44. SPENCERIA Trimen, J. Bot. 17: 97. 1879.
马蹄黄属 ma ti huang shu
Li Chaoluan (Li Chao-luang); Hiroshi Ikeda, Hideaki Ohba
Herbs perennial, white villous throughout. Rhizome woody, densely covered with remains of old petioles. Stems erect, terete, simple. Radical leaves: stipules ovate, herbaceous, adnate to petiole; petiole sheathing at base; leaf blade imparipinnate; leaflets opposite, rarely alternate, broadly elliptic or obovate-oblong; cauline leaves few, with few leaflets, or simple and then margin 3-lobed or 2- or 3-serrate. Inflorescences terminal, laxly racemose; bract entire or 3-lobed; involucre close to petals, cupular, 7- or 8-lobed, lobes narrowly ovate to lanceolate. Hypanthium obconic. Sepals 5, valvate, broadly linear to lanceolate, persistent; epicalyx segments 5, semiorbicular or triangular. Petals 5, golden or cream, oblanceolate to obovate. Stamens 30–40, in 2 or 3 series; filaments dilated and connate at base, persistent. Carpels (1 or)2, at base of hypanthium, apically villous; ovary ovoid-cylindric; ovule 1, pendulous; style subterminal, filiform, long exserted from hypanthium; stigma minute. Fruit composed of flower parts excluding deciduous petals, dry and somewhat hardened. Achene 1, subglobose, with thin coat, enclosed in hypanthium. Seed lacking endosperm; cotyledons subsquare, large.
One species: Bhutan, China.