Fimbristylis cymosa

Fimbristylis cymosa R.Br., Prodr. Fl. Nov. Holl. 228 1810. (Syn: Fimbristylis glomerata Boeck.; Iria cymosa (R.Br.) Kuntze; Scirpus cymosus (R.Br.) Poir. [Illegitimate];                     Cyperus triceps (Rottb.) Endl.; Fimbristylis atollensis H.St.John; Fimbristylis biumbellulata Boeckeler [Illegitimate]; Fimbristylis capitata Sieber ex C.Presl [Illegitimate]; Fimbristylis capitulifera Merr.Fimbristylis ciliolata Steud.; Fimbristylis cymosa var. multifolia Domin ...; Fimbristylis formosensis C.B. Clarke; Fimbristylis glomerata (Schrad. ex Schult.) Nees; Fimbristylis glomerata (Schrad. ex Schult.) Urb. [Illegitimate]; Fimbristylis kankaoensis Hayata; Fimbristylis laevissima Steud.; Fimbristylis melanospora Fernald; Fimbristylis monini Steud.; Fimbristylis multifolia Boeckeler; Fimbristylis reunionis Steud.; Fimbristylis rigida Kunth; Fimbristylis sintenisii Boeckeler; Fimbristylis spathacea Roth .; Fimbristylis umbellatocapitata Steud.; Fimbristylis warburgii K.Schum. ex Warb.; Fimbristylis wightiana Nees; Iria glomerata (Schrad. ex Schult.) Kuntze; Iria multifolia (Boeckeler) Kuntze; Isolepis glomerata Schrad. ex Schult.; Isolepis haenkei J.Presl & C.Presl; Isolepis rigescens (Willd. ex Schult.) C.Presl; Isolepis schraderi A.Dietr.; Isolepis stricta (Roxb.) A.Dietr.;Kyllinga triceps Rottb.; Scirpus ciliolatus Boeckeler; Scirpus cymosus Lam.; Scirpus glomeratus Retz. [Illegitimate]; Scirpus rigescens Willd. ex Schult.; Scirpus strictus Roxb.);

Greyish green perennial, forming tight tufts, 10-20 cm. Stem rigid, terete to triangular, deeply grooved, smooth. Leaves less than half stem length; sheaths 1-2.5 cm, pale brown, lustrous, with wide scarious margins; blades 1-1.5 mm wide, stiff, slightly turgid, frequently falcate, involute or flat, margins barbed towards apex, apex short, frequently mucronate. Inflorescence compact or diffuse with elongate peduncles, of 10 or more solitary spikes, or, in compact inflorescences, spikes sessile and clustered; bracts usually short, margins scabrous; branches compressed or from triangular to terete. Spikes 2-5 x 1-2.5 mm, ovoid, more or less terete, greyish brown to brown; rachis articulate, castaneous brown, with prominent brown or colourless wings; glumes 1.8-2 x 1-1.2 mm, keeled, light brown, with green or pale mid-rib not reaching apex, margins widely scarious. Stamens 2; anthers 1.7-1.8 mm, with small basal lobes; style 1-1.2 mm, brown; stigmas 2 (or 3), ciliate, 0.4-0.5 mm. Nut c. 0.8 x 0.6 mm, ovoid, lenticular, slightly rugulose, dark brown.  
Flowering and fruiting: October-February 
Degraded moist deciduous forests and mangrove forests, also in the plains  
Hooghly - Good morning with cyperaceae : Attachments (6 + 4). 5 posts by 2 authors.
I understand that id is very very difficult with this couple of poor shots (due to continuous downpour and bad light), recorded yesterday, again in front of my school. Any suggestion at genus level?
Attaching new set, with mature spikes and more clear pictures, recorded on 31/8/13.
This might be a Scirpus sp.
You may like to agree with me that the ID of cyperaceae members are very very tough to accomplish. Cyperus is rather easier than Scirpus, Fimbristylis... etc. So, you have three options - 1) either to accept, or 2) reject, or 3) partly accept, suffixing one or more "?"!
Fimbristylis cymosa R.Br. SN Oct17 : 2 posts by 2 authors. Attachments (3). 
Fimbristylis cymosa R.Br, small sedge near moist places from the out skirts of Bangalore