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



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

 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 spar tin a e 

 (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-ciliate on the keel, 

 the first shorter than the 

 lemma, the second usual- 

 ly a little longer. % (S. 

 x°5. ^SftSySSS' JunciformisEngelm. 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. % — 



Sandy soil, South Carolina, Georgia, and 

 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 to 8, 



Figure 1042.— Spartina Man- 



Figure lOiZ.— Spartina alter- 

 niflora. Panicle, X 1; spike- 

 let, X 5. (Scribner 155, 

 Maine.) 



Figure 1044.— Distribution of 

 Spartina alterniflora. 



Figure 1045.— Spartina 

 sparlinae. Panicle, 

 X 1; spikelet, X 5. 

 (Hitchcock, Tex.) 



