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Published In: Rhodora 46(546): 245. 1944. (Rhodora) 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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4. Rhynchospora globularis (Chapm.) Small var. recognita Gale (beaked rush)

Pl. 80 a, b; Map 302

Plants tufted. Aerial stems 20–90 cm long. Leaves basal and progressively reduced on the aerial stems, the leaf blade 4–40 cm long, 2–4 mm wide, flat. Inflorescences of 2 to several dense clusters of numerous spikelets. Spikelets 3–4 mm long, ovate to broadly elliptic in outline, mostly pointed at the tip, with 1–3 of the florets fertile. Spikelet scales 1.8–2.1 mm long, obovate with the midrib extended past the broadly rounded or shallowly notched tip as a minute, slender awn, light brown to dark brown. Perianth bristles 5–6, shorter than the fruits, with upwardly pointing barbs. Fruits with the tubercle 0.3–0.6 mm long, broadly triangular or depressed-conical with a distinctive raised basal margin, the main body 1.2–1.5 mm long, broadly obovate to broadly elliptic in outline, relatively turgid, the surface appearing horizontally wrinkled or ridged, with a secondary, fine pattern of vertical lines between the wrinkles, yellowish brown to reddish brown, usually shiny, somewhat iridescent. May–October.

Scattered in the southern third of the state (eastern U.S. west to Texas; Mexico, Caribbean Islands, Central America). Upland prairies, sandy or rocky stream banks, margins of sinkhole ponds, and open rocky or sandy areas.

Two other varieties occur in the southern portion of the species’ range. These differ from var. recognita in having inflorescences with less dense clusters of fewer spikelets or in the sculpturing of the achene surface.



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