39 
7. XYRIS COMMUNIS, Kunth. 
X. communis, Kunth, Enum. iv. 10. (1843). 
X. difformis, Chapm. Fl. S. U. S., 500 (1860). 
X. gymnoptera, Griseb. Cat. Pl. Cub. 223 (1866.) 
X. partita, Chapm. Mss. in Herb. Col. Coll. ; 
Scapes straight, twisted, two-edged above, one-angled below, 
leaves linear to linear-lanceolate, 4-12 inches long; spikes many- 
flowered, ovate or round; margin of scale usually smooth; 
lateral sepals lanceolate, the upper two-thirds of the winged keel 
fimbriate. 
A. difformis, Chap., is the same as X. communis, Kunth, the 
sepals and whole appearance of the two plants being alike. 
The comparisons of communis and gymnoptera with difformis 
were based on C. Wright, Cuba, No. 3734; Eggers, St. Domingo, 
No. 2101, det. by Dr. Urban, at Berlin; Sintenis, Porto Rico, 
6764 and 934, det. by Urban, and Turckheim, Guatemala, No. 
201, det. by J. D. Smith. 
Maryland.—Salisbury, W. M. Canby. 
South Carolina.—Aiken, H. W. Ravenel. 
Florida—Dr. Chapman; Mayport, H. D. Keeler. 
Louisiana.—Opelousa, G. W. Letterman. 
Alabama.—Lee Co., J. D. Smith. 
8. XYRIS SEROTINA, Chapm. 
XX. serotina, Chapm. Fl. S. U. S , 500 (1860). 
X. fascicularis, Chapm. Mss. in Herb. Col. Coll. 
Scape straight, twisted, striate, 2-edged above and I-I y feet 
high; leaves linear-lanceolate, surface papillose, wide, spikes ovoid 
or globose, scales rounded, lateral sepals linear, upper third of 
keel-wing incised-fimbriate. 
Florida.—A palachicola, A. W. Chapman, 1861. 
There are some small specimens in the Columbia College 
Herbarium, collected by Dr. Hale in Louisiana. The leaves are 
I-2 inches long; scape 3-5 inches high. The sepals are those of 
serotina and the leaves show the papillose surface, characteristic 
of serotina, near the base. They are probably young plants of 
this species. 
