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Key to families | Table of families and genera
2. Spikelets 1–4 per inflorescence branch; branch axis prolonged beyond terminal spikelet node generally > 5 mm; inflorescence branches deciduous in fruit, spikelets 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 lemma 2-lobed, central awn from sinus; base of middle or, if only 2 florets, upper floret hairy-tufted ..... B. barbata var. barbata
3' Tip of lower floret lemma tapered 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 internodes 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)
Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
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