FEB. 1903. PLANTS YUCATAN^E MILLSPAUGH & CHASE. 



27 



PASPALUM L. Syst. Ed. 10, 2:855. 



Inflorescence of spikelike racemes, panicled or digitate. Spike- 

 lets i -flowered, perfect, in 2 rows on one side of the flattened rachis, 

 rachilla articulated below the empty glumes. Glumes 2-4 (usually 

 3), empty glumes thin or membranaceous, fruiting glumes coriaceous, 

 the margins of the glume inrolled over the palea. Grain dorsally 

 compressed, enclosed in the fruiting glumes, free. Stamens 3. 



Empty glume i elongatum. 

 Empty glumes 2: 



Spikelets glabrate, single vaginatum. 



Spikelets hirsute, in pairs lentiginosum. 



Empty glumes 3 oricolum. 



Paspalum vaginatum Swartz Prod. Ind. Occ. 21. 



Racemes 2-4, digitate X)r fasciculate, short exserted, 2.5-6 cm. 



long, 4 mm. wide; rachis minutely 

 scabrous on the margins, a few white 

 hairs at the axils. Spikelets single 

 on very short pedicels, 1.4x4 mm., 

 lanceolate -ovate, acuminate. 

 Empty glumes 2, equal, glabrous, 

 first 2-nerved (midnerve obsolete), 

 second 3-nerved; fruiting glumes 

 stramineous 1.3x4 mm , lanceolate- 

 ovate, acute; apex of palea not 

 enclosed. Grain light brown, ob- 

 ovoid; in section unequally biconvex. 

 Hab. In fresh water at the 

 aguada and Cenote" de Nabula, on 

 the Hacienda C h a b 1 6 , August, 

 Schott 546; salt swamps near 



Sisal, Nov. 1865, /jj; Progreso, Gaumer ijfo. 

 The species apparently rarely perfects seed. 



Paspalum elongatum Griseb. PI. Lorentz. 260. 



Panicle short exserted of 12-14 racemes, axis 10-12 cm. long, 

 glabrous, internodes .5-2 cm., racemes spreading or ascending, 2-3.5 

 cm. long, 3 mm. wide, i or 2 at a node; 

 rachis hispidulous on the margins and 

 bearing scattered bristle- like white hairs, 

 -a tuft of similar hairs at the axils. Spike- 

 lets in pairs on scabrous pedicels, 1. 1 x 2. 3 

 mm. , purplish, oval -oblong, obtuse. 

 Empty glume one, oblong, subacute, 

 3 nerved, glabrous; fruiting glumes oval- 

 oblong, 1.1x2.3 rnm. ,the glume promi- 

 nently 5-nerved, papillo-striate, the palea 

 of like texture. Grain not seen. 



Hab. MeridaAug. 3, 1 865 Schott 593 ; 

 specimen immature. (Illustration and de- 

 scription drawn from Mandon PL Boliv. 

 /2jj, cited by Grisebach in his description 

 of the species, which, however, is only in bloom, having no seed formed. ) 



