FEB. 1903. PLANTVE YUCATANVE MILLSPAUGH & CHASE. 



57 



Sept., Gaumer 8jj, Chichankanab 1998, 2463, San Anselmo, 

 forests of Buena Vista Xbac, 18 inches high, common, Sept. 2283, 

 2327. 



TMos. 1999 (in part), 2283 and 2327 Gaumer, and 401, 590 and 

 Schott, are a smaller form with narrower leaves, the inflorescence 

 more exserted, and spikes somewhat spreading, but no difference in 

 the spikelets can be found, and some of the larger specimens show 

 characters approaching those of the smaller, the basal branches (when 

 present) bearing the narrow leaves. 



Leptochloa fascicularis (Lam.) A. Gray Man. Bot. 588. 

 Festuca fascicularis Lam. 

 Inflorescence included at base or finally exserted, 1015 cm. long, 



2-4 cm. wide, of 10-25 or rnore slender, erect or ascending spikes, 



3-8 cm. long, 5 mm. wide, of 20-30 al- 

 ternate, ascending spikelets; rachis 

 angled, scabrous, internodes 4-8 mm. 

 Spikelets 2.5-3 x 8-10 mm. , loosely 410- 

 flowered, on short scabrous pedicels, ra- 

 chilla, smooth, terminating in ah empty 

 glume, joints .7-. 8 mm. First and sec- 

 ond glumes lanceolate, acuminate, sca- 

 brous on the keel, first 2.22.8 mm., 

 second 3-3.5 mm. long; floral glume 4-5 

 mm., lanceolate, 3-nerved, margins and 

 lateral nerves appressed silky pilose be- 

 low, midnerve pilose below and pro- 

 longed into a scabrous awn, .5. 8 mm. 

 long, between the two slender teeth of 

 the apex; palea nearly equal, elliptic, 



obtuse, appressed silky pilose on the nerves. Grain reddish brown, 



oval, narrowed at the base, 7 x 1.5 mm.; in section plano-convex. 

 Hab. Chichankanab, Gaumer 1568. 

 Yucatan specimens have spikelets and floral glumes somewhat 



smaller than typical forms. 



GOUINIA Fourn. Mex. PI. Enum. Gram. 103. 



Spikelets 3-4 flowered, perfect, slender pediceled in two roA*s 

 along one side of the branches of an ample, spreading panicle; rachilla 

 articulated above the empty glumes and between the florets. Glumes 

 compressed, keeled, first and second empty; floral glumes with a 

 hairy callus, bidentate, awned. Grain long elliptic, sulcate down the 

 ventrum. Stamens 3. 



Awns 4.5-5.5 mm., grain black, rugose 

 Awns 8-10 mm., grain wine-color, smooth 



latifolia. 

 virgata. 



Gouinia virgata (Presl.) Scribner U. S. Dept. Agr. Div. Agrost. 



Bull., 4, 10. 



Bromus virgatus Presl. 

 Go uinia polygama Fourn. 



