Jepson eFlora
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 spikelets in each cluster with a staminate terminal floret

2. Perennial herb; fertile spikelet surrounded by 6–7 staminate (or sterile) spikelets; panicle ovate; sterile lemma 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 bisexual terminal floret

3. Glume keels not or narrowly winged

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

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

5. Panicle lanceolate, branched, lobed, occasionally ± 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 wing entire to irregularly toothed, sterile lemma 1, 0.3–1.5 mm, awl-like ..... P. minor

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

7. Glumes scabrous; panicle narrowly cylindric, base truncate, 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


Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, [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].
We encourage links to these pages, but the content may not be downloaded for reposting, repackaging, redistributing, or sale in any form, without written permission from The Jepson Herbarium.