36 
A. Sheath of scape longer than the leaves. 
I. XYRIS BREVIFOLIA, Michx. 
X. brevifolia, Mich. F1. Bor. Amer. i. 23 (1803). 3 
Scape terete, smooth, occasionally spirally twisted and 4-12 
inches high. Leaves linear, narrow, edges smooth, 1-3 inches 
long; spikes globose, light brown; scales usually lacerate on 
the outer margin, oblong ; wingless keel of lateral sepals very 
slightly crenulate. 
Florida.—Jacksonville, A. H. Curtiss, No. 3,000; St. Augus- 
tine, W. M. Canby, 1869; Tampa, J. D. Smith ; Herb. Dr. Chap- 
man; Indian River, Ed. Palmer, No. 576; Apalachicola, B. F. 
Saurman; Manatee, A. P. Garber, F. Cozzans, Dr. Bacon; De 
Land, G. D. Hulst (1891); Lloyd’s, L. H. Lighthipe (1891); 
Lake Winnemissett, G. D. Hulst (1891). . 
2. XYRIS FLABELLIFORMIS, Chapm. 
X. flabelliformis, Chapm. Fl. S. U.S. 498 (1860). 
X. scirpotdes, Chapm. Mss. in Herb..Col. Coll. 
X. brevifolia, B subcarinata, Chapm. Mss. in Herb. Col. Coll. 
Scapes slender, usually spirally twisted, 4-12 inches high, 
clustered; leaves linear-lanceolate to linear, short, spreading: 
spikes globose to oblong, few flowered; bracts light brown, 
angular, their margins entire; lateral sepals shortly cut-fringed om 
the wingless keel. & 
Florida. —Ex. Herb. S. T. Olney; Herb. Col. Coll.; Hibernia, 
W. M. Canby; Manatee Co., J. T. Rothrock ; Jacksonville, A. H 
Curtiss, No. 3,001. 
B. Sheath of scape shorter than leaves. 
* Narrowly winged keel of lateral sepals fringed with hairs. 
3. XYRIS AMBIGUA, Beyr. 
X. ambigua, Beyr. in Kunth, Enum. iv. 11 (1843). 
X, stricta, Chapm. Fl. S. U. S. 498 (1860). 
A. rhombipetala, Sauv. Fl. Cub. 160 (1868). : 
Scape rigid, slightly twisted, furrowed, two-edged above, 2-_ 
3 feet high; leaves linear-lanceolate, 6-12 inches long, smooth 
and shining ; spikes ovate-lanceolate, oblong or cylindric, ge? 
erally acute, sometimes obtuse, many-flowered ; bracts convex 
light brown; lateral sepals lanceolate, shining, the upper 
thirds of the narrowly winged keel fringed and tapering at 
ends, 
