MANUAL OF THE GRASSES OF THE UNITED STATES 



513 



pressed, 6 to 8 mm. long; glumes sca- 

 brous, hispid-ciliate on the keel, the 

 first about half as long as the lemma, 

 the second longer, acuminate. % 

 — Sandy soil, South Carolina, Geor- 

 gia, and Florida. 



7. Spartina caespitosa A. A. Eaton. 

 (Fig. 747.) Culms 70 to 100 cm. tall, 

 erect, from coarse widely spreading 

 rhizomes or tufted, the rhizomes 

 nearly wanting; blades 10 to 40 cm. 

 long, 3 to 7 mm. wide, flat or becom- 

 ing involute, scabrous on the upper 

 surface and margins; spikes 2 to 7, 

 3 to 9 cm. long, finally spreading, 

 rather distant; glumes acuminate, 

 aristate, conspicuously hispid-ciliate 



Figure 747. — Spartina caespitosa. Panicle, 

 spikelet, X 5. (Type collection.) 



X 1 



Figure 748. — Spartina gracilis. 

 Panicle, X 1; spikelet, X 5. 

 (Rydberg 2080, Mont.) 



on the keels, the second 12 to 16 mm. 

 long; lemma about 8 mm. long, mi- 

 nutely lobed. % — Salt marshes 

 near the coast, New Hampshire to 

 Maryland. 



8. Spartina gracilis Trin. Alkali 

 cordgrass. (Fig. 748.) Culms 60 to 

 100 cm. tall; blades flat, becoming in- 

 volute, 15 to 20 cm. long, very sca- 

 brous above, mostly less than 5 mm. 

 wide; spikes 4 to 8, closely appressed, 

 2 to 4 cm. long; spikelets 6 to 8 mm. 

 long; glumes ciliate on the keel, 

 acute, the first about half as long as 

 the second; lemma nearly as long as 

 second glume, ciliate on the keel; 

 palea as long as lemma, obtuse. % 

 — Alkaline meadows and plains, Sas- 

 katchewan to British Columbia, 

 south to Kansas and New Mexico, 



