527 
2, T. interruptum Buckl. Culins 5 to 5 din. high, often branching below: leaves 
narrow, mostly flat, 5 to 15 cm, long, usually interrupted: spikelets 2 to 4-flowered, 
4 to5 mm, long; empty glumes equal, broadly oblanceolate, acute.—Prairies, central 
and northern Texas. 
40. CAPRIOLA Adans. 
Spikelets 1-flowered, with a naked rudiment of a second, sessile, 
imbricate-spiked on one side of a flat rachis: spikes digitate at the apex 
of the culm: empty glumes subequal, carinate, shorter than the floret; 
floral glume deeply carinate, awnless, slightly longer than the palet.— 
Low branching extensively creeping perennials. (Cynodon Pers.) 
1. C. Dactylon (L.) Kuntze. (BERMUDA Grass.) Culms 2 to 6 dm. high: leaves 
narrow, short and flat: spikes 2 to 5,3 to 8 em. long: spikelets 2mm. long; floral 
glume nearly smooth, longer than the rudiment. (Panicum Dactylon L., Cynodon 
Dactylon Pers. )—Introduced and extensively naturalized. A valuable grass in lawns 
and permanent pastures. 
41. SPARTINA Schreber. (CORD-GRASS. ) 
Spikelets 1-flowered, narrowly linear, closely imbricate-spiked in 2 
ranks on one side of a flattened or triangular rachis: spikes racemose 
on an elongated axis: outer glumes coriaceous, carinate; the first 
shorter than the floret; the second equaling or exceeding the floret; 
floral glume subcoriaceous, carinate, awnless, exceeded by the broad 
hyaline palet.—Rush-like marsh grasses, with terete rigid culms and 
involute leaves, from perennial scaly rootstocks. 
* Glumes hispid on the keels. 
+ Spikes appressed in a spike-like pa nicle. 
1. S. gracilis Trin. Culms about 1 in. high, leafy: leaves closely involute, 2to5 
dm. long: panicle 1 to 3. din. long: spikes 15 to 40, sessile, about 2 em. long: spikelets 
5 to 7 mm. long; glumes subobtuse ; the first three-fourths as long as the second, 
slightly shorter than the floret. (Spartina junciformis Engelm, & Gray.)—Low land 
and salt marshes, southern Texas to Florida. 
+ + Spikes divergent. 
2. S. patens (Ait.) Muhl. (RusH SALT-GRASS.) Culms 6to 10 dm. high, smooth 
and shining: leaves narrow, closely involute, 1 to 3dm. long: spikes 5 to 8, short- 
peduncled or nearly sessile, 4 to Sem. long, slightly exceeding the intervals: spike- 
lets $ to 10 mm. long; glumes acute; the first one-third as long as the second and 
about one-half as long as the floret. (Dactylis patens Ait., Spartina juncea Willd. )— 
Salt marshes, eastern Texas to Florida. 
* * Glumes smooth. 
3. S. stricta (Ait.) Roth. (SaLr MARSH-GRASS.) Culms robust, abont 1 m. high, 
leafy : leaves closely involute toward the points: spikes 6 to 10, exceeding the inter- 
vals, 5to 10cm. long, erect or somewhat spreading; smooth rachis extending beyond 
the spikelets: spikelets about lem. long; first glume about one-half as long as the 
second. (Dactylis stricta Ait,)—Salt marshes, mostly near the coast, 
