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

Key to Phalaris

View taxon page for Phalaris

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

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

1. Spikelets in clusters, lower 4–7  in each cluster with a staminate terminal floret

2. Perennial herbfertile  surrounded by 6–7 staminate (or sterile) spikelets;  sterile  0.5–0.7 mm ..... P. coerulescens

2' Annual; fertile spikelet surrounded by 5–6 abortive, club-shaped spikelets; panicle generally obovate; sterile lemma 0.2–0.4 mm ..... P. paradoxa

1' Spikelets borne singly, all spikelets with a  terminal floret

3. Glume keels not or narrowly winged

4. Annual; fertile lemma  to ovoid, hairy except tip, tip ± beaked ..... P. lemmonii

4' Perennial herb; fertile lemma lanceolate, tip , ± sparsely hairy

5. Panicle lanceolate, branched, lobed, often ± purple; glumes 4–5 mm; fertile lemma 2.5–4 mm, sterile lemma 1.5–2 mm ..... P. arundinacea

5' Panicle generally ovoid, not lobed, ± purple; glumes generally 6–8 mm; fertile lemma 3.5–5 mm, sterile lemma 2.5–3.5 mm ..... P. californica

3' Glume keels broadly winged

6. Keel   to irregularly toothed, sterile lemma 1, 0.3–1.5 mm, awl-like ..... P. minor

6' Keel wing entire, sterile  generally 2, up to 4 mm, not awl-like

7. Glumes scabrous; panicle narrowly , base , occasionally interrupted, fertile lemma generally 2–3.5 mm ..... P. angusta

7' Glumes glabrous to hairy, not scabrous

8. Perennial herb; glumes generally 4–5 mm ..... P. aquatica

8' Annual; glumes generally (4)6–10 mm

9. Sterile lemmas 1/5 fertile lemma, ± fleshy to corky ..... P. brachystachys

9' Sterile lemma 1/2 fertile lemma, not fleshy

10. Sterile lemma scale-like, 2–4 mm ..... P. canariensis

10' Sterile lemma feathery, 1.5–2 mm ..... P. caroliniana


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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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