CHLORIDES. 397 



Prof. Scribner protests against this transfer of Spartina, giving 

 his reasons in Bull. Torr. Club, 10: 85 (1883). 



a. Spikes 1-3 cm, long, 25-30, in a dense spike. ... 1 

 a. Spikes 2-4 cm. long, 30-50, closely iinbricated. ... 6 

 a. Spikes 2-7 cm. long, 3-8 in an uninterrupted spike. . . 5 

 a. Spikes 3-5 cm. long, blades narrow, 10-30 cm. long. . . (b) 

 b. Spikes 4-5, slightly imbricated, glumes hispid-serru- 

 late 3 



b. Spikes 4-10, slightly imbricated, glumes ciliate-hispid. 4 

 a. Spikes 5-10 cm. long, 5-20 in a loose raceme, blades GO- 



100 cm. long 3 



a. Spikes 5-10 cm. long, 20-50 in a close raceme, var. of . 2 



1. S. densiflora Brongn. Duperrey, Itiu. Bot. 14. S. Gouini 

 Eourn. Hemsl. Biol. Centr. Am. Bot. 3: 509 (1880). 



A glabrous perennial; culms nearly solid, 90 cm. high. Sterile 

 shoots numerous, blades rigid, involute, pungeut-poiuted, 30-45 

 cm. long, 1-1.5 mm. diam., leaves of the culm 3; ligule a mere 

 ring; the upper blade 3-6 cm. long. Spikes 1-3 cm. long; 25-30 

 in a close spikelike raceme. Spikelets linear, hispid on the keels, 

 first glume linear, 1-nerved, 3.5 mm. long, second linear-lanceolate 

 when spread, 1-nerved, about 5 mm. long, mucronate; flr4al glume 

 linear, obtuse or emarginate, 1- 

 nerved, 5.5 mm. long; paleaalittle 

 longer than its glume. 



Mexico (San Luis Potosi), Pri7i- 

 gle 3760. 



Alkaline meadows. 



2. S. cynosuroides (L.) Willd 



Enum. 80 (1809). Dadylis cyjio- 



suroides L. Sp. PI. 71 (1753). 



_, r, Fig. 70. — Spartina cynosuroides. 



FeeSH-WATER Cord-grass. A splkelet ; a, floret. (Ridmrd- 



Culms rather slender, 60-180 ^o^-) 

 cm. high. Leaf-blades rough on the margins, involute, the apex 

 long pointed, 60-120 cm. long, 7-15 mm. wide. Spikes 5-20, in a 

 loose raceme, rachis hispid on 2 angles. Spikelets elliptical -lanceo- 

 late, hispid on the keels, first glume elliptical-lanceolate, 1-nerved, 



