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rush hairsedge

Habit Herbs, perennial, densely cespitose.
Culms

10–30(–40) cm, bases hard, swollen.

Leaves

¼–1/2 length of scapes;

sheaths brown to stramineous, abaxially glabrous or hirtellous;

blades spreading to erect, filiform, wiry, less than 1 mm wide, involute, margins and adaxial surface glabrous to hispidulous or scabrid.

Inflorescences

terminal, mostly in compound, compact or diffuse, involucrate anthelae;

scapes ascending to erect, wiry, 1 mm thick, coarsely ribbed, ribs glabrous or hispidulous to scabrid;

proximal bladed involucral bract exceeding or exceeded by inflorescence.

Spikelets

red-brown to chestnut-brown, lanceoloid to cylindric, 4–6 mm, mostly longer than broad;

fertile scales ovate, curvate-keeled, 2–2.5 mm, apex acute, glabrous or papillose-puberulent, midrib excurrent as mucro or mucronula.

Flowers

stamens 3;

anthers linear, 1–2 mm.

Achenes

gray to yellow-brown or dark brown, trigonous-obovoid, 1–1.2(–1.5) mm, faces rugulose, papillate;

tubercle a globose button.

2n

= 60.

Bulbostylis juncoides

Phenology Fruiting all year.
Habitat Savanna, prairie, steppes, basic and acidic rock outcrops, mostly higher elevations
Elevation 100–3000 m (300–9800 ft)
Distribution
from FNA
AZ; NM; TX; Mexico; Central America; South America; West Indies
[BONAP county map]
Discussion

Bulbostylis juncoides is unquestionably the most polymorphic species of its complex in Bulbostylis and with a potential synonymy more elaborate than given here.

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

Source FNA vol. 23, p. 135.
Parent taxa Cyperaceae > Bulbostylis
Sibling taxa
B. barbata, B. capillaris, B. ciliatifolia, B. funckii, B. schaffneri, B. stenophylla, B. warei
Synonyms Schoenus juncoides, B. arenaria, B. argentina, B. langsdorffiana, Fimbristylis capillaris var. pilosa, Fimbristylis juncoides, Fimbristylis savannarum, Oncostylis arenaria, Oncostylis tenuifolia var. hirta, Oncostylis tenuifolia var. nana, Scirpus lorentzii
Name authority (Vahl) Kükenthal ex Osten: Anales Mus. Hist. Nat. Montevideo, ser. 2, 3: 187. (1931)
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