuously reticulate-patterned, upper suture undulate, lower suture more constricted than upper suture, ca. 1 mm deep; isthmus 2/5 as broad as the pod; articles obliquely ovate or subcircular, ca. 3 mm long; pod usually sessile or shortly stipitate, ca. 0.5 mm long; fruiting pedicels 2.5–3 mm long, with uncinate hairs. <i>Seeds</i> transversely elliptic.</p> <p> <b>Distribution</b>:— Myanmar, Thailand, and Cambodia.</p> <p> <b>Ecology</b>:—In teak plantation, with bamboo and deciduous forests; 30–400 m elev.</p> <p> <b>Phenology</b>:—Flowering in November. Fruiting in November–February.</p> <p> <b>Notes</b>:— Two specimens, <i>Maxwell 06-874</i> (CMUB) and <i>Pierre 1006</i> (P) are newly recorded for Cambodia. <i>Desmodium flexuosum</i> Wall. ex Benth. was validly published. Five original specimens were examined at BM, G, K, and K-W by authors and one duplicate was recorded by Ohashi (1973). All specimens are from the same gathering and in a perfect condition. A specimen kept at K-W (K001121777) is selected here as the lectotype because it is well preserved in Wallich’s collection at Kew.</p> <p> <b>Specimens examined</b>:— <b>THAILAND.</b> Chiang Mai: Doi Suthep, 1100 m, 17 Oct. 1910, <i>Kerr 1480</i> (ABD, BM, C, K-2 sheets, L, P), Doi Suthep, 1200 m, 28 Nov. 1911, <i>Kerr 1480B</i> (BM, E, K, L, P) & Doi Suthep-Pui National Park, 350 m, 19 Dec. 1989, <i>Maxwell 89-1568</i> (CMU, E, L); Lampang: Chae Son, Ban Sa, 400 m, 7 Nov. 2008, <i>Maxwell 08-198</i> (CMUB); <b>CAMBODIA.</b> Kratie: Sambour, Mekong River, 30 m, 15 Nov. 2006, <i>Maxwell 06-874</i> (CMUB) & May 1870, <i>Pierre 1006</i> (G, P).</p>Published as part of <i>Saisorn, Witsanu & Chantaranothai, Pranom, 2022, A taxonomic revision of two genera, Pleurolobus and Sohmaea (Leguminosae) in Thailand and Indo-China, pp. 231-246 in Phytotaxa 573 (2)</i> on pages 232-233, DOI: 10.11646/phytotaxa.573.2.4, <a href="http://zenodo.org/record/7349951">http://zenodo.org/record/7349951</a>
The high-pressure C2/c -P21/c phase transition along the LiAlSi2O6 - LiGaSi2O6 solid solution
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