492 MISC. PUBLICATION 200, U. S. DEPT. OF AGRICULTURE 



longer than the lemma; floret sparingly pilose or glabrous. 91 

 Salt marshes along the coast, often growing in the water, Quebec and 

 Newfoundland to Florida and Texas (fig. 1044); 

 Atlantic coast of Europe. Through the southern 



Eart of the range of the species the spike- 

 its are often more imbricate. The imbri- 

 cate form with glabrous spikelets has been 

 differentiated a s $. 

 alterniflora var. glabra 

 (Muhl.) Fernald ; that 

 with sparsely pilose 

 spikelets as S. alterni- 

 flora var. pilosa (Merr.) 

 'Fernald. 



5. Spartina spartinae 

 (Trin.) Merr. (Fig. 1045.) 

 In large dense tufts with- 

 out rhizomes; culms stout, 

 1 to 2 m tall ; blades narrow, 

 firm, strongly involute; 

 spikes short and appressed, 

 closely imbricate, forming 

 a dense cylindric inflor- 

 escence 10 to 30 cm long; 

 spikelets closely imbricate, 

 6 to 8 mm long; glumes 

 hispid-cilia te on the keel, 

 the first shorter than the 

 lemma, the second usual- 

 ly a little longer. 91 (S. 

 junciformis Engelm. and 

 Gray.) Marshes, swamps, 

 and moist prairies near the coast, Florida 

 to Texas and eastern Mexico (fig. 1046). 



6. Spartina bakeri Merr. (Fig. 1047.) In large dense tufts 

 without rhizomes; culms stout, 1 to 2 m tall; 



blades 4 to 8 mm wide, involute or occasion- 

 ally flat; inflorescence 



12 to 18 cm long, the 



spikes 5 to 12, 3 to 6 cm 



long, appressed ; spikelets 



closely appressed, 6 to 8 



mm long; glumes scabrous, 



hispid-cUiate on the keel, 



the first about half as long 



as the lemma, the second 



longer, acuminate. 91 



Sandy soil, South Carolina, Georgia, and 

 Florida. 



7. Spartina gracilis Trin. ALKALI CORDGRASS. FIGURE m5.spartina 

 (Fig. 1048.) Culms 60 to 100 cm tall; blades HSSiAT? 

 flat, becoming involute, 15 to 20 cm long, very 



scabrous above, mostly less than 5 mm wide; spikes few, 4 to 8, 



w. 



FIGURE 1042. Spartina leian- 

 tha. Panicle, X 1; spikelet, 

 X 5. (Heller 13871, Calif.) 



FIGURE 1043. Spartina alter- 

 niflora. Panicle, X 1; spike- 

 let, X 5. (Scribner 155, 

 Maine.) 



FIGURE 1044. Distribution of 

 Spartina alterniflora. 



