cháng gěng mǎ líng jù tái
长梗马铃苣苔
Oreocharis longipedicellata Lei Cai & F. Wen
分类信息
模式产地:云南省文山州麻栗坡县猛硐乡
形态特征
识别要点:Oreocharis longipedicellata morphologically resembles O. panzhouensis Lei Cai, Y.Guo & F.Wen in its ovate leaf blade, yellow flower, four separated fertile stamens, oblong anthers and bilobed, flabellate stigma, but can be easily distinguished from this species in the peduncle 20–28 cm long, bract lanceolate to elliptic, margin denticulate, the calyx 5-lobed to the base, stamens adnate to corolla 3–4 mm from base and the pistil 1.5–2 cm long.
形态特征:Perennial herb, rhizome 0.8–2 cm long, 3–5 mm in diameter. Leaves 8–15, basal, petiole 3.5–8.0 cm long, densely brown villous, leaf blade elliptic to ovate, 3.0–5.5 × 2.4–4.5 cm, adaxially densely pubescence, abaxially pubescent, densely brown villous along veins, lateral veins 3–6 on each side of midrib, apex rounded, base slightly oblique sometimes, cordate to auricula-cordate, margin crenate, with brown villous. Cymes axillary 2–5, inflorescence 4–8-flowered; peduncle 20–28 cm long, brown villous; bracts 2, lanceolate to elliptic, 10–12 × 2.5–5.0 mm, adaxially densely villous, abaxially glabrous, sometimes upper part pubescent, margin denticulate; pedicel 2.0–3.5 cm long, densely villous. Calyx 6–9 mm long, 5-lobed to the base, lobes triangular lanceolate to narrowly triangular, 6–9 mm long, 1.5–2 mm wide, outside brown villous, inside glabrous, margin denticulate. Corolla sigmoid, yellow, 2.2–2.8 cm long, outside pubescent and glandular-pubescent, inside glandular-pubescent in the throat and on adaxial lobes, tube cylindrical, slightly bent near the mouth, 1.8–2.2 cm long, 5–7 mm in diameter; limb 2-lipped; adaxial lip 2-lobed to near base, semicircular, lobes 4–5 × 3.8–4.2 mm, abaxial lip 3-lobed to base, semicircular to oval, 6–8 × 5–7 mm. Stamens 4, 1.0–1.3 cm long, adnate to corolla 3–4 mm from the base; filaments linear, glabrous; anthers oblong, 2-loculed, dehiscing longitudinally, connective glabrous; staminode 1, 0.6–1.0 mm long, inserted ca. 1 mm from the base. Disc ca. 1.5 mm high, yellow, margin undulate. Pistil 1.5–2.0 cm long, glabrous; ovary long cylindrical, 10–12 mm long; style 4–6 mm long; stigma bilobed, flabellate. Fruit unknown.
生态习性
产地:云南省文山州麻栗坡县猛硐乡
生境:生于潮湿岩石上。
物候:花期8-10月。
功用价值
植物文化:种加词 ‘longipedicellata’指本种的花序梗较长,本种的花梗也是本属中几乎最长的。