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Published In: Prodromus Florae Novae Hollandiae 179. 1810. (Prodr.) Name publication detailView in BotanicusView in Biodiversity Heritage Library

Project Name Data (Last Modified On 7/9/2009)
Acceptance : Accepted
Project Data     (Last Modified On 8/6/2009)


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54. Glyceria R. Br. (manna grass)

Plants perennial, usually with rhizomes, forming clumps or large colonies. Flowering stems glabrous, often horizontal at the base and rooting at the lower nodes. Leaf sheaths glabrous or roughened. Leaf blades flat or folded at maturity, glabrous or roughened. Spikelets ovate to linear in outline, circular in cross‑section or flattened, disarticulating above the glumes and between the florets, with 3–16 fertile florets with tips at different levels, the sterile, terminal floret appearing similar in size and shape to the fertile florets. Glumes 1‑nerved, glabrous, unequal in size. Lemmas strongly 5‑ or 7‑nerved, awnless, glabrous, roughened, or less commonly hairy. Paleas about as long as or longer than the lemmas. Stamens 2 or 3. Fruits elliptic in outline, slightly flattened, with a shallow, longitudinal groove near the base, usually reddish brown to dark brown. Thirty‑five to 40 species, North America, Europe, Asia, Australia.

Other species treated under Glyceria by Steyermark (1963) have since been reclassified in the genera Puccinellia Parl. and Torreyochloa G.L. Church (both in the tribe Poeae). They differ most notably in having open sheaths and 3‑nerved upper glumes. The seeds of some European species of Glyceria are used for fodder and also ground into a flour for human consumption. All of the species are important sources of food for waterfowl and other wetland fauna.


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1 Spikelets 2.0–4.5 mm long, ovate to oblong-ovate in outline 3 Glyceria striata
+ Spikelets 10–40 mm long, linear in outline (2)
2 (1) Lemmas tapered to a sharp point at the tip, 1.5–3.0 mm shorter than the paleas 1 Glyceria acutiflora
+ Lemmas rounded to bluntly pointed at the tip, less than 1 mm shorter than the paleas 2 Glyceria septentrionalis
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