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Published In: Botanical Gazette 21(1): 6. 1896. (Bot. Gaz.) Name publication detailView in BotanicusView in Biodiversity Heritage Library
 

Project Name Data (Last Modified On 9/1/2009)
Acceptance : Accepted
Project Data     (Last Modified On 7/9/2009)
Status: Native

 

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89. Carex arkansana (L.H. Bailey) L.H. Bailey

Pl. 55 a–e; Map 205

Plants with poorly developed rhizomes, forming tufts or small clumps. Flowering stems 15–60 cm long, shorter than to mostly longer than the leaves. Leaf blades 2–25 cm long, 1.0–2.5 mm wide, green to light green. Leaf sheaths tight around the stem, the ventral side relatively firm and without cross-wrinkles, usually remaining intact at maturity, the dorsal side green, lacking white areas or mottling, the ligule wider than long and U-shaped. Inflorescence mostly elongate, the 3–6 spikes easily distinguished, at least the lowermost well separated along the axis, the uppermost sometimes densely overlapping, the lowermost bracts 50–250 mm long, more than twice as long as the inflorescence, hairlike with the basal portion somewhat broadened. Spikes 6–12 mm long, 7–12 mm wide, with 8–20 ascending to mostly spreading perigynia, the scales 2.0–3.5 mm long, shorter than to about as long as the perigynia, ovate, the tip tapered to a sharp point and often short-awned. Perigynia 3.3–4.0 mm long, 2.3–3.0 mm wide, 1.5–2.0 times as long as wide, elliptic-ovate in outline, the tip with a short beak with minutely toothed or roughened margins, the base rounded, the basal portion more or less thickened with corky to spongy tissue, light green, the ventral surface nerveless or with 2–4 faint nerves (sometimes somewhat wrinkled), the dorsal surface nerveless. Stigmas relatively short, slender, mostly straight. Fruits 1.5–2.2 mm long, ovate to nearly circular in outline. May–June.

Uncommon in widely scattered counties in the southern third of the state and disjunctly in north-central Missouri (Missouri, Illinois, Kansas, Arkansas, Oklahoma, and Texas). Bottomland prairies and moist depressions of upland prairies; less commonly in openings of mesic upland forests; also in disturbed grassy areas and along roadsides.

 
 


 

 
 
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