Fuirena scirpoidea |
Fuirena bushii |
|
---|---|---|
southern umbrella-sedge |
Bush's umbrella-sedge |
|
Habit | Herbs perennial, rhizomatous, 20–60 cm, glabrous; rhizomes elongate, often forking, scaly; corms absent. | Herbs perennial, pubescent, to 1 m; rhizomes elongate, slender; corms present. |
Culms | spaced along rhizome, erect, slender, wandlike, subterete, nodes swollen. |
1–several, then almost densely tufted, proximally smooth, distally hirsute. |
Leaves | mostly sheath; principal blades cusplike, thickened, rarely over 4 mm. |
principal blades linear to lance-linear, flat, 5–15 cm, glabrous or sparsely strigose or puberulent, margins proximally or entirely hispid-ciliate. |
Inflorescences | strictly terminal; spikelets 1 or 2–5, sessile in clusters, exceeding short-linear subtending bract. |
in clusters of terminal spikelets or from 1–2(–3) penultimate nodes, proximal involucral bract exceeding peduncle and cluster. |
Spikelets | ovoid to lance-ovoid, 7–10(–15) mm, apex blunt; fertile scales ovate to obovate, 2.5–3.5 mm, ciliate; mucro erect, 1/2 or less length of scale; median ribs mostly 5. |
ovoid to cylindric, 10–15(–20) mm; fertile scales 3–3.5 mm; cusp excurved, equal to length of scale; median ribs 3, strong. |
Flowers | perianth bristles equaling or slightly longer than perianth stipes, retrorsely barbellate; perianth blades ovate, as long as claws, 2–2.5 mm, base thinner, 3-ribbed, apex compressed-conic, apiculate; anthers linear-oblong, 2 mm. |
perianth bristles incurved, mostly shorter than perianth stipes, mostly smooth; perianth blades short-oblong, ± as long as stipes, apex acute, strongly incurved, tumid distally, sometimes apiculate; anthers 3, 1–1.3 mm. |
Achenes | body angles pale, wirelike, faces lustrous red-brown or chestnut brown, 1 mm; beak narrow, linear, distally papillate or scabridulous. |
body angles wirelike, faces lustrous brown to red-brown, 1 mm; beak linear, hispidulous at dilated tip. |
2n | = 46. |
= 46. |
Fuirena scirpoidea |
Fuirena bushii |
|
Phenology | Fruiting summer–fall. | Fruiting summer–fall. |
Habitat | Sands and peats, inner edges of brackish marsh, interdunal swales, mostly along seacoast | Acid bogs or seeps, flatwoods and savanna |
Elevation | 0–100 m (0–300 ft) | 0–200 m (0–700 ft) |
Distribution |
AL; FL; GA; LA; MS; TX; West Indies (Cuba)
|
AR; LA; OK; TX |
Discussion | Plants of the Gulf Coastal Plain and the Ozarks from Louisiana and Arkansas southwestward have the cormose parts of the rhizome often separated by distinct intervals of narrow internode longer than the corm width. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 23, p. 34. | FNA vol. 23, p. 35. |
Parent taxa | Cyperaceae > Fuirena | Cyperaceae > Fuirena |
Sibling taxa | ||
Synonyms | Scirpus scirpoideus, Vaginaria richardii | F. ciliata |
Name authority | Michaux: Fl. Bor.-Amer. 1: 38, plate 7. (1803) | Kral: Sida 7: 331. (1978) |
Web links |