Home Flora of Missouri
Name Search
!Rhynchospora capillacea Torr. Search in The Plant ListSearch in IPNISearch in Australian Plant Name IndexSearch in NYBG Virtual HerbariumSearch in Muséum national d'Histoire naturelleSearch in Type Specimen Register of the U.S. National HerbariumSearch in Virtual Herbaria AustriaSearch in JSTOR Plant ScienceSearch in SEINetSearch in African Plants Database at Geneva Botanical GardenSearch in Flora do Brasil 2020Search in Reflora - Virtual HerbariumSearch in Living Collections Decrease font Increase font Restore font

Published In: A Flora of the Northern and Middle Sections of the United States 1: 55–56. 1823. (Fl. N. Middle United States) Name publication detail

Project Name Data (Last Modified On 9/1/2009)
Acceptance : Accepted
Project Data     (Last Modified On 7/9/2009)
Status: Native


Export To PDF Export To Word

1. Rhynchospora capillacea Torr. (beaked rush)

Pl. 78 a–c; Map 299

Plants forming dense clumps, with slender, branched rhizomes. Aerial stems 10–40 cm long, very slender. Leaves basal and usually 1–2 on the lower portions of the aerial stems, the leaf blades 4–40 cm long, 0.2–0.4 mm wide, hairlike, the margins inrolled. Inflorescences of 1–2(–3) clusters of spikelets, less commonly with individual spikelets. Spikelets 5–7 mm long, lanceolate to narrowly elliptic in outline, pointed at the tip, with 1–5 of the florets fertile. Spikelet scales 3–4 mm long, elliptic to ovate with the midrib minutely extended past the pointed tip, reddish brown to dark brown. Perianth bristles 6, longer than the fruits, with downwardly pointing barbs. Fruits with the tubercle 0.8–1.6 mm long, narrowly triangular-attenuate, the main body 1.7–2.1 mm long, narrowly elliptic to narrowly obovate in outline, the surface patterned with fine, wavy, horizontal lines, sometimes appearing finely wrinkled, uniformly brown at maturity. 2n=26. June–September.

Scattered in the Ozark and Ozark Border Divisions, mostly in the eastern half of the state (northeastern U.S. and adjacent Canada west to South Dakota and Missouri). Fens and calcareous seeps of rocky ledges of bluffs and stream banks.

This plant is a good indicator of calcareous seeps and fens. The slender stems and leaves make it easily overlooked in the field.



© 2018 Missouri Botanical Garden - 4344 Shaw Boulevard - Saint Louis, Missouri 63110