292 MONOCOTYLODENOUS. 



(g) Stigmas 3, terminal spike sterile, the rest androgynous. 



21 C Triceps. <S<e77i acutely angled, slender, scabrous along the margins. 

 Leaves linear, pubescent at the base. Spikes usually 4, approximate, sessile, 

 3 of them larger than the olher. Glumes ovate. Paha: shorter than the 

 glume, glabrous. Fruit ovate, compressed, 3-angled. 



%- April— May. Damp soils. 12-18 in. 



22 C HiRsuTA. Stem 3-angled, slender, pubescent near the summit. 

 Zeaues narrow, sligii.Iy pubescent- Spikes 3-4, the terminal one sterile at 

 the ba^e. lower ones on short peduncles. Fruit ovate, obtuse. 



% May— June. Southern Ga. 10-12 in. 



23 C BuxBAUMii. ^tem slender, 3angled. Leaves narrow, with scabrous 

 margins. Spikes 3-4, the terminal one, with the lower half, bearing sterile 

 flowers. Glumes lanceolate, dark colored. Palece light colored, 2-cleft at 

 the summit. Fruit eliptic, as long as the glume. 



% July— Aug. Swamps. 1-2 ft. 



24 C Trichocarpa. ^tem acutely 3-angled, the angles serrulate. Leaves 

 channeled, rather broad, scabrous on the upper surface. Sterile spikes 1-5, 

 terete ; fertile 2-3, erect, cylindrical. Bracts of the fertile spikes like the 

 leaves, long. Glumes slightly mucronate. Palece ovate, pubescent. Fruit 

 hairy, ovale, longer than the glumes. 



% April. Swamps. Low country. 2-3 ft. 



(Ii) Stigmas 3 ; fertile and sterile spikes distinct, the fertile ones sessile, or with 



shea thed pedun cles. 



25 C Varia. Stem erect, slender, with scabrous angles. Leaves subulate* 

 Fertile spikes generally 3, nearly globose ; sterile spike terminal. Glumes 

 oblong-lanceolate, tinged with brown. Palece pubescent. Fruit sub-globose, 

 hispidly pubesceni, obtusely 3-angled. 



% April— May. Dry woods. 8-12 in. 



26 C Marginata. S/em slender, 3-angled. Leaves linear, with slightly 

 scabrous margins ; fertile spikes generally 2, sub-globose, approximate, the 

 sterile one terminal, cylindrical, Jong. Glumes ovate, brown, with a white 

 margin. Fruit globose, pubescent, longer than the glume. 



% April— iMay. Dry soils. 8-12 in. 



27 C Vestita. Stem acutely 3-angled. Leaves narrow, ligulate. Sterile 

 spike mostly solitary, terminal ; fertile spikes generally 2, sessile, sometimes 

 sterile at the summit. Glumes brown, with white margins. Palece pubes- 

 cent. Fruit ovate, nerved, pubescent, with a short beak. 



% May— June. Wet soils. 1-2 ft. 



28 C Tentaculata. 67em 3-angled. Zea^Jcslong, linear-lanceolate, nerv- 

 ed. Sterile spike solitary, cylindrical ; fertile spikes 3, sessile, horizontal, 

 with long bracts. G/wmes mucronate. PaZetP ovate, beaked, jpruif ovate, 

 nerved, with along beak. 



% May— June. Wet places- 12-18 in. 



29 C Lupultna. Stem erect, glabrous, leafy, thick, 3-angIed. Leaves li- 

 near-lanceolate, with scabrous margins. Sterile spike on a short peduncle ; 

 fertile ones, 3, erect, with long, leafy bracts. Glume M'ith a hispid point. — 

 Palece 2-beaked, longer than the glume. Fruit ovate, nerved, with 2 long 



% April— May. Swamps. 2-3 ft. 



30 C Gigantea. S/ewi erect, 3-angled, glabrous. Zeares ligulate, slight- 

 ly channeled. Sterile spike terminal, with acute, ovate glumes; fertile spikes 

 3. Palece ovate, nerved. Fruit 3-angled. 



% April — May. Bog?, common. 1-2 ft. 

 31 C FoLLicuLATA. Stem erect, 3 angled. Leaves ligulate, scabroiis. 

 Sterile spike solitary, terminal, with acute, lanceolate, glumes ; fertile 

 spikes usually 4, erect, on short peduncles. Palece ovate, beaked, inflated. 

 Fndt ovate, beaked. 



%. June. Swamps. 12-18 in. 



