Introduction of Epilobium Herb in Epilobium sect:(16).Epilobium brevifolium D.Don.
✵The article gives records of the herb (16).Epilobium brevifolium D.Don., its English name, Latin name, common names, property and flavor, its botanical source plant species, with a detailed introduction to the botanical features of this plant species, the growth characteristics, and ecological environment of this plant species.
Epilobium sect:(16).Epilobium brevifolium D.Don.
Introduction: Epilobium sect is a section in the Epilobium genus of the Onagraceae family (evening primrose family), perennial herbs, upright, ascending, or prostrate. Stems are cylindrical or quadrangular. Leaves are opposite (occasionally whorled) at least below inflorescence and alternate sparsely spirally (E. sinense H. Lev.). Flowers are actinomorphic, parallel to the stem axis when blooming; flower tube exists; petal apex is concave to deeply 2-lobed; stamens vary in length in 2 whorls, pollen grains are yellow, pollinated by quadruple pollen; style is always upright; stigma is usually entire, clavate to capitate, as long as or higher than stamens, sometimes 4-lobed and higher than stamens.
Botanical description: Epilobium brevifolium D.Don. is classified in the Epilobium genus, of the Onagraceae family., it is also known as the Blunt-leaf willow herb. Its synonym is Epilobium trichoneurum var. brachyphyllum.
Epilobium brevifolium D.Don. is a perennial herb, upright, overwintering root suckers grow from the base of the stem; Stems grow up to 25~60 cm, 2.5~4 mm thick, unbranched or sparsely branched, pilose, often mixed with glandular hairs at the upper part, without ridgeline; Leaves are opposite, alternate on inflorescence, broadly ovate or ovate, 2.5~4.5 cm long and 1.5~2.2 cm wide, the base is nearly cordate, with sharp teeth or inconspicuous shallow teeth, 5~6 pairs of lateral veins, the base is nearly cordate, both sides and veins are villous, sometimes mixed with a few glandular hairs; Petiole is 1~4 mm long, or subsessile;
The inflorescence is upright to slightly pendulous. Flowers are upright, or slightly drooping when blooming; The bud is narrowly ovoid, 4~7 mm long and 2.5~3.5 mm in diameter; Ovary is 2~3 cm long, villous, sometimes mixed with glandular hairs; Pedicel length is 0.5~0.8 cm; The length of the flower tube is 1~1.4 mm, the diameter is 2~2.5 mm, and the throat part has a few long hairs; Enacious fragments are lanceolate oblong, carinate (cariniform), 4.5~6.5 mm long, 1~1.2 mm wide, villous and glandular-hairy; Petals are pink to rose-purple, inverted cordate, 9~11 mm long, 4~5 mm wide, concave depth of apex is 1.2~2 mm; Anthers are oblong, 1~1.4 mm long and 0.4~0.6 mm wide; The length of the outer filament wheel is 4~5 mm, and the length of the inner filament wheel is 2.5~3.5 mm; Style is upright, 3~5 mm long, glabrous; Stigma is broadly clavate or clavate, 2~3.2 mm high, 1~1.6 mm in diameter, nearly as high as or slightly higher than outer stamens at flowering. The capsular fruit is 5~7 cm long, and is pilose, sometimes mixed with glandular hairs; The carpopodium (fruit stalk) is 0.4~1.5 cm long. The seeds are oblong and obovate, 0.9~1.1 mm long and 0.4~0.5 mm wide, with a short rostrum (beak) at the top, dark brown, and papillae on the surface; The tassel is gray-white, 5~10 mm long and easy to fall off. Its flowering period is from June to July and fruiting from August to September.
Ecological environment: Epilobium brevifolium D.Don. is endemic to the Himalayas area, in China it grows in southeastern Tibet and western Yunnan, and it also grows in Nepal. The plant grows in the wet places near the ravines in mountainous areas at altitudes of 1,700~2,100 meters. Epilobium brevifolium D.Don. is a unique plant species of the Himalayan region.
Related subspecies: The subspecies of Epilobium brevifolium D.Don. are the original subspecies Epilobium brevifolium D.Don subsp. brevifolium and Epilobiumbrevifolium D. Don subsp. trichoneurum(Hausskn.) Raven subspecies.
Epilobium brevifolium D.Don subsp.brevifolium: This species is an original subspecies of Epilobium brevifolium D.Don., it is a species of China-Himalayan flora. Its plant size, leaf shape and size, hairs, and stigma shape vary greatly, but it is characterized by curly hair around the stem, no ridgeline, obvious petiole, cuneate (wedge-shaped) base, head-shaped stigma, and short carpopodium (fruit stalk), which makes it easy to distinguish it from other species.
Epilobium brevifolium D.Don subsp.trichoneurum(Hausskn.) Raven: The main difference from Epilobium brevifolium D.Don subsp.brevifolium is, the stem often rises, especially the upper part is glandular-hairy and villous around it; The leaves are narrowly ovate to lanceolate, the base is round or cuneate (wedge-shaped), the back surface is often purplish red, and the veins are densely covered with hairs. Its flowering period is from July to September and fruiting from September to October. This species grows in the upper reaches of the Yellow River, the middle and lower reaches of the Yangtze River, the southeast coast, and the southwest of China. The plant grows in the wet places of grassy slopes, river valleys and gullies, and ponds in mountainous areas. The altitude is 600~1,800 meters in South China and East China, and 900~2,500 meters in the west. This taxon is widely distributed in eastern Asia, and it is a floristic species of the warm temperate zone in East Asia. Its posture, leaf shape, stem and hair cover, etc. vary greatly.
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1.Introduction of Epilobium Herb in Epilobium sect:(16).Epilobium brevifolium D.Don.
✵The article gives records of the herb (16).Epilobium brevifolium D.Don., its English name, Latin name, common names, property and flavor, its botanical source plant species, with a detailed introduction to the botanical features of this plant species, the growth characteristics, and ecological environment of this plant species.
Introduction: Epilobium sect is a section in the Epilobium genus of the Onagraceae family (evening primrose family), perennial herbs, upright, ascending, or prostrate. Stems are cylindrical or quadrangular. Leaves are opposite (occasionally whorled) at least below inflorescence and alternate sparsely spirally (E. sinense H. Lev.). Flowers are actinomorphic, parallel to the stem axis when blooming; flower tube exists; petal apex is concave to deeply 2-lobed; stamens vary in length in 2 whorls, pollen grains are yellow, pollinated by quadruple pollen; style is always upright; stigma is usually entire, clavate to capitate, as long as or higher than stamens, sometimes 4-lobed and higher than stamens.
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