Ischaemum muticum

Ischaemum muticum L., Sp. Pl. 1049 1753. (syn: Agrostis javanica Burm. ex Kunth [Invalid]; Andropogon cymbachne Hack.; Andropogon muticus (L.) Steud., nom. illeg.; Andropogon polymorphus Steud.; Andropogon relictus Steud.; Andropogon repens Steud.; Cymbachne alata P.Beauv., nom. superfl.; Cymbachne ciliata Retz.; Ischaemum glabratum J.Presl; Ischaemum involutum Labill. ex Kunth [Invalid]; Ischaemum muticum var. aristuliferum Fosberg & Sachet; Ischaemum muticum var. muticum ; Ischaemum muticum var. srilankense Davidse; Ischaemum repens Roxb.; Rottboellia cymbachne Willd., nom. superfl.; Tripsacum ischaemum Raspail; Tripsacum muticum (L.) Raspail);

Trop. Asia to Japan and W. Pacific: Andaman Is., Bangladesh, Bismarck Archipelago, Borneo, Cambodia, Caroline Is., Christmas I., Cocos (Keeling) Is., India, Jawa, Laccadive Is., Lesser Sunda Is., Malaya, Maldives, Maluku, Myanmar, Nansei-shoto, New Caledonia, New Guinea, Nicobar Is., Philippines, Queensland, Solomon Is., Sri Lanka, Sulawesi, Sumatera, Taiwan, Thailand, Vanuatu, Vietnam as per POWO;

Andaman Is.; Bangladesh; Bismarck Archipelago; Borneo; Cambodia; Caroline Is.; Christmas I.; Cocos (Keeling) Is.; India; Japan; Jawa; Laccadive Is.; Lesser
Sunda Is.; Malaya; Maldives; Maluku; Myanmar; Nansei-shoto; New Caledonia; New Guinea; Nicobar Is.; Philippines; Queensland; Solomon Is.; Sri Lanka; Sulawesi; Sumatera; Taiwan; Thailand; Vanuatu; Vietnam as per Catalogue of Life;

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Stoloniferous perennial herbs, culms 30-50 cm high, slender, creeping or erect; nodes glabrous. Leaves 4-12 x 0.3-0.6 cm, lanceolate or elliptic-lanceolate, lower ones narrowed and tapering towards base, upper ones rounded or shallowly cordate, glabrous, margins minutely serrulate; sheaths 4-10 cm long, longer than the internodes, striate, glabrous; ligule 2-4 mm long, an ovate acute membrane. Inflorescence of 2 racemes, 4-8 cm long, slender, glabrous. Joints of racemes 4-4.5 x 1.75-2 mm, turbinate, coriaceous, smooth, glabrous. Sessile spikelets 5.5-6 x 1.75-2 mm, oblong-lanceolate, unawned, callus glabrous; lower glume 5-5.5 x 1.75-2 mm, oblong-lanceolate, coriaceous below, subcoriaceous above, faintly 11-13 nerved, margins narrowly inturned, scabrid towards apex, glabrous elsewhere; upper glume 5-5.5 x 1.5-2 mm, boat-shaped, lanceolate when spread, sharply keeled, minutely winged at apex, coriaceous, faintly 3-5 nerved; lower floret male; lemma 5-6 x 1-1.5 mm, lanceolate, shortly acuminate, delicate, hyaline, faintly 3-5 nerved, margins inturned, glabrous; palea 4.5-5 x 1-1.5 mm, lanceolate, delicate, hyaline, 2-keeled, 2-nerved, glabrous; lodicules 2, each 0.75-1 x 0.3-0.4 mm, oblong or obovate, 2-horned at apex; stamens 3, anthers 1.5-2 mm long, filaments short; upper floret bisexual; lemma 4.5-5 x 1.5-2 mm, entire or very rarely notched, ovate-lanceolate, faintly 5 nerved, median nerve prominent and prolonged into a rudimentary awn when it is notched, lobes acuminate, longer than the rudimentary awn, delicate, hyaline, sprinkled with wart like outgrowths in the upper half, smooth and glabrous elsewhere; lodicules and stamens more or less similar to that of the lower floret; ovary c. 0.5 x 0.25 mm, oblong, styles 1.5-2 mm long, slender, stigmas 0.75-1 mm, long, feathery; pedicelled spikelet 5-5.5 mm long, oblong-acute, unawned; pedicels c. 1 mm long, clavate, glabrous; lower glume 5-5.5 x 1.75-2 mm, ovate-acute, narrowly winged on one margin, wing scaberulous, coriaceous, smooth and glabrous, faintly 11-13 nerved, margins inturned; upper glume 4.5-5 x 1-1.5 mm, lanceolate, keel rounded, coriaceous, smooth and glabrous; florets similar to that of sessile spikelets.

(Attributions- Dr. N Sasidharan (Dr. B P Pal Fellow), Kerala Forest Research Institute, Peechi from India Biodiversity Portal)
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SK 2454 13 February 2020 : 8 posts by 2 authors. 4 images- 5 to 6 mb each.

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Stenotaphrum dimidiatum (L.) Brongn.??

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Ischaemum muticum

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References:
POWO  Catalogue of Life  The Plant List Ver.1.1  World Flora Online  WCSP  IPNI India Biodiversity Portal  IBIS Flora  Kerala plants  Useful Tropical Plants  urban forest  WSSA  DNA