32 



PANICACE^. 



R. compressa L. f. Suppl. 114 (1781). Var. fasciculata (Lam.) 



Hack., D. C. Monog. Phau. 6: 386 (1889). 



R. fascicidata Lam. 111. Gen. 1:204 (1791). Lepturis fascicu- 



latus Trill. Fund. Agrost. 123 (1820). Hemarthria Havanlii 



Vasey. 



Culms branching, compressed, 120 cm. or more high. Lower 



blades few and rather short, keeled, ciliate on the margins, the 

 sheaths of the other leaves half to two-thirds 

 as long as the internodes ; lignle short ciliate, 

 blades of the culms o-7-nerved^ more or less 

 scabrous, usually conduplicate, 10-18 cm. 

 long, 4-6 mm. wide. Spikes numerous, 

 terminal and lateral, usually compressed and 

 more or less enclosed, 6-10 cm. long. Ses- 

 sile spikelets about as long as the joints of 

 the rachis. In the sessile sj^ikelets, first 

 glume oblong acute, 6 mm. long, about 

 10-nerved, second glume linear, as long as 

 the first, third glume linear acute, 5-6 mm. 



Fig. 9 



pressa 



j^TflYl'iii'llT'is COTTh' 



Portion of a long, fourth ovate-lanceolate. obtuse, 4 mm. 



spike, X 3. (Richardson.) ^^^^^, ^^^^^ about the length of its glume. 

 In pedicellate spikelets first glume flat, linear-lanceolate, extreme 

 tip obtuse and 2-toothed, 7-nerved. second glume lanceolate, ex- 

 tending to the apex of the first glume, compressed, 3-5-nerved, 

 third glume and palea much alike, about 3 mm. long. Grain 

 2 mm. long. 



S. E. Texas, Havard, Nealley ; Mexico, Pringle 3132. 

 Also found in N. Africa and S. W. Europe. 



10. (87). Hackelochloa Kuntze. Rev. Gen. PI. 776 (1891). 

 Manisuris Sw. Prod. Veg. Ind. Occ. 1: 186 (1797), not Linn. 



Spikelets in pairs in the notches of the 1-sided articulate rachis 

 of a simple spike, 1 sessile and half embedded in a cavity on the 

 rachis, with 1 perfect flower, the other on a short appressed pedicel 

 reduced to 2 empty glumes, or with a staminate flower, the spike 

 single on the peduncle above a sheathing bract. Glumes of the 



