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



longer than the lemma; floret sparingly pilose or glabrous. 01 — 

 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 

 part of the range of the species the spike- 

 lets 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 

 (Trim) 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-ciliate on the keel, 

 the first shorter than the 

 lemma, the second usual- 

 ly a little longer. 01 (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-ciliate on the keel, 

 the first about half as long 

 as the lemma, the second 

 longer, acuminate. 01 ■ — 

 South Carolina, Georgia, and 



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. 



Sandy soil, 

 Florida. 



7. Spartina gracilis Trin. Alkali cordgrass. 

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

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

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



Figure 1045.— Spartina 

 spartinae. Panicle, 

 X 1; spikelet, X 5. 

 (Hitchcock, Tex.) 



to 8, 



