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31. Diplacrum R. Brown, Prodr. 240. 1810.
裂颖茅属 lie ying mao shu
Authors: Shuren Zhang, Gordon C. Tucker & Jeremy J. Bruhl
Herbs, annual or occasionally perennial, tenuous, with thin fibers. Leaves cauline, sheathing, without a ligule, regularly spaced along stem; leaf blade linear, short. Inflorescence a capitate cyme, condensed, exserted from leaf sheath. Spikelets unisexual. Male spikelets basal on inflorescence; glumes usually 3, usually thin and narrow, each with 1 or 2 male flowers. Female spikelets apical on inflorescence; glumes 2, opposite, equal in size, veined, each with 1 female flower, apex 3-lobed or not. Male flowers: anthers 1-3. Female flowers: stigmas 3. Disk present. Nutlet small, globose, with vertical ribs or reticulate, sometimes apically hairy, tightly enclosed in 2 subtending glumes and shed with them.
About six species: tropics into warm temperate regions of both hemispheres; two species in China.
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Glume subtending female flower prominently several veined, apex 3-lobed; nutlets globose, with 3 longitudinal ribs and rectangular reticulation. |
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1 D. caricinum |
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Glume subtending female flower with only a prominent midvein, apex not lobed; nutlets depressed globose, with 3 longitudinal ribs and square reticulation between ribs. |
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2 D. reticulatum |
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Lower Taxa
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Treatments in Other Floras @ www.efloras.org
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