50 FIELD COLUMBIAN MUSEUM BOTANY, VOL. III. 



Sporobolus Domingensis (Trin.) Kunth Enum. 1:214. 

 Vilfa Domingensis Trin. 



Panicle short exserted, spreading at maturity, 5-7 cm. long, 1-3 



cm. wide, axis and rachis glabrous, 

 branches subverticillate. Spikelets 

 .7x2 mm., stramineous to light lead 

 color, glabrous, on slender pedicels. 

 First glume .6mm. , ovate, subacute; 

 second 1.9 mm., ovate, acute; floral 

 glume slightly longer, lanceolate- 

 ovate, acute; palea 1.8 mm. broad, 

 emarginate, a shallow fold between 

 the 2 green nerves, easily splitting. 



U Grain reddish brown, oval-oblong, 



U 1,1 VO/ -3--55 x i mm -; in section oblong, 

 rounded on dorsum, concave on 

 ventrum. Pericarp very thin, loose. 

 Hab. Arid scrub land south of 

 Progreso, March 5, 1899, Millspaugh PL Utowana /7/J. 



CYNODON Pers. Syn. 1:85. 



Spikelets i -flowered, awnless, compressed, singly sessile in 2 

 rows on one side of slender spikes, digitate at the end of peduncle, 

 rachilla articulated above the empty glumes, produced into a short 

 point behind the palea. Empty glumes 2, keeled; flowering glume 

 broader, scaphoid. Grain laterally compressed, free. Stamens 3. 



Cynodon Dactylon (L.) Pers. Syn. 1:85. 



Panicum Dactylon L. 



Inflorescence exserted, of 4-5 digitate spikes, 3-4 cm. long, 

 1.5-2 mm. wide; bearing 25-35 closely imbricated spikelets; rachis 

 flat, hispidulous. Spikelets i.i X2.I mm., 

 compressed. First and second glumes 

 lanceolate, acute, i-nerved, hispid on the 

 keels, first 1.5 mm., second 1.7 mm. long; \y\ j ' \\ 



floral glume2.2mni. compressed, i -nerved, 

 silky-ciliate on the prominent keel; palea 

 slightly exceeding its glume, broad, the 2 

 prominent nerves close together, ciliolate; 

 rachilla produced 1.5 mm. or very short, 

 blunt. Grain pinkish ashy, narrowly ob- 

 long, .25-. 75 xi. 4 mm.; in section lanceo- 

 late oblong. 



Hab. At the Hacienda Saragossa, \^/$ 

 Sept. 8, 1865. Schott 7^7 ,- frequent at Iza- 

 mal, i foot high, April, 1895, Gaumer 68 j, Silam 1251, Chichankanab 



I2 95- 



This species flowers abundantly but seldom perfects seed. 



CHLORIS Swartz Prod. Veg. Ind. Occ. 25. 



Inflorescence of several to many spikes arranged in a false whorl. 

 Spikelets i -flowered, perfect, sessile in 2 rows along one side of a 



