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This genus is accepted, and its native range is Oregon to California.
A specimen from Kew's Herbarium


Gilmour, C.N., Starr, J.R. & Naczi, R.F.C. 2013. Calliscirpus, a new genus for two narrow endemics of the California Floristic Province, C. criniger and C. brachythrix sp. nov. (Cyperaceae). Kew Bulletin 68: 85. DOI

Morphology General Habit
Herb cespitose, short-rhizomatous, perennial-Culms trigonous, (10 –) 19 – 110 cm × 0.6 – 3 mm, occasionally dentate near apex
Morphology Leaves
Leaves 3 – 6, basal and cauline, striate, 5 – 85 cm × 1 – 6 mm, distal leaf longer than sheath; leaf sheaths green or light brown at base, filamentose, dry and persistent
Morphology Leaves Ligules
Ligule fimbriate with hairs ≤ 0.6 mm
Morphology Reproductive morphology Fruits
Achenes 1.3 – 3 × 0.7 – 1.1 mm, dark brown, oblong-obovoid; embryo Carex-type.
Morphology Reproductive morphology Inflorescences
Inflorescences capitate; bracts 2 – 5, sheathless, scale-like, rarely green and large, sometimes mucronate, spikelets 5 – 30 or more, oblong-lanceoloid, in a dense ovoid to hemispheric head of 1 or more inconspicuous branches; floral scales brown, with pale green or brown markings, sometimes red-spotted, 1 – 3-ribbed centre, ovate, apex acute; flowers bisexual; perianth bristles 6 (– 12), 3 – 10 mm, dull white at anthesis, antrorsely barbed, deciduous at fruit maturity; stamens 3; anthers 1.2 – 2 mm long, white at anthesis; style deciduous, linear, 3-fid
Type: Calliscirpus criniger (A. Gray) C. N. Gilmour, J. R. Starr & Naczi.

Native to:

California, Oregon

Calliscirpus C.N.Gilmour, J.R.Starr & Naczi appears in other Kew resources:

First published in Kew Bull. 68: 98 (2012)

Accepted by

  • Govaerts, R., Nic Lughadha, E., Black, N., Turner, R. & Paton, A. (2021). The World Checklist of Vascular Plants, a continuously updated resource for exploring global plant diversity. Scientific Data 8: 215.


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© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families.