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Published In: Enumeratio Plantarum . . . 2: 285. 1805. (Enum. Pl.) Name publication detailView in BotanicusView in Biodiversity Heritage Library

Project Name Data (Last Modified On 6/2/2011)
Acceptance : Accepted
Project Data     (Last Modified On 6/3/2011)
Synonym Text: Iria (Rich.) R. Hedw., Gen. Pl.: 360. 1806.
General/Distribution: A genus with c. 200 species, represented in Pakistan by 14 species.


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Small, soft annuals or perennials. Stem scapose. Leaves with or without ligule, upper, "cauline", leaves short or, sometimes, present as bladeless sheaths only. Bracts short or overtopping inflorescence. Inflorescence a multiple spike or anthelodium, of several to more than 50 spikes, primary branches each with basal tubular prophyll. Spikes solitary or geminate, seldom three together on a common peduncle; glumes spirally arranged, from several to 40 or more; rachis articulate, usually with scarious wings. Perianth bristles 0; stamens 1 - 3, seldom 0; stigmas 2 or 3; stylopodium articulating from nut, caducous. Nut lenticular or globose. Resembling Abildgaardia, but inflorescences with many more spikes; also resembling Bulbostylis, but mouth margin of sheaths not ciliate.

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1 (1) Stigmas 3, style not flat, usually glabrous. (1)
+ Stigmas 2, style flat, usually ciliate. (2)
2 (1) Ligule a fringe of short hairs. (2)
+ Ligule absent . (3)
3 (2) Annual; stem 0.6-0.8 mm diam.
+ Perennial; stem 2-3 mm diam. 1 Fimbristylis complanata
4 (4) Cauline leaves with well developed blades. (4)
+ Cauline leaves reduced to blade-less sheaths. (5)
5 (4) Stout perennials. (5)
+ Annual with fibrous roots. 5 Fimbristylis tenera
6 Rhizome short, upright. 3 Fimbristylis cymosa
+ Rhizome elongated, horizontal. 4 Fimbristylis falcata
7 Basal leaves with prominent midrib, not laterally compressed, adaxial side flat, wide. (8)
+ Basal leaves laterally compressed, without prominent midrib, adaxial side a narrow groove. 6 Fimbristylis miliacea
8 (7) Perennial, stem nearly terete, not deeply grooved. 8 Fimbristylis umbellaris
+ Annual, stem acutely 4-5-angled, deeply grooved. 7 Fimbristylis quinquangularis
9 (9) Ligule present as a fringe of short hairs. (9)
+ Ligule absent. (10)
10 (9) Nuts smooth or finely reticulate; upper half of glumes hairy or glabrous. (10)
+ Nuts trabeculate; glumes glabrous. (11)
11 (10) Glumes glabrous, glossy. 10 Fimbristylis schoenoides
+ Apical part of glumes tomentose. 9 Fimbristylis turkestanica
12 Spikes 2-4 mm wide, terete; glumes not keeled; style 2-4 mm long; nut 1-1.3 mm. 11 Fimbristylis dichotoma
+ Spikes 1-1.5 mm wide, angular; glumes keeled; style 0.75-1 mm; nut 0.6-0.7 mm. 12 Fimbristylis bisumbellata
13 Perennials; style base glabrous; spikes 1-5 mm wide; glumes not aristate. (14)
+ Annual; style base fringed with long, pendent hairs; spikes 1-1.5 mm wide; glumes aristate. 14 Fimbristylis squarrosa
14 (13) Rhizome upright, short; nut c. 0.8 x 0.6 mm. 3 Fimbristylis cymosa
+ Rhizome horizontal, short; nut c. 1.4 x 1.1 mm. 13 Fimbristylis rigidula
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