|
|
|
20. Lipocarpha R. Brown in Tuckey, Narr. Exped. Zaire. 459. 1818.
湖瓜草属 hu gua cao shu
Authors: Lun-Kai Dai & Gordon C. Tucker
Herbs, annual or perennial. Leaves basal; leaf blade flat. Involucral bracts leaflike. Spikes 2-7, fascicled into a capitulum or rarely single, with many bractlets and spikelets; bractlets spirally arranged, each with a spikelet. Spikelet with 2 glumes (sometimes absent) and a bisexual flower; rachilla very short, articulate at base, deciduous at article when mature; glumes alternate, membranous, several veined; basal glume without a flower; apical glume with a bisexual flower. Perianth bristles absent. Stamens 2. Stigmas 2. Nutlet 3-sided, biconvex, or plano-convex, included by subtending glume.
About 35 species: warm temperate and subtropical regions; four species in China.
|
|
|
|
| 1 |
Leaf blade 2-4 mm wide; spikes (3 or)4-7-fascicled at culm apex; bractlet apex subtruncate, acuminate; nutlet biconvex. |
|
1 L. chinensis |
| + |
Leaf blade 1-2 mm wide; spikes 2- or 3(or 4)-fascicled at culm apex; bractlet apex abruptly contracted and forming a recurved mucro; nutlet 3-sided to plano-convex |
|
(2) |
| |
|
|
|
| 2 (1) |
Bractlets blackish purple but mucro green; spikes 4-7 mm; nutlet blackish purple, narrowly ovoid. |
|
4 L. tenera |
| + |
Bractlets greenish with reddish brown striae; spikes 2-5 mm; nutlet straw-colored, narrowly oblong |
|
(3) |
| |
|
|
|
| 3 (2) |
Culms 5-40 cm; nutlet 0.9-1 mm, subtended by 2 glumes. |
|
2 L. microcephala |
| + |
Culms 5-30 cm; nutlet 0.5-0.6 mm, subtended only by a squarrose bract. |
|
3 L. squarrosa |
|
|
|
Lower Taxa
| Related Links (opens in a new window) |
|
Treatments in Other Floras @ www.efloras.org
Other Databases
|
|
|
|
|
|
|
|
|
