78 PANICAtE.E. 



Avhole length of tlie bmuclies. First glume ovute-liinceoliite, 3- 

 nerved, about 3 mm. long, second 5-nervcd, 4 mm. long, third 

 glume (tloiiil glume of the staminute floret) 7-nerved, 3 mm. long; 

 [>ak'a nearly as long as its glume ; floral glume of the np[)er floret 

 round on the back, 3 mm. long, scabrid, very obscurely 5-nerved, 

 bearing a tuft of short hairs at its base and a terminal awn about 

 C mm. long; palea shoi'ter, 2-nerved. 



.Mexico, Prinyle 1746, Pahner 520. 



.1. Cuhi')isiHCiv\sch. in Planta? Wrightiana? Cubensis, No. 1552, 

 is identical with the above 1T4G of Pringle, 520 of I'alnier. 



Found in Mexico and several countries of Soutb America. 



3. A. Deppeana Nees, lionplandia 3:84 (1855). 



A rather slender, smooth perennial; culms bard, 90-150 cm. 

 high. Ligule very short and fringed with hairs; blades smooth or 

 slightly scabrid or pubescent, involute, 20-30 cm. long. Panicle 

 elliptical. 20-40 or more cm. long, rays mostly in threes to fives, 

 sparingly branched. Spikelets on pedicels 1-2 mm. long, scattered 

 the whole lengtli of the branches. First glume less than 2 nun. 

 long, besides the very short and narrow apex, 3-ncrved, second 

 lanceolate, 5-nervcd, 3.5 mm. or less long, third (floral glume of 

 the stuiuiiiiite floret) 2.3 mm. long, floral glunio of the upper floret 

 2 mm. long, with an awn having one bend above the spikelet. 



Mexico, Priiir/Jo 'M'.i'.). 



It differs chiefly from A. pallldd in its shorter glumes and 

 longer awn. with oidy one bend; aiul it is not improbable that a 

 study of more plants may show that one is only a variety of the 

 other. 



Tribe V.— PANICE-ffi. 



Fertile spikelet with one terminal perfect or pistillate flower, 

 with or without a staminate one below it; arranged in spikes, 

 racemes or panicles, falling off singly fnnn the ultimate branches; 

 the axis usually continuous. I'Moral glume and palea of the perfect 

 flower always firmer than the empty glumes, unawned (or in 

 BriorJiJoa whh a short straight iiwn); empty ginnu's rarely with 

 straight awns. Stamens three, rarely fewer, (irain enclosed in 



