C Y P E R U S fuscus.
Brown Cyperus.
T R IA N D R IA Monogynia.
Gen. Char. Cor. none. Glumes imbricated, 2-
ranked, uniform, compressed. Style simple at
the base, deciduous. Seed naked at the base.
Spec. Char. Spikelets linear-lanceolate, fasciciilato-
corymbose. Glumes patent. Involucre of 3 unequal
leaves. Stem triangular. Stigmas 3.
Syn. Cyperus fuscus. Linn. Sp. PI. 69. Willd. Sp.
PI. v. 1. 280. Host Gram. Austr. v. 3. t. 73.
Schrad. FI. Germ. v. 1.118. Hook, in FI. Lond.
N.S. t. 89. Sm. Engl. FI. v. 1. 54. Hook. Brit.
FI. 19.
R o o t annual, fibrous. Stems 3—5 inches long, sometimes
erect, more frequently ascending or even procumbent,
triquetrous, naked above, leafy below. Leaves shorter
than the stems, from 2 to 3 inches long, linear-acuminate,
grooved, sheathing at the base. Involucre of three leaves,
similar in appearance to those of the stem, very unequal,
patent. Umbel terminal, compound; partial umbels generally
pedunculate, sometimes sessile. Peduncles thick, triquetrous,
having at their base minute ovate bracteae. Spike-
lets clustered, sessile, linear-lanceolate, bearing many
flowers. Glumes imbricated, distichous, ovate, obtuse,
concave, keeled, yellowish, near the margin deep purple-
brown, the keel green, under a high magnifying power
appearing rough at the point. Stamens 2-3 in each flower.
Anthers ovato-oblong, yellow. Germen minute, obtusely
triquetrous, acuminate. Style longer than the germen.
Stigmas 3, filiform. Seeds ovate, sharply triquetrous, yellow
brown.
Discovered by Adrian Hardy Haworth, Esq., above ten