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



glabrous spikelets has been differen- 

 tiated as S. alterniflora var. glabra 

 (Muhl.) Fernald; that with sparsely 

 pilose spikelets as S. alterniflora var. 

 pilosa (Merr.) Fernald. 



5. Spartina spartinae (Trin.) 

 Merr. (Fig. 745.) In large dense tufts 

 without rhizomes; culms stout, 1 to 

 2 m. tall; blades narrow, firm, strongly 

 involute; spikes short and appressed, 

 closely imbricate, forming a dense 

 cylindric inflorescence 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 usually a little 

 longer. % (S. junciformis Engelm. 

 and Gray.) — Marshes, swamps, and 



Figure 744. — Spartina al- 

 terniflora. Panicle, X 1; 

 spikelet, X 5. (Scribner 

 155, Maine.) 



a little 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; 

 recently introduced in oyster culture, 

 Pacific County, Wash., and spread- 

 ing;. Atlantic coast of Europe. Through 

 the southern part of the range of the 

 species the spikelets are often more 

 imbricate. The imbricate form with 



Figure 745. — Spartina spartinae. Panicle, 

 X 1; spikelet, X 5. (Hitchcock, Tex.) 



Figure 746. — Spartina bakeri. Panicle, X 1; spikelet, 

 X 5. (Type.) 



moist prairies near the coast, Florida 

 to Texas and eastern Mexico. 



6. Spartina bakeri Merr. (Fig. 746.) 

 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 ap- 



