Description
(
Inglês
)
fornecido por eFloras
Trees to 30 m tall; bark brown or grayish black. Branchlets yellow-brown, densely yellow villous. Petiole 0.8-1.5 cm, densely yellow pubescent; leaf blade ovate-elliptic, oblong, or ovate-lanceolate, 5-14 × 2-8 cm, both surfaces densely villous when young, abaxially densely resinous punctate and bearded in axils of lateral veins, base rounded or subcordate, margin irregularly and doubly subincurved setiform serrate; apex acuminate; lateral veins 13 or 14 on each side of midvein. Female inflorescences 2, narrowly cylindric, 2.5-10 cm × 5-7(-10) mm; peduncle 7-10 mm, densely yellow pubescent; bracts oblong-lanceolate, 2-3 × 1.5-1.7 mm, sparsely pubescent at base, ciliolate, spongy at base when mature, 3-lobed, middle lobe ovate-lanceolate, lateral lobes ± reduced, ca. 1/3 as long as middle lobe. Nutlet ovate or oblong, ca. 2 × 1-1.5 mm, densely pubescent at apex, with membranous wings ca. 2 × as wide as nutlet. Fl. Apr-Jun, fr. Jul-Aug. 2n = 28.
- licença
- cc-by-nc-sa-3.0
- direitos autorais
- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Distribution
(
Inglês
)
fornecido por eFloras
?Sichuan, SE Xizang, NW Yunnan [Bhutan, India]
- licença
- cc-by-nc-sa-3.0
- direitos autorais
- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Habitat
(
Inglês
)
fornecido por eFloras
Subtropical and warm temperate broad-leaved forests; 1400-2800 m.
- licença
- cc-by-nc-sa-3.0
- direitos autorais
- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Synonym
(
Inglês
)
fornecido por eFloras
Betula acuminata Wallich var. cylindrostachya (Lindley) Regel; B. alnoides Buchanan-Hamilton var. cylindrostachya (Lindley) H. Winkler; Betulaster cylindrostachya (Lindley) Spach.
- licença
- cc-by-nc-sa-3.0
- direitos autorais
- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Cyclicity
(
Inglês
)
fornecido por Plants of Tibet
Flowering from April to June; fruiting from July to August.
- licença
- cc-by-nc
- direitos autorais
- Wen, Jun
Diagnostic Description
(
Inglês
)
fornecido por Plants of Tibet
Betula cylindrostachya is close relative of Betula rhombibracteata, but differs from the latter in its scales of buds villous (vs. glabrous), petiole densely yellow villous (vs. glabrous except villous in furrow), bracts oblong-lanceolate, 2-3 × 1.5-1.7 mm, pubescent at base (vs. rhombic, 4-5 × ca. 3 mm, glabrous), nutlet ca. 2 × 1-1.5 mm (vs. 3-5 × 1.5-3 mm).
- licença
- cc-by-nc
- direitos autorais
- Wen, Jun
Distribution
(
Inglês
)
fornecido por Plants of Tibet
Betula cylindrostachya is occurring in Sichuan, SE Xizang, NW Yunnan of China, Bhutan, India.
- licença
- cc-by-nc
- direitos autorais
- Wen, Jun
Evolution
(
Inglês
)
fornecido por Plants of Tibet
The phylogenetic relationships within the genus Betula (Betulaceae) were investigated using a part of the nuclear ADH gene and DNA sequences of the chloroplast matK gene with parts of its flanking regions (Järvinen et al., 2004). Two well-supported phylogenetic groups could be identified in the chloroplast DNA sequence: one containing the three American species B. lenta, B. alleghaniensis, and B. papyrifera and the other including all the other species studied. The ADH gene displayed more variation, and three main groups could be identified. The ADH phylogeny suggests that several independent polyploidizations within the genus Betula could have taken place. The ADH and chloroplast phylogenies were in part incongruent, the most likely reason for this seems to be cytoplasmic introgression.
- licença
- cc-by-nc
- direitos autorais
- Wen, Jun
General Description
(
Inglês
)
fornecido por Plants of Tibet
Trees to 30 m tall; bark brown or grayish black. Branchlets yellow-brown, densely yellow villous. Petiole 0.8-1.5 cm, densely yellow pubescent; leaf blade ovate-elliptic, oblong, or ovate-lanceolate, 5-14 cm long, 2-8 cm wide, both surfaces densely villous when young, abaxially densely resinous punctate and bearded in axils of lateral veins, base rounded or subcordate, margin irregularly and doubly subincurved setiform serrate; apex acuminate; lateral veins 13-14 on each side of midvein. Female inflorescences 2, narrowly cylindric, 2.5-10 cm long, 5-7 mm wide; peduncle 7-10 mm, densely yellow pubescent; bracts oblong-lanceolate, 2-3 mm long, 1.5-1.7 mm wide, sparsely pubescent at base, ciliolate, spongy at base when mature, 3-lobed, middle lobe ovate-lanceolate, lateral lobes ± reduced, ca. 1/3 as long as middle lobe. Nutlet ovate or oblong, ca. 2 mm long, 1-1.5 mm wide, densely pubescent at apex, with membranous wings ca. 2 × as wide as nutlet.
- licença
- cc-by-nc
- direitos autorais
- Wen, Jun
Habitat
(
Inglês
)
fornecido por Plants of Tibet
Growing in subtropical and warm temperate broad-leaved forest; 1400-2800 m.
- licença
- cc-by-nc
- direitos autorais
- Wen, Jun
Betula cylindrostachya
(
Islandês
)
fornecido por wikipedia IS
- licença
- cc-by-sa-3.0
- direitos autorais
- Höfundar og ritstjórar Wikipedia
Betula cylindrostachya: Brief Summary
(
Islandês
)
fornecido por wikipedia IS
Betula cylindrostachya er tegund af birkiætt sem var lýst af John Lindley og Nathaniel Wallich. Engar undirtegundir finnast skráðar.
- licença
- cc-by-sa-3.0
- direitos autorais
- Höfundar og ritstjórar Wikipedia
Betula cylindrostachya
(
Vietnamita
)
fornecido por wikipedia VI
Betula cylindrostachya là một loài thực vật có hoa trong họ Betulaceae. Loài này được Lindl. ex Wall. mô tả khoa học đầu tiên năm 1830.[1]
Chú thích
Liên kết ngoài
- licença
- cc-by-sa-3.0
- direitos autorais
- Wikipedia tác giả và biên tập viên
Betula cylindrostachya: Brief Summary
(
Vietnamita
)
fornecido por wikipedia VI
Betula cylindrostachya là một loài thực vật có hoa trong họ Betulaceae. Loài này được Lindl. ex Wall. mô tả khoa học đầu tiên năm 1830.
- licença
- cc-by-sa-3.0
- direitos autorais
- Wikipedia tác giả và biên tập viên
长穗桦
(
Chinês
)
fornecido por wikipedia 中文维基百科
二名法 Betula cylindrostachyaLindl. 长穗桦(学名:Betula cylindrostachya)是桦木科桦木属的植物。分布在印度以及中国大陆的云南、西藏等地,生长于海拔2,500米至2,800米的地区,常生长在林中,目前尚未由人工引种栽培。
参考文献
- 昆明植物研究所. 长穗桦. 《中国高等植物数据库全库》. 中国科学院微生物研究所. [2009-02-23]. (原始内容存档于2016-03-05).
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长穗桦: Brief Summary
(
Chinês
)
fornecido por wikipedia 中文维基百科
长穗桦(学名:Betula cylindrostachya)是桦木科桦木属的植物。分布在印度以及中国大陆的云南、西藏等地,生长于海拔2,500米至2,800米的地区,常生长在林中,目前尚未由人工引种栽培。