CYPERACEAE 141 
2. HEMICARPHA Nees & Arn. Annual low or dwarf caulescent herbs. 
Leaf-blades very narrow or slender. Spikelets many-flowered, solitary or 
few together in an involuerate head, one involucral bract much exceeding 
the spikelets. Scales firm, spirally imbri- 
eate, each subtending a minute posterior 
bractlet and a flower. Flowers perfect. A 
Perianth wanting. Stamens 1 or 2. Style (7778 
i d not swollen at the base. Stigmas 
Achene flattened or nearly terete.— ~ 
i t 5 species, natives of warm regions. 
Besides the following, oer species occur 
n the western U. S.—Sum.-fall 
1. H. micrantha (Vahl) Pax. Plant 2-10 
em. tall or rarely more, often tufted or in 
mats: stem very slen der r, glabrous: leaf- 
blades setaceous, smooth: Dad peni 
or 2 or 3 together, ovoid, 2—4 . long, not br istl y: scales cuneate or n 
obov Ee about 1 mm. lo ong, ades po ibas braetlets fully 0.5 mm. lon i 
delicately veined: achene subeylindrie or ellipsoid-ovoid, about 0 Du m. ] 
mucronulate, light-brown.—Moist soil and pond-margins, various provinces, 
Fla. to Tex., Wash., Ont., and N. H.—(W. I., Mex., C. A., S. A.) 
3. DULICHIUM L. C. Rich . Perennial tall caulescent herbs, the ipi 
hollow, d leafy. Leaf-blades short, very short or wanting on 
lower shea Spikelets several-flowered, 2-ranked on axillary peduncles, bed 
Seales 2- d conduplicate, decurrent as 
a wing on the lower joint. Flowers perfect. 
Perianth of 6-9 retrorsely barbed elongate 
bristles. Stamens 3. Style not swollen. 
Stigmas 2. Achene flattened, narrow, 
beaked with the persistent style-base—One 
species. - 
arundinaceum Se de Plants 
ll: 
D. 
gregarious, the stem u . tall: leaf- 
Pura B ie Or ha flat, linear, 
-8 long: Dus narrowly linear 
b UN 1-2.5 em. long: appressed, 
lanceolate, fully ug as Pa as on Senay - 
joints: achene linear- spe d, 3-3.5 m Sum. slightly stipitate, each with a 
setaceous beak.— ( SHEATHED- GALIN GALE, pues wamps, springy places, and pond- 
margins, various P Fla. to Tex., Wash., Ont., and N. S. — Sum fall. 
4, CYPERUS [Tourn.] L. Annual or perennial scapose herbs. Leaves 
basal, with elongate narrow blades or rarely mere sheaths. Scapes simple (in 
our species) with a terminal involucre of one or several bracts which subtend 
e simple or compound inflorescence. pag escence-branches, when present, 
owered, 
or nearly terete, borne in clusters, heads, spikes, or panicles: scales 
2-ranked, deciduous, or persistent and falling away with the rachis which dis- 
