. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. 342 CYPERACEAE. Vol. I 9. R. fusca. 10. R. gracilenta. ii. Spikelets few-several in rather loose clusters. Achene smooth. Leaves setaceous ; achene obovate, shining. Leaves narrowly linear. Achene broadly oval. Achene narrowly obovate. Achene transversely wrinkled. Spikelets ovoid, in erect cymose clusters; achene longer than the bristles. • Leaves f
. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. 342 CYPERACEAE. Vol. I 9. R. fusca. 10. R. gracilenta. ii. Spikelets few-several in rather loose clusters. Achene smooth. Leaves setaceous ; achene obovate, shining. Leaves narrowly linear. Achene broadly oval. Achene narrowly obovate. Achene transversely wrinkled. Spikelets ovoid, in erect cymose clusters; achene longer than the bristles. • Leaves flat; spikelets nearly or quite sessile. 12. R. cymosa. Leaves involute ; spikelets distinctly pedicelled. 13. Spikelets spindle-shaped, in drooping panicles; bristles long. 14. R. inexpansa. i. Rynchospora corniculata (Lam.) A. Gray. Horned Rush. Fig. 841. Schoenus corniculatus Lam. Tabl. Encycl. i: 137. 1791. 7?. corniculata A. Gray, Ann. Lye. N. Y. 3: 205. 1835. Rhynchospora corniculata macrostachya Britton, Trans. N. Y. Acad. Sci. 11 : 84. 1892. R. macrostachya Torr. Ann. Lye. N. Y. 3: 206. 1835. Culm obtusely triangular, stout or slender, smooth, 3°-7° tall. Leaves flat, broadly linear, 6-18' long, 3"-8" wide, rough-margined; umbels terminal and axillary, sometimes i° broad, usually compound; spike- lets spindle-shaped, 4"-6" long in flower, capitate at the ends of the rays and raylets; primary rays slender, sometimes 6' long; scales lanceolate, thin, acute, light brown; bristles about 6, subulate or filiform, rigid, upwardly scabrous, shorter or longer than the achene; style subulate, entire or minutely 2-toothed at the apex, 2-4 times longer than the achene, upwardly scabrous, i'-l' long, persistent and much exserted beyond the scales when mature; achene obovate, flat, 2" long, dark brown, smooth, its surface minutely cellular-reticulated. In swamps, Massachusetts to Florida, west to Ohio, Mis- souri, Kansas and Texas. Consists o
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