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



Panicle subpyramidal, rather open..... 2. C. brevipilis 



Rhizomes extensively creeping. 



Lemma glabrous (except for the callus hairs) 3. C. loxgifolia 



Lemma Pilous on the back above the callus hairs 4. C gigantea 



Figure 452. — Ammophila brevilignlata. Plant, X x /2\ 

 spikelet and floret, X 5. (Sherff, Ind.) 



1. Calamovilfa curtissii (Vasey) 

 Scribn. (Fig. 454.) Culms tufted from 

 a short, thick horizontal rhizome, 

 about 1 m. tall; lower sheaths firm, 

 overlapping, persistent; blades elon- 

 gate, 2 to 3 mm. wide, flat to involute, 

 those of the innovations subfiliform; 

 panicle contracted but not dense, 15 

 to 20 cm. long; spikelets pale, about 

 5 mm. long; glumes acute, the first 4 

 mm., the second 5 mm. long; lemma 

 as long as the second glume, acute, 

 villous on the back below, the callus 

 hairs 1 to 1.5 mm. long; palea sparsely 

 villous along the keels. % — Low 

 pine barrens, northern Florida. 



