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Cyperus paniceus (Rottb.) Boeckeler, Linnaea 36: 381 1870. (Syn: Cyperus cariciformis F.Muell. [Illegitimate]; Cyperus paniceus var. queenslandicus (Domin) Kük.; Cyperus paniceus var. roxburghianus (C.B.Clarke) Kük.; Cyperus umbellatus Thwaites [Illegitimate]; Kyllinga panicea Rottb.; Kyllinga punicea J.F.Gmel.; Mariscus cariciformis F.Muell.; Mariscus paniceus (Rottb.) Vahl; Mariscus paniceus var. queenslandicus Domin; Mariscus paniceus var. roxburghianus C.B.Clarke; Mariscus pullu Steud.; Mariscus roxburghianus (C.B.Clarke) Alston; Mariscus wallichianus Kunth);
Flora of Eastern Karnataka, Volume 2 By N. P. Singh (1988- Keys– Mariscus squarrosus (syn. of Cyperus squarrosus L.), Mariscus dubius (syn. of Cyperus dubius Rottb.), Mariscus bulbosus (syn. of Cyperus clarkei T.Cooke), Mariscus paniceus (syn. of Cyperus paniceus (Rottb.) Boeckeler), Mariscus sumatrensis (syn. of Cyperus cyperoides subsp. cyperoides ))
Culms to 30 cm tall, smooth. Leaves 20-30 x 0.3-0.4 cm, glabrous. Umbel simple; spikes 3-6, each 1-1.5 x 0.6-0.8 cm, sessile. Spikelets 3-4 x 0.5-0.6 mm terete; glumes 4; lower two glumes smaller; third glumes 3 x 1.5 mm, lanceolate; fourth glumes 3.5 x 0.5 mm. Stamens 2. Nut 2.5 mm long, oblong acute, brown.
Flowering and fruiting: August-September
Degraded forest areas, wastelands and roadsides
Indo-Malesia
Cyperus paniceus is distributed in Australia, Myanmar, Bhutan, Sri Lanka, Bangladesh, Nepal, Pakistan and Thailand. In India it is reported from Arunachal Pradesh, Assam, Gujarat, Himachal Pradesh, Kerala, Karnataka, Maharasthra, Rajesthan, Sikkim, West Bengal (Cook 1996). In Uttar Pradesh (Endemic to Himalayas) (Mukarji et al. 2000), In Tamil Nadu (Chengalpattu, Coimbatore, Nilgiri, Madurai, North Arcot, Thiruchirapalli and Tirunelveli) (Henry et al.1987). In Madhya Pradesh (Mandla) (Singh et al. 2001). In Kerala it found in Kottayam, Palaghat, Quilon, Thiruvananthapuram. In Andra Pradesh it ocuurs in Chittoor, East Godavari, and Karimnagar (BSI, Coimbatore).
It grows in seasonally flooded places, marshes and roadsides (Cook 1996) and also in open grasslands (Henry et al. 1987).
(From IUCN Red List (LC) )
Hooghly : seems to be Cyperus paniceus (Rottb.) Boeckeler : Attachments (13). 3 posts by 2 authors.
Two taxa are to be considered for this plant, i think –
A blog on various cyperus that i often take help – http://vietnamplants.blogspot.in/2013/01/ho-lac-ho-coi-cyperaceae-phan-1.html.
Both the Cyperus cyperoides (L.) O. Kuntze and Cyperus paniceus (Rottb.) Boeckeler can be found in Central Bengal, while the first one can be seen in Assam (Bengal Plants & FBI).
I think this is Cyperus paniceus (Rottb.) Boeckeler.
I simply give up. It’s either C. paniceus (Rottb.) Boeckeler or C. cyperoides (L.) Kuntze.
Photographed today (26-Sept-2015) in Hooghly.
Cyperus cyperoides and allied species are often confusing, very difficult to identify. I think it can be treated as Cyperus cyperoides rather than var. roxburghianus (C.B. Clarke) Kuk. of C. paniceus With full respect to …, I beg to differ. Though C. cyperoides (L.) Kuntze can have a single floret in a spikelet, the 3rd glume would have 3 conspicuous green veins (ref. FoC), the same can be seen in Clarke’s illustration (no.6). Else there would be more than one floret and thereby nuts. In my species only middle nerve of the glume is green and conspicuous (as can be seen in the illustration no.2). So, I would rather go with C. paniceus (Rottb.) Boeckeler.
References:
The Plant List Annotated checklist of the flowering plants of Nepal (Mariscus paniceus (Rottb.) Vahl) India Biodiversity Portal IUCN Red List (LC) Flora of Eastern Karnataka, Volume 2 By N. P. Singh (1988- Keys- Mariscus squarrosus (syn. of Cyperus squarrosus L.), Mariscus dubius (syn. of Cyperus dubius Rottb.), Mariscus bulbosus (syn. of Cyperus clarkei T.Cooke), Mariscus paniceus (syn. of Cyperus paniceus (Rottb.) Boeckeler), Mariscus sumatrensis (syn. of Cyperus cyperoides subsp. cyperoides ))
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