34 FIELD COLUMBIAN MUSEUM BOTANY, VOL. III. 



palea each with a crateriform blackish apex surrounded by pubes- 

 cence, the palea concave below, gibbous above, and the glume hav- 

 ing a short dorsal furrow near the base. Grain white, suborbicular, 

 1.6 x 2mm.; in section convexo-concave. 



Hab. Merida, 8-10 feet high, Oct. n, 1865, Schotl 673, "Com- 

 mon on fences in low brush lands, 4 feet high, Izamal," Gaunter 1032, 

 2482, Chichankanab 2144, 2409, 2462. 



Panicum divaricatum latifolium (Rupr.)Fourn. Mex. PL Enum. 

 Gram. 32. 



Panicum latifolium Rupr. Bull. Acad. Brux. 9:14. non L. 



Panicles larger, branches spreading rather than divaricate. 

 Spikelets as in divaricatum L. but more numerous on shorter pedi- 

 cels; fruiting glumes slightly more oblong, .2 mm, or less longer. 

 Leaves two to three times the width of those of the species and 

 often twice their length, puberulent or velvety beneath; their sheaths 

 hirsute and ciliate. Plant more erect, less branching. 



Hab. Merida, Aug. and Sept., 1865, Schott 600; "Common in 

 waste places about Izamal, 4 feet high," July 1895, Gaunter 878; (Pan- 

 icum divaricatum var - ? Field Col. Mus. Bot. 1:288.) "Com- 

 mon along old fences and in brushlands near Izamal, Aug. to Feb." 

 1025, Calotmul 2141, Chichankanab 2461; margin of a well at Chan 

 Oonot, Millspaugh PI. Utowance 1639 (Panicum compactum Field Col. 

 Mus. Bot. 2:24). 



Called ZIT, "reed-grass" or "small cane," by the Mayas. 



Panicum paspaloides Pers. Syn. 1:81. 



Panicle included at the base, of 10-12 racemes; axis 12-15 cm. 

 long, flattened, hispidulous on the margins. Racemes erect, 1.52.5 



cm. long. Spikelets alternate on short 

 pedicels on one side of the flattened, 

 zigzag, hispidulous rachis, 1.4x2.4 

 mm., pale green, ovate, acute, glab- 

 rous. First glume 1/3 the length of 

 spikelet, broad, truncate, 3-nerved; sec- 

 ond slightly shorter than third, sub- 

 acute, 5-nerved; third short-acuminate, 

 5-nerved; fruiting glumes 1.3x2.2 

 mm., light brown, oval, base acute, 



P A xii^ apex acuminate, transversely rugose. 



Grain brownish- white, suborbicular, 

 i xi. 2 mm.; in section convexo-concave. 



Hab. "Common in old fields, 3 feet high, Oct.," Izamal, Gau- 

 mer 1027 (Pas palum paspaloides Field Col. Mus. Bot. 1:354), Chichan- 

 kanab 2489. 



Panicum fuscum Swartz Prod. Veg. Ind. Occ. 23. 



Panicle at first included, exserted at maturity, dense, contracted, 

 6-12 cm. long, 2-5 cm. wide; axis hispid and bearing scattered, 



