Carex inversa R.Br.

Knob sedge (en)

Species

Angiosperms > Poales > Cyperaceae > Carex

Characteristics

Rhizomatous; very variable in size, flaccid, bright green, forming a matted sward. Rhizome long-creeping, to 2 mm. diam., covered by closely appressed brown scales or their fibrous remains; shoots ± distant, singly from the rhizome, c. 1 mm. diam. at base including basal sheaths. Culms (2)–8–30–(45) cm. × c. 0.5–1 mm., weak, smooth, green, obtusely trigonous; basal sheaths pale brown almost cream. Lvs < mature culms, 0.5–1.5 mm. wide, channelled to flat, soft, grasslike, margins us. smooth or very minutely scabrid towards tip. Infl. a pale green or bright green ovate head, c. 1 cm. long, of 2–5 closely packed ± sessile spikes, or occ. 1–2 spikes distant from the rest; bracts subtending infl. and lower spikes green and lfy, much longer than infl. Spikes androgynous, 4–8 mm. long, male fls 1–3 at base of spikes, occ. 0. Glumes < utricles, ovate, acuminate, white or pale brown, with a green, faintly scabrid keel. Utricles 3–3.5 × c. 1.5 mm., plano-convex, ovoid, elliptical, distinctly nerved on convex face, light greenish brown; narrowed to a scabrid beak c. 1 mm. long; stipe slightly > 0.5 mm. long, pale cream. Stigmas 2. Nut c. 1.5 mm. long, plano-convex, broadly oblong, shortly stipitate, light to dark brown.
More
Very variable, forming a matted sward, 10-30 cm (or more) high, soft, grass-like, bright green; rhizome far-extending. Inflorescence a green ovate head ± 1 cm long. Spikes approximate, sessile, male flowers at base Stigmas 2.
Life form perennial
Growth form herb
Growth support free-standing
Foliage retention deciduous
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Root system rhizome
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Environment

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Hardiness (USDA) 7-11

Usage

Uses animal food
Edible -
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Cultivation

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Distribution

Carex inversa world distribution map, present in Australia, Norfolk Island, New Zealand, and United States of America

Identifiers

LSID urn:lsid:ipni.org:names:300341-1
WFO ID wfo-0000347769
COL ID 69BC8
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Carex inversa Vignea inversa Carex inversa f. major Carex paupera Carex rhytidocarpa Carex inversa var. costata Carex inversa var. leichardtii Carex inversa var. major Carex inversa var. minor Carex inversa var. perigynium Carex smaragdina