SEDGE FAMILY 





12. HEMICARPHA Xees & Am. Kdinb. New Phil. Journ 17- ,6t 



Low tufted mostly annual sedges, with erect or spreading, almort filiform culm. 

 leaves, and terete small terminal capitate or solitary spikelels u,- 



volucre. Scales spirally imbricated all around, deciduous, all -. perfect Aowefl 



Perianth of a single hyaline sepal (bract?) between the flower and the rachis of the 

 let; bristles none. Stamens 1-3. Style 2-c-left, deciduous, not o|| rll at the ba*t 

 oblong, turgid or lenticular. (Greek, in allusion to the sinRle sepal.) 



About 3 species, natives of temperate and tn.pi. -.,] r.- K i.,,,s |-.. -,,!,... the folio* 

 occurs in the southwestern United States. The jjenus differs fr..n othwl 



by some authors, mainly in the presence of the perianth -. 



i. Hemicarpha micrantha (Vahl i 

 Britton. Hemicarpha. (Fig. 64' 



Scirptts inii rani/ins Vahl, Kmim. 2: 254. 1806. 

 Hemicarpha subsquarrosa Nees, in Mart. Fl. Bras. 



2: Part i. 61. 1842. 

 Hemicarpha micranlha Britton, Bull. Torr. Club 



15: 104. 1888. 



Annual, glabrous, culms densely tufted, com- 

 pressed, grooved, diffuse or ascending, I'-s' 

 loug, mostly longer than the setaceous smooth 

 leaves. Spikelets ovoid, many-flowered, ob- 

 tuse, about \" long, capitate in 2's-4's or soli- 

 tary; involucral leaves or one of them usually 

 much exceeding the spikelets; scales brown, 

 obovate, with a short blunt spreading or re- 

 curved point; sepal inconspicuous; stamen i; 

 achene obovate-oblong, obtuse, mucrouulatc, 

 little compressed, light brown, its surface min- 

 utely cellular-reticulated. 



In moist, sandy soil. Rhode Island to Pennsylva- 

 nia, Florida, Texas and Mexico. July-Sept. 



Hemicarpha micrantha aristulata Coville, Bull. 



Torr. Club, 21: 36. 1894. 



Scales pale, cuneate-obovate, tapering into squar- 

 rose awns about their own length. Kansas to Texas. 



13. LIPOCARPHA R. Br. App. TucUy I.xp. Congo, 459. 1818. 



Low annual sedges, with slender tufted culms leafy at the base, and terete many-flow. 

 ered spikelets in a terminal head, subtended by a i-several-leavcd invulm-re. Scales firm. 

 spirally imbricated all around, all fertile or several of the lower ones empty, at length de- 

 ciduous. Flowers perfect. Perianth of two small sepals (bracts?) one on each side of the 

 flower; bristles none. Stamens 1-2. Style 2-3-cleft, deciduous, its base not swollen. 

 Achene plano-convex or 3-angled. (Greek, alluding to the thick sepals in ome specie*,) 



About 7 species, widely distributed in warm and tropical ri-Kimiv 



i. Lipocarpha maculata Torr 



American Lipocarpli 



K'vllingia maciilalu Michx !'! HOT. Am 



1803. 

 / ipi>carphii >HIU ulitla Ton 1 ** 



1836. 



Annual, glabrous, root* fibrou*. culm* tufteil. 

 grooved, compressed, smooth, longer than Ibe 

 narrowly linear somewhat channeled leave*, J*- 

 lo'tall. Leaves of the involucre fr-4. the larger 

 I '-5' long; spikelets ovoid-oblong, obtu*r 

 3" long, i" in diameter, a o together in a termi- 

 nal capitate cluster; scale* rhombic or lanceo- 

 late, acute at the apex, curved, the tide* nearly 

 white, or flecked with reddish-brown spots, tbe 

 mid vein green; exterior sepal cooirolnte around 

 the achcue, nerved, hyaline; stamen i; achene 

 oblong, yellowish, contracted at tbe base. 



In wet ..mi. .i-' 



Also near Philadelphia probably a* 



live. July-Sept. 



