﻿EUSTACHYS IN NORTH AMERICA 441 



Culms 2-j dm. tall, compressed, erect, or later decumbent a 

 the base and rooting at the lower nodes ; nodes of the erect culm 

 2 or 3 : culm leaves 2 or 3 ; sheaths compressed, keeled, loosely 

 embracing the culm, much shorter than the internodes, usually 

 rough on the keel ; ligule a scarious ring 1 mm. or less broad ; 

 blades 2-15 cm. long, 3 mm. or less wide, erect or nearly so, flat, 

 or folded when dry, very rough on both surfaces : inflorescence 

 consisting of 6-15 spikes, usually 8-10, 2-4 cm. long, often 

 nexuous, widely spreading, spikelet-bearing to the base : spikelets, 

 exclusive of the awns, 1.7-2 mm. long, triangular, about as 

 broad as long : scales 4 ; first scale acute, one half to three 

 fifths as long as the second which is 1. 5-1.75 mm. long and 

 broader above the middle; third scale 1.7-2 mm. long, in side 

 view elliptic and about .9 mm. wide, nearly equilateral, obtuse, the 

 callus pilose, the lateral nerves densely pilose their entire length 

 with short hairs about .4 mm. long, the midnerve sparingly so, 

 the awn inserted just below the apex, .5-1 mm. long, the palet 

 a bout as long as the scale ; fourth scale about 1 mm. long, in side 

 view broadly triangular and 1.3 mm. broad, the midnerve slightly 

 curved, the lateral nerves branching twice, making the scale 

 appear 7-nerved above, the awn inserted just below the apex 

 • 2 ~3 mm. long: seed elliptic, about 1.3 mm. long, finely striate. 



Sandy soil, Texas. At once distinguished from all other 

 species by its very broad 7-nerved fourth scale. 



1 he following specimens are referred to this species : 

 Lindheimer, 1847, n o. 730. Austin, Elihu Hall, 1872, no. 

 7/6. Upper Brazos, J. Reverchon, Sept., 1879, no. 1148; also 

 a t Seymour, Sept., no. 3440*. San Diego, Miss Mary B. Croft, 

 l8 84, no. 60. Laredo, C. G. Pringle, July 24, 1889, no. 2405. 

 Austin, J. E. Bodin, Sept., 1891, no. 292. Corpus Christi, 

 Nueces Co., A. A. Heller, March 14-21, 1894, no. 1449- R- T. 

 Hill > 1895, no. 86. 



7. Chloris Tex an a (Vasey). 



Chloris ciliata var. Texana Vasey, Bull. U. S. Dept. Agric. Div. 

 Hot -i2 1 : 3 o. 1890. 



^ulms 2.5-6 dm. tall, simple, slender, compressed; nodes 



out 3 : culm leaves about 3 ; sheaths much shorter than the in- 



rnodes, coarsely striate ; ligule a scarious ciliolate ring about .5 



To- broad ; blades 6-20 cm. long, 3-6 mm. wide, flat, ascending, 



oth ^ n t ' le mar £ ,ns anc * toward the apex on the lower surface, 

 erwise smooth : inflorescence finally exserted ; spikes 3-6, 4-8 



