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Carex sect. Phyllostachyae Tuck. ex Kük. Search in IPNISearch in NYBG Virtual HerbariumSearch in SEINetAfrican Plants, Senckenberg Photo GallerySearch in Living Collections Decrease font Increase font Restore font
 

Published In: Das Pflanzenreich IV. 20(Heft 38): 642. 1909. (18 May 1909) (Pflanzenr.) Name publication detail
 

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

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24. Section Phyllostachyae (Tuck.) L.H. Bailey

Plants monoecious, without rhizomes, forming dense tufts or clumps. Vegetative stems present (actually false stems composed nearly entirely of a series of overlapping leafsheaths), leafy. Flowering stems erect or arched, weak and slender, somewhat widened just below the inflorescence, sharply trigonous, roughened on the angles toward the tip, glabrous, light brown at the base. Leaves basal or nearly so, mostly longer than the stems, dark green, glabrous, the lowermost leaves reduced to nearly bladeless sheaths, the partially degraded remains of the previous year’s leaves persistent, light brown. Leaf sheaths with the tip truncate to slightly convex, the ventral surface thin, green to white, the ligule wider than long and U-shaped, the lowermost sheath bases light brown. Inflorescences with 1–3 spikes, the uppermost terminal, the others basal ornearly so, on long, slender stalks, the inflorescence lacking bracts (except for the bractlike, pistillate scales). Spikes all alike, staminate toward the tip and pistillate toward the base. Pistillate portion of the spikes with 2–9 perigynia, the lowermost 1 or 2 scales 15–50 mm long and leaflike, the uppermost reduced, white-margined and sometimes awned. Perigynia 2-ribbed but otherwise nerveless, the main body circular to elliptic-obovate in outline, circular in cross-section, narrowed abruptly to a thick, stalklike base, tapered abruptly at the tip into a more or less trigonous beak as long as or somewhat longer than the main body, green, glabrous. Styles withering during fruit development, jointed to the main body of the fruit, which is not beaked at maturity. Stigmas 3.

Eight species, U.S., Canada.

 

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1 Spikes with 2–4 perigynia; perigynia with the main body circular to broadly elliptic-obovate in outline; staminate scales truncate at the tip 102 Carex jamesii
+ Spikes with (3)4–9 perigynia; perigynia with the main body elliptic-obovate in outline; staminate scales rounded to pointed at the tip 103 Carex willdenowii
 
 
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