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FOC | Family List | FOC Vol. 12 | Tiliaceae

7. Triumfetta Linnaeus, Sp. Pl. 1: 444. 1753.

刺蒴麻属 ci shuo ma shu

Bartramia Linnaeus.

Herbs, rarely subshrubs, annual or perennial, erect or procumbent, hairs with swollen base, stellate or with 1 ray and apparently simple. Leaves alternate, simple or palmately 3-5-lobed, palmately veined, margin serrate. Flowers solitary or arranged in small cymes or fascicles, axillary, opposite to leaves, bisexual; peduncle very short. Sepals 5, free, valvate, usually with hooked appendages at tip. Petals as many as sepals, free, thickened glands on base of adaxial surface. Stamens 5 to numerous; filaments free; anthers dorsifixed, subglobose, dehiscence longitudinal, borne on androgynophore; androgynophore fleshy, segmented, short, with 5 glands opposite to petals. Ovary 2-5-loculed; ovules 2 per locule; style simple; stigma 2-5-lobed. Fruit a capsule nearly globose, 3-6-valved, spiny or strigose, loculicidally dehiscent or indehiscent, spine tips pointed, straight or hooked. Seeds with endosperm; cotyledons fleshy, epigeous.

Between 100 to 160 species: primarily in tropical and subtropical areas, several species are widespread weeds; seven species in China.

1 Capsule dehiscent, spines 3-10 mm; leaf blade not lobed   (2)
+ Capsule indehiscent, spines 1.5-4 mm; blade of lower leaves often 3-5-lobed or coarsely dentate   (4)
2 (1) Capsule spines glabrous or hairy at base only; leaf blade hairs mostly unbranched, occasionally few-rayed on main veins; flower bud nearly glabrous.   3 T. annua
+ Capsule spines uniformly hairy; leaf blade hairs mostly obviously stellate, abaxially tomentose; flower bud obviously hairy   (3)
3 (2) Capsule spines with straight or gently curved apex; pedicel ca. 1.5 mm.   1 T. cana
+ Capsule spines with strongly hooked apex; pedicel 3-5 mm.   2 T. pilosa
4 (1) Blade of upper leaves 0.7-1.5 cm wide, abaxial hairs apparently simple.   4 T. grandidens
+ Blade of upper leaves 1.5-6 cm wide, abaxial hairs stellate   (5)
5 (4) Leaf blade base cordate, abaxial surface densely yellow-brown tomentose, apex obtuse; stamens 20-35.   7 T. procumbens
+ Leaf blade base broadly cuneate or rounded, abaxial surface pilose or pubescent, apex acute or acuminate; stamens 10 or 15-20   (6)
6 (5) Pedicels less than 1 mm; stamens 10.   5 T. rhomboidea
+ Pedicels 2-3 mm; stamens 15 or more.   6 T. semitriloba

Lower Taxa


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