Fimbristylis aestivalis Vahl, Enum. Pl. Obs. 2: 288 1805. (syn: Cyperus amane Siebold; Fimbristylis aestivalis var. aestivalis ; Fimbristylis aestivalis f. latifolia T.Koyama; Fimbristylis aestivalis subsp. major Trimen ex T.Koyama; Fimbristylis leiocarpa Maxim.; Fimbristylis tokyoensis Makino; Fimbristylis tricholepis Miq.; Fimbristylis trimenii Hook.f.; Iria aestivalis (Vahl) Kuntze; Isolepis schomburghii Steud.; Scirpus aestivalis (Vahl) Retz.; Scirpus leiocarpus (Maxim.) Meinsh.);
Tufted, non-rhizomatous annuals; culms 5-17 cm tall, trigonous. Leaves few, basal, 3-8 cm long, 0.5-1 mm wide, margins incurved, apex acuminate, sparsely pilose on both surfaces; sheaths 5-15 mm long, compressed, keeled, light brown, densely pubescent. Inflorescence laxly corymbose, 2-4 cm across, rays 3-7; leafy bracts 2-4 filiform, the longest upto 7 cm long. Spikelets solitary, 2.5-6 x 1-1.5 mm, oblong, acute, greenish-brown. Glumes spiral, c. 1 x 0.7 mm, ovate, yellow-brownish, keeled, keel green, excurrent to straight or recurved cusp. Stamen 1; anther oblong. Style linear, flat, pyramidally thickened at base; stigmas 2. Nut c. 0.5 mm long, obovate, yellowish.
Flowering and fruiting: January-April
Degraded deciduous forests and paddy fields, also in the plains
Asia and Australia
(Attributions- Dr. N Sasidharan (Dr. B P Pal Fellow), Kerala Forest Research Institute, Peechi
from India Biodiversity Portal )
Photographed today (13.6.15) on the bank of a pond.
I may be wrong assuming the id. However, I think three species look similar – F. dichotoma, F. bisumbellata and F. aestivalis.
I have uploaded similar looking sedges before. This one is the smallest and has the narrowest leaves. It appears to me (and again, I may be wrong) that this is more close to http://www.biolib.cz/en/taxon/id203030/ than to http://www.wildflowers.co.il/english/plant.asp?ID=2112