|
|
|
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
| Related Links (opens in a new window) |
|
Treatments in Other Floras @ www.efloras.org
Other Databases
|
|
|
|
|
|
|
|
|
