Cyperus javanicus


Andaman Is.; Bangladesh; Bismarck Archipelago; Borneo; Cambodia; Caroline Is.; China Southeast; Christmas I.; Cocos (Keeling) Is.; Cook Is.; Fiji; Gilbert Is.; Hainan; Hawaii; India; Jawa; Kazan-retto; Laccadive Is.; Lesser Sunda Is.; Line Is.; Madagascar; Malaya; Maldives; Maluku; Marianas; Marshall Is.; Myanmar; Nansei-shoto; Nauru; New Guinea; Nicobar Is.; Niue; Northern Territory; Ogasawara-shoto; Philippines; Phoenix Is.; Pitcairn Is.; Queensland; Samoa; Seychelles; Society Is.; South China Sea; Sri Lanka; Sulawesi; Sumatera; Taiwan; Thailand; Tokelau-Manihiki; Tonga; Tuamotu; Vietnam; Wallis-Futuna Is.; Western Australia as per Catalogue of Life;


Erect, tufted perennials with short rhizome; culms 40-85 cm tall, obtusely trigonous, glaucous-green. Leaves many, 45-100 x 0.5-1.3 cm, linear, gradually acuminate, scabrid on margins and midrib, coriaceous, glaucous-green; sheaths 5-12 cm long, basal ones dark brown. Inflorescence large, compound, 7-15 x 8-20 cm; primary rays 6-12; leafy bracts 5-7, the lower ones much exceeding the corymb, the longest upto 70 cm long. Spikelets densely spicate, 4-7 x 1.5-3 mm, oblong-lanceolate, acute, straw-coloured. Glumes distichous, 2.5-3.5 x 2-2.5 mm, broadly ovate, apex acute, subcoriaceous, keel greenish, pale brown, margins white hyaline, basal 2 glumes empty. Stamens 3. Stigmas 3. Nut 1-1.5 x 0.5-1 mm, obovate, trigonous, black-brown.
Flowering and fruiting: Throughout the year
Marshy areas in degraded forests and mangrove forests, also in the plains
Pantropical
(from India Biodiversity Portal on 10.8.17)


https://08511630493324166816.googlegroups.com/attach/b7c764f7ed2e8/IMG-20170718-WA0040.jpg?part=0.1&view=1&vt=ANaJVrFv-offZ4iIkcoNEviAeWQKafryqNRS_JFm1vFri_aQEgj_DxBbj8ayZM3NAAcTbaJMdraqOkKwRMOIkwEqEVG1xeJcD41-sF32eeXy2ep5QqBAKyM
 
ID KANNUR 29 : 4 posts by 2 authors. Attachments (1)
Please identify this grass from Kannur District of Kerala. It grows in large patches in paddy fields. Inflorescence is coriaceous and strong.

Cyperaceae member. 
Cyperus javanicus Houtt.
 
 
https://lh6.googleusercontent.com/proxy/GEjzxIDNRt9g3b6Dsor7qsDglHEywlZpN50CWsoif3MahIVopkrkcwLlAgp_dgCNV6dEWcUpIo2PKVB1-C1S875k68Mjr8bhQwAccORto8L9QHg=w5000-h5000

Nagla forest ... part of Sanjay Gandhi National Park
Elevation range: sea level to about 600 ft asl ... January 7, 2018
Found these clumps of grass near to mangroves. Will be glad if such long shot pictures provide any hints to genus level?
To download / view original size photo, please click on pictures to reach their photo pages.

It is not a grass genus, but a sedge belonging to family Cyperaceae

The plant is in vegetative condition, but looks like Cyperus javanicus.

 
https://08511630493324166816.googlegroups.com/attach/b4f9c03f956c7/IMG_20181120_110551.jpg?part=0.1&view=1&vt=ANaJVrGOl2ypJlk4EQXCYMnPcKzZD9Kd4iT19ycupSwgz7C-1CUTSZo7bGX_vqHyfGxBzz663IbgsRRRAUAO9_E6539w9TKH9MwnMC09CnboS3tE31IuMOM
https://08511630493324166816.googlegroups.com/attach/b4f9ad43de679/IMG_20181120_110555.jpg?part=0.1&view=1&vt=ANaJVrGCOleHHsl03A9667_8NU1q-WcRpg16i-RSCqROU4RVLRTGtMcuc1KQJbP9Uc7Zzp9Ca965-dbnEP2F93mfzQJqoHioPplFNkMXsAeOoPhW-HIf1RM

Fwd: Grass id from Bangladesh _sm_30010 : 8 posts by 3 authors. Attachments (1)- 3 mb  
Location : Chera Deep, Saint Martin Island, Bangladesh
Fruiting : November
Photo taken : Nov, 2018

Attachments (1)- 7 mb   

Cyperus sp. 
Cyperaceae.

Pl. check comparative images at 

Cyperus javanicus to me



Comments