Difference between revisions of "Urochloa villosa"

(Lam.) T.Q. Nguyen
Common names: Hairy signalgrass
Synonyms: Brachiaria distichophylla
Treatment appears in FNA Volume 25. Treatment on page 501.
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|hierarchy=Poaceae;Poaceae subfam. Panicoideae;Poaceae tribe Paniceae;Urochloa;Urochloa villosa
 
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name=Urochloa villosa
 
name=Urochloa villosa
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Latest revision as of 18:56, 11 May 2021

Plants annual; loosely tufted or sprawling. Culms 7-50 cm, geniculate, decumbent to prostrate at the base, often much-branched below, usually rooting at the nodes; nodes pubescent; Sheaths usually pubescent, sometimes densely so, rarely glabrous, margins ciliate; ligules 0.3-1.1 mm, blades 1-7 cm long, 2-9.3 mm wide; usually densely puberulous on both sides, margins basally ciliate or scabrous. Panicles (1.5)4.5-8 cm long, with 4-12 spikelike primary branches in 2 ranks; primary branches 0.7-3.3 cm, axes 0.2-0.3 mm wide, triquetrous, pubescent; secondary branches rarely present, pedicels shorter than the spikelets. Spikelets 2-2.8 mm, solitary (or paired), in 1 row, appressed to the branch axes. Glumes separated by about 0.3 mm; lower glumes 0.7-1.5 mm, 1/3 – 1/2 as long as the spikelets, 3-veined; upper glumes glabrous or pubescent; 5-veined, lower florets sterile; lower lemmas similar to the upper glumes; lower paleas present; upper lemmas 1.8-2.1 mm, granulose to rugulose, acute, mucronate; anthers 0.9-1.3 mm. 2n = 36.

Discussion

Urochloa villosa is a tropical African and Asian species that Reed (1964) reported collecting from chrome and iron ore piles in Newport News, Virginia in 1959. His voucher specimens, acquired by the Missouri Botanical Garden in 2001, were not available for examination prior to publication of this volume, so the description is from Veldkamp (1996) and Clayton and Renvoize (1982). No additional collections have been reported in the Flora area.

Selected References

None.

Lower Taxa

None.