FEB. 1903. PLANTVE YUCATANJE MILLSPAUGH & CHASE. 



21 



rachis, or at 3*5 at the terminal joint, the sessile perfect, the pedicel- 

 late staminate or neuter. Glumes of perfect spikelet 4, first and sec- 

 ond indurated, floral glume hyaline, awned, palea hyaline, minute. 

 Grain ovoid, dorsally compressed. Stamens 3. 



Halepense. 



Panicle loose and open 

 Panicle dense and contracted: 



Awn 8-10 mm., grain 3.6 mm. 



Awn ^ mm., grain 4.4 mm. 



Drummondii. 

 vulgare. 



Sorghum Halepense (L.) Pers. Syn. 1:101. 

 Holcus Halepensis L. 



Panicle long exserted, 12-30 cm. long, loose and spreading; 

 branches sub-verticillate; axis and branches sharply serrulate-angled, 



densely pubescent in the axils. 

 Racemes borne on the ultimate 

 branches of the panicle, of i or 

 2 joints; internodes 4 mm. long, 

 slender, densely tawny pilose. 

 Pediceled spikelet lanceolate, 6 

 mm. ; first and second glumes 

 7-nerved, acute, lateral nerves 

 strongest and hispid above, cili- 

 ate; third glume shorter, hyaline 

 ciliate - fimbriate, subtending a 

 Smaller similar palea and stam- 

 inate flower; pedicel J^-^i the 

 length of sessile spikelet, pilose. 

 Perfect spikelet ovate, 6 mm., 

 with a ring of tawny hairs at the base; first glume reddish brown, 

 minutely bidentate, with a pair of hispid strong lateral nerves and 3 

 faint intermediate ones, tawny pilose; second of equal length and sim- 

 ilar, apiculate; third shorter, white, hyaline, 2-nerved, ciliate; floral 

 glume Y-Z the length of third, cleft ^ its length, ciliate, bearing a gen- 

 iculate awn 6-9 mm. long, subtending a minute, lanceolate, fimbriate- 

 ciliate palea. Grain reddish brown, obovoid 1.7x2.7 mm.; in sec- 

 tion, oblong with convex dorsum. 



Hab. Near Izamal, "Extensively cultivated since 1880 as a pas- 

 ture grass under the name SACATE PARANA," June, 1895, Gaumer 720, 

 2459, Chichankanab /2(?7, 1299, 



Sorghum Drummondii Nees. ex Steud. Syn. PI. Gram. 393. 



Andropogon Sorghum Drummondii Hackel. 



Panicle long-exserted, 8-12 cm. long, dense and compact; 

 branches alternate, short, pubescent, especially in the axils. 

 Racemes of 2-3 inarticulate joints, internodes 1-1.5 mm., pubescent. 

 Pediceled spikelet 4-4.5 mm., lanceolate, pubescent; first and second 

 glumes acute, 7-g-nerved, the lateral nerves strongest and hispid, 



