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红头索
,無編輯摘要
花2-4朵集生于无叶的枝端；苞片卵形或圆卵形，长5-14毫米，宽3-9毫米；花梗长2-10毫米，密被铁锈色柔毛；花萼长8-9毫米，分裂近达基部，裂片狭披针形，宽约1.2毫米，先端渐尖，背面被柔毛；花冠黄色，长10-14毫米，基部合生部分长3-4毫米，裂片椭圆形，宽5-6毫米，先端钝或具小骤尖头，散生少数暗红色腺点，或有时腺点不明显；花丝基部合生成高约3毫米的筒，分离部分长3-5毫米；花药长圆形，长约2毫米；花粉粒近长球形 [(31-34.5) × (26-29.5)微米]，表面具网状纹饰；子房密被铁锈色柔毛，花柱长5-7毫米。花期7月。
Herbs perennial, to 40 cm tall. Stems prostrate, ascending, subterete, usually branched, rust-colored pilose. Leaves opposite; petiole 1--2 cm, densely pubescent; leaf blade ovate to broadly ovate, rarely suborbicular, 1.5--3.5 X 1.2--2.5 cm, papery, strigillose, sparsely transparent or dark glandular punctate, base subrounded to broadly cuneate, apex rounded to apiculate; veins 3 or 4 pairs; veinlets inconspicuous. Umbels in axils of medial leaves, 2--4-flowered; peduncle 1.8--3.5 cm; bracts ovate to orbicular-ovate, 5--14 X 3--9 mm. Pedicel 2--10 mm, densely rust-colored pubescent. Calyx lobes narrowly lanceolate, 8--9 X 1--1.2 mm, abaxially pubescent, apex acuminate. Corolla yellow; tube 3--4 mm; lobes elliptic, 7--10 X 5--6 mm, sparsely dull red glandular punctate, apex obtuse to apiculate. Filaments connate basally into a ca. 3 mm high tube, free parts 3--5 mm; anthers oblong, dorsifixed, opening by lateral slits, ca. 2 mm. Ovary rust-colored puberulous; style 5--7 mm. Capsule unknown. Fl. Jul.
* Wet areas in ravines, woodland margins; 1800--3100 m. Sichuan (Emei Shan).
==红头索生长环境==
生长于海拔1800-3100米的林缘路边。