Cyperus alulatus

Cyperus alulatus J.Kern, Reinwardtia 1: 463 1952.;

Both looks very similar. Identity can be confirmed by checking the specimens.
Rachis of spikes glabrous and keel of the glumes smooth (not spinulose ciliate) .............. C. iria
Rachis of spikes hispid on angles and keel of the glumes spinulose ciliate ....................... C. alulatus   

Spikes finally reflexed; glumes 1.5-2 mm..... Cyperus alulatus
Spikes suberect; glumes 1-1.5 mm............. Cyperus iria



Cook (1996) reported the species as endemic to India, Nepal and Pakistan. He reported the distribution in Andhra Pradesh, Himachal Pradesh, Gujarat, Jammu and Kashmir, Karnataka, Maharashtra, Orissa, Punjab and Rajasthan. It is common in all districts in Maharashtra (Lakshminarasimhan 1996). In Madhya Pradesh the species is reported from Balaghat, Damoh, Hoshangabad, Indore, Mandla, Ratlam, Satna, Sidhi, Tikamgarh and West Nimar in Madhya Pradesh. It is also seen in Bilaspur, Durg, Raipur and Surguja in Chhattisgarh (Verma 2001).
It is an annual herb growing around 30 cm in height (Lakshminarasimhan 1996). It is found in marshes, ditches and in rice fields. It is mostly found on hills and is not confined to wetlands.     

Cyprus alulatus Kern
An annual tufted herb of moist places, Photographed in Pench Tiger Reserve Seoni M.P. Please validate
It can be either Cyperus iria or C. alulatus, both are very similar. In Cyperus iria rachis of the spikes are glabrous and glumes not spinulose-ciliate on the keel
But in C. alulatus  rachis of the spikes are hispid on angles and glumes are often spinulose-ciliate on the keel. 

Yes Cyprus alulatus..

https://groups.google.com/group/indiantreepix/attach/2033f001788a0/Vasai,%20Poaceae%2024%208%202014.jpg?part=0.1&authuser=0&view=1
Poaceae, member for ID, Vasai, Maharashtra, Aug -14.
: 6 posts by 4 authors. Attachments (1)
Please identify this grass.
I Hope Cyperus alulatus
C. iria ?
It can be either Cyperus iria or C. alulatus. The inflorescence need to be examined with a lens or under a microscope  to confirm the identity.
Cyperus alulatus


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https://08511630493324166816.googlegroups.com/attach/b5159d69694d4/FB_IMG_1571328965645.jpg?part=0.3&view=1&vt=ANaJVrEqrKME8zDItaW3WpsttoVfxo1pH2QlQKzgWdoeXlipOv65uUahTBxjaFV9IGlQvf0n5R5l5bSLHPMPr_3oft8bo6FxUzyGIGl9R9CDxqiT83h1HBU
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https://08511630493324166816.googlegroups.com/attach/b5159d69694d4/FB_IMG_1571328981182.jpg?part=0.1&view=1&vt=ANaJVrHt5quyrrQVgCWESYr8GDN9syabtAUlaakT6FWmF_CSAJFX6IksKnPpx5pAA0kiFAwGXxnDeu_1rFGAA77M8D_ZhyK7-0veo4fIpZjdojq2MYoNB0E
Need help to identify this Cyperaceae : 6 posts by 3 authors. Attachments (4)
Need help to identify this Cyperaceae
Date: 16 October 19
Agra, U.P

Cyperus alulatus 
I found the keys as below: 
Spikes finally reflexed; glumes 1.5-2 mm..... Cyperus alulatus
Spikes suberect; glumes 1-1.5 mm............. Cyperus iria                                 

Cyperus iria spikelets hang loose, in C. alulatus they are always stiff, perpendicular to the axis/ rachis ...both pretty common in Surat. 
C. alulatus can be seen 15 cm to 100 cm tall bearing spikes, in C. iria I am yet to see a less than 30 cm plant with spike.  
  

 
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