Eragrostis riparia (Willd.) Nees, Fl. Bras. Enum. Pl. 2: 512 1829. (Syn: Eragrostis amabilis var. riparia (Willd.) E.G. Camus & A. Camus; Eragrostis riparia (Willd.) P. Beauv.; Eragrostis rubens var. riparia (Willd.) A.Camus; Eragrostis tenella var. riparia (Willd.) Stapf; Megastachya riparia (Willd.) Roem. & Schult.; Megastachya riparia (Willd.) Nees; Poa amboinica Retz.; Poa riparia Willd.);
Perennials. Culms densely tufted,10-30 cm long, geniculate; nodes glabrous. Leaves 2-8 x 0.2-0.4 cm, linear-lanceolate, base rounded, apex acuminate; sheaths to 3 cm long, slightly keeled; ligule a row of hairs. Panicles 3-6 cm long, contracted, spiciform. Sikelets 1.5-3 x 1-2 mm, oblong, 5-10-flowered, pale yellow. Lower glume c. 1 x 0.5 mm, ovate-lanceolate, 1-nerved. Upper glume c.1 mm long, ovate-lanceolate, 1-nerved. Lemmas 1-1.5 x 0.5-1 mm, ovate-oblong, apex rounded, 3-nerved. Paleas 1-1.5 x 0.5 mm, obovate or oblanceolate, 2-keeled, ciliate along the keels. Stamens 3. Ovary c. 0.5 mm long; stigma c.0.5 mm long. Grains c. 0.5 mm long, linear.
Flowering and fruiting: December-June
Grass for identification from a coastal area 130413MK01 : Attachments (3). 3 posts by 2 authors.
Please help me in identifying this Poaceae. The location is a sandy habitat, near coast.
Is this Eragrostis riparia ?
Place: near Pondicherry
Date: 13 May 2008
Yes it is.
ID171210phk2: Another grass for ID
At Akshi beach, Alibag
Just a wild guess: Cynosurus cristatus.
I think your guess is not so wild this is Cynosurus cristatus I had a specimen with me
This is one of the Eragrostis ciliaris complex, which includes E.coarctata, E.ciliaris, E.riparia, etc., all of which have dense, cylindrical, spicate inflorescence unlike other Eragrostis species.
Cynosurus cristatus is a European grass and in India is found only in temperate regions. In Cynosurus cristatus, the spikelets are in two rows only with larger florets. You can see plenty of its images on internet.
A similar post of Eragrostis riparia from Pondicherry is at https://groups.google.com/d/topic/indiantreepix/zUgjdWFK8Eg/discussion
The Plant List India Biodiversity Portal Encyclopedia of Life (Specimen) RBG Kew: GrassBase Description JSTOR Plant Science (Specimen)
Flora of Ranga Reddi District Andhra Pradesh, India By Thamminen Pullaiah, M. Silar Mohammed (Description & Keys)
Flora of Madhya Pradesh: Chhatarpur and Damoh By G. P. Roy, B. K. Shukla, Bhaskar Datt (Description & Keys)