Jepson eFlora
Key to families | Table of families and genera

Key to Sporobolus

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1. Annual; inflorescence 1–5 cm, terminal and axillary at ± most stem nodes; upper glume 2.5–5 mm; lemma leathery, tip beaked ..... S. vaginiflorus

1' Perennial herb; inflorescence 8–80 cm, generally terminal, sometimes axillary at some stem nodes; upper glume 0.5–3 mm; lemma membranous, tip obtuse to acute

2. Sheath collar with conspicuous hairs to 4 mm; glume back keeled, upper glume midvein ± scabrous at 20×

3. Lower 1° inflorescence branches generally < 2 cm, bearing 2° inflorescence branches and spikelets to near base ..... S. contractus

3' Lower 1° inflorescence branches > 3 cm, bearing 2° inflorescence branches and spikelets along upper 3/4, base naked

4. 2°, 3° inflorescence branches weakly spreading or appressed, ± obscure ..... S. cryptandrus

4' 2°, 3° inflorescence branches spreading, evident, entangled ..... S. flexuosus

2' Sheath collar glabrous or with sparse long hairs to 6 mm; glume back rounded, upper glume midvein ± smooth at 20×

5. Upper glume length < 0.6 × lemma, tip obtuse, minutely toothed; anthers 0.5–1.1 mm ..... S. indicus

5' Upper glume length > 0.6 × lemma, tip acute, entire; anthers 1.1–1.8 mm

6. Stem generally 3–10 dm, to ± 3 mm thick at base; 2° inflorescence branches spreading, bearing spikelets distally, base naked, 3° inflorescence branches spreading ..... S. airoides

6' Stem generally 9–25 dm, to ± 9 mm thick at base; 2° inflorescence branches weakly spreading or appressed, bearing spikelets to near base, 3° inflorescence branches appressed ..... S. wrightii

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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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