FIELD COLUMBIAN MUSEUM BOTANY, VOL. III. 



Panicle exserted, loose and open, 35-40 cm. long, 20-30 cm. wide, 

 branches alternate or subfasciculate, compound, slender, spreading 



or drooping, swollen and tawny- 

 tomentose in the axils; axis and ra- 

 chis scabrous. SpikeletS2-5x 15-18 

 mm., 3-4 flowered, pale brownish 

 green, on slender pedicels 2-3 mm. 

 long; joints of the rachilla 2 mm. 

 First glume 4.2 mm., lanceolate, 

 acuminate, hispidulous on the mid- 

 nerve and margins above, 3-nerved; 

 second 5.2 mm., lanceolate-ovate, 

 acute, 5-nerved, hispidulous on the 

 midnerve and margins above; floral 

 glume 8 mm. (excluding awn), 

 lanceolate, acuminate, bidentate, 

 3-nerved, pilose below, hispidulous 

 on the midnerve above, awn erect, 

 8-1 o mm., slender, scabrous; palea 

 6.3 mm., lanceolate, bidentate, pi- 

 lose on the nerves and margins. 

 Grain wine-color, smooth, lanceo- 

 late-ellipsoid, .9x3.7 mm.; in sec- 

 tion cordate. 



Hab. Tekax, Sept. 1895, Gaunter 1033. 



Gouinia latifolia (Griseb.)' Vasey Contrib. Nat. Herb. 1:365. 



Tricuspis (Neuroblepharum) 

 latifolium Griseb. 



Panicle exserted, loose and 

 open, 25 cm. long, 18 cm. wide, 

 branches subfasciculate, slender, 

 spreading or ascending, swollen 

 but glabrous in the axils; axis 

 and rachis minutely scabrous 

 above. Spikelets tawny, 

 3.1x12-15 mm., 3-4-flowered, 

 on slender pedicels 1-3 mm. 

 long; joints of rachilla i mm. 

 First and second glumes lanceo- 

 late, 3-nerved, hispidulous on 

 the midnerve; first 5-5.5 mm. 

 acuminate, second 6.3 mm., ob- 

 tuse; floral glume 7 mm. (ex- 

 cluding awn), lanceolate, acute, 

 bidentate, 3-nerved, long-pilose 

 on the nerves and marginal 

 spaces, midnerve hispidulous 

 above, awn erect, 4.5-5.5 mm., 

 slender, scabrous; palea 6 mm., lanceolate, bidentate, hispidulous on 

 the nerves and teeth. Grain dull black, rugose, narrowly ellipsoid, 

 1x4 mm. ; in section elliptic with a bilobed excavation on the ventrum. 



