The green links below add additional plants to the comparison table. Blue links lead to other Web sites.
enable glossary links

densetuft hair-sedge, thread-leaf beakseed, tuft hair-sedge

Habit Herbs, annual, cespitose.
Culms

to 30 cm, bases soft.

Leaves

spreading to ascending, ¼–1/3 length of scapes;

sheath borders tan, backs prominently ribbed, glabrous;

blades filiform, 0.5 mm wide, involute, margins ciliate-scabrid, surface glabrous.

Inflorescences

solitary or more commonly in simple, open, rarely compact, involucrate anthelae;

scapes filiform (rarely with several spikelets sessile or subsessile at plant base), prominently ribbed, glabrous;

proximalmost involucral bract cuspidate or setaceous bladed, exceeding or exceeded by inflorescence.

Spikelets

red-brown, ovoid to lanceoloid, 3–5 mm;

fertile scales ovate, 1.5–2 mm, apex acute, glabrous or distally puberulent, keel prominent, short-excurrent.

Flowers

stamens (1–)2;

anthers oblong-elliptic, 0.5–0.7 mm.

Achenes

yellowish to pale brown, trigonous-obovoid, 1 mm, faces rugose.

2n

= 84.

Bulbostylis capillaris

Phenology Fruiting summer–fall.
Habitat Sandy savanna, prairie, arenaceous outcrops, sandy or gravelly waste areas
Elevation 0–3000 m [0–9800 ft]
Distribution
from FNA
AL; AR; AZ; CA; CT; DC; DE; FL; GA; IA; IL; IN; KS; KY; LA; MA; MD; ME; MI; MN; MO; MS; NC; NE; NH; NJ; NM; NY; OH; OK; PA; RI; SC; TN; TX; VA; VT; WI; WV; NB; NS; ON; QC; Mexico; Central America; South America; West Indies; Asia; Pacific Islands
[WildflowerSearch map]
[BONAP county map]
Discussion

A specimen of Bulbostylis capillaris collected by E. Hall (585) gives Oregon without a specific locality.

Bulbostylis capillaris is distributed over a broad range of physiographic types and occurs in many forms, the most distinctive of ours being var. crebra, which has, in addition to numerous longscaped anthelae, large numbers of spikelets at the plant base.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 23, p. 136.
Parent taxa Cyperaceae > Bulbostylis
Sibling taxa
B. barbata, B. ciliatifolia, B. funckii, B. juncoides, B. schaffneri, B. stenophylla, B. warei
Synonyms Scirpus capillaris, B. capillaris var. crebra, B. capillaris var. isopoda, Fimbristylis capillaris, Isolepis brachyphylla, Isolepis capillaris, Isolepis radiciflora, Scirpus brachyiphyllus, Scirpus muhlenbergii, Stenophyllus capillaris
Name authority (Linnaeus) C. B. Clarke: in J. D. Hooker, Fl. Brit. India 6: 652. (1893)
Web links