Jepson eFlora: Key page
Vascular Plants of California
Key to families | Table of families and genera

Key to Bouteloua

View taxon page for Bouteloua

(For a list of species in Bouteloua, use the above link.)

Jepson Manual glossary definitions can be seen by moving your cursor over words underlined with dots.

1. Annual

2. Spikelets 1–4 per inflorescence branch; branch axis prolonged beyond terminal   generally > 5 mm; inflorescence branches deciduous in fruit falling with branch ..... B. aristidoides var. aristidoides

2' Spikelets > 6 per inflorescence branch; branch axis terminated by spikelet; inflorescence branches persistent, spikelet axis breaking between glumes and lower floret

3. Tip of lower floret  2-lobed, central  from ; base of middle or, if only 2 , upper floret hairy-tufted ..... B. barbata var. barbata

3' Tip of lower floret lemma  to central awn; base of upper floret glabrous ..... B. trifida (2)

1' Perennial herb – rhizomes or stolons sometimes present

4. Inflorescence branches 13–60, deciduous in fruit, spikelets falling with branch ..... B. curtipendula

4' Inflorescence branches < 8, persistent in fruit, spikelet axis breaking between glumes and lower floret

5. Lower stem  hairy; inflorescence branch axis slightly prolonged beyond terminal spikelet node ..... B. eriopoda

5' Lower stem internodes glabrous or minutely scabrous; inflorescence branch axis terminated by fertile or vestigial spikelet

6. Base of middle or, if only 2 florets, upper floret hairy-tufted; tip of lower floret lemma 2-lobed, central awn from sinus ..... B. gracilis

6' Base of upper floret glabrous; tip of lower floret lemma tapered to central awn ..... B. trifida (2)


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Citation for the whole project: Jepson Flora Project (eds.) . Jepson eFlora, [accessed on ]

Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on .

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