39 



7- Xyris communis, Kunth. 



X. cominiinis, Kunth, Enum. iv. lo. (1843). 

 X. difformis, Chapm. Fl. S. U. S., 500 (i860). 

 X. gyvtnoptera, Griseb. Cat. PI. 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. 



X. difformis, Chap., is the same as X. cornmiinis, 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. 



X. serotina, Chapm. Fl. S. U. S , 500 (i860). 

 X. fasciailaris, Chapm. Mss. in Herb. Col. Coll. 



Scape straight, twisted, striate, 2-edged above and i-i;^ 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. — Apalachicola, A. W. Chapman, 1861. 



There are some small specimens in the Columbia College 

 Herbarium, collected by Dr. Hale in Louisiana. The leaves are 

 1-2 inches long; scape 3-5 inches high. The sepals are those of 

 serotina and the leaves show the papillose surface, characteristic 

 o{ serotina, near the base. They are probably young plants of 

 this species. 



