Bulbostylis capillaris |
Bulbostylis barbata |
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bulbostyle capillaire, densetuft hair-sedge, thread-leaf beakseed, tuft hair-sedge |
old world hairsedge, watergrass |
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Habit | Herbs, annual, cespitose. | Herbs, annual, densely cespitose, scapose, low. |
Culms | to 30 cm, bases soft. |
5–20(–30) cm. |
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. |
to 2/3 length of scapes; sheaths greenish or tan, glabrous or hispidulous on ribs; blades spreading, filiform, 0.5 mm wide, involute, margins scabridulous. |
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. |
scapes filiform, coarsely few ribbed, to 0.5 mm thick; spikelets in terminal headlike, involucrate clusters, 1–1.5 cm wide; involucral bracts with setaceous blades rarely exceeding 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. |
red to red-brown or dull brown, lance-ovoid to lanceoloid or linearoblong; fertile scales lanceolate, keeled, 1.2–2.2 mm, glabrous, midrib excurrent as mucro. |
Flowers | stamens (1–)2; anthers oblong-elliptic, 0.5–0.7 mm. |
stamens 1; anthers oblong, 1 mm. |
Achenes | yellowish to pale brown, trigonous-obovoid, 1 mm, faces rugose. |
trigonous, obovoid, 0.5–0.6 mm, angles often sharp, faces flat or slightly concave, finely reticulate; tubercle a small button. |
2n | = 84. |
= 10. |
Bulbostylis capillaris |
Bulbostylis barbata |
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Phenology | Fruiting summer–fall. | Fruiting summer–fall. |
Habitat | Sandy savanna, prairie, arenaceous outcrops, sandy or gravelly waste areas | Moist to dry sands and sandy peats, weedy in open disturbed sandy sites |
Elevation | 0–3000 m (0–9800 ft) | 0–500 m (0–1600 ft) |
Distribution |
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
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AL; FL; GA; LA; MS; NC; SC; TN; TX; Central America; West Indies (Martinique); tropical Africa (including Madagascar); tropical Asia (including Indonesia); tropical Atlantic Islands; Indian Ocean Islands; tropical Pacific Islands; tropical Australia
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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.) |
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Source | FNA vol. 23, p. 136. | FNA vol. 23, p. 133. |
Parent taxa | Cyperaceae > Bulbostylis | Cyperaceae > Bulbostylis |
Sibling taxa | ||
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 | Scirpus barbatus, B. floridana, Isolepis barbata, Scirpus dussii, Stenophyllus floridanus |
Name authority | (Linnaeus) C. B. Clarke: in J. D. Hooker, Fl. Brit. India 6: 652. (1893) | (Rottbøll) C. B. Clarke: in J. D. Hooker, Fl. Brit. India 6: 651. (1893) |
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