Bulbostylis ciliatifolia

(Elliott) Fernald

Rhodora 40: 391. 1938

Synonyms: Isolepis ciliatifolius (Elliott) TorreyStenophyllus ciliatifolius (Elliott) C. Mohr
Basionyms: Scirpus ciliatifolius Elliott
Treatment appears in FNA Volume 23. Treatment on page 134. Mentioned on page 132, 133.
Herbs, annual or perennial, cespitose, slender. Culms to 40 cm, wiry. Leaves ¼–1/2 length of culms; sheaths stramineous to tan or brown, glabrous or scabrid on ribs; blades spreading to ascending, filiform, 0.5 mm wide, involute, margin glabrous or scabrid, abaxially glabrous or hirtellous. Inflorescences terminal, in simple or compound anthelae; scapes wiry, coarsely ribbed, glabrous or strumose-puberulent; longer primary involucral bracts with setaceous blades exceeding or exceeded by inflorescence. Spikelets red-brown to dark brown, lanceoloid to cylindric, longer than wide, 2–6 mm; fertile scales broadly ovate, keeled, 1–1.3 mm, apex acute, abaxially puberulent, midrib included or excurrent as mucro. Flowers: stamens 2–3; anthers narrowly oblong, 0.8–1 mm. Achenes mostly waxy gray, trigonous, obovoid, 0.8–1.5 mm, faces evenly papillate, finely rugulose or level; tubercle a small, dark, compressed-conic button.

Distribution

V23 211-distribution-map.jpg

North America, West Indies (Cuba).

Discussion

Varieties 2 (2 in the flora).

References

None.

Key

1 Plants annual, 10–20(–30) cm; scapes mostly 0.5 mm diam.; anthelae mostly simple, open; longest involucral bract shorter than inflorescence; fertile scales dark red-brown or dull brown. Bulbostylis ciliatifolia var. ciliatifolia
1 Plants perennial, 15–40 cm; scapes mostly 0.5–0.7 mm diam.; anthelae mostly compound, open or dense; proximalmost involucral bract longer than inflorescence; spikelets red brown or pale brown. Bulbostylis ciliatifolia var. coarctata