Bush — North American Species of Triodia. 73 



purple ; sheaths of the basal leaves crowded, somewhat com- 

 pressed, closely imbricated, sparsely to densely pilose with 

 long white hairs ; upper leaf sheath shorter than the inter- 

 nodes, glabrous or pilose at the throat ; ligule a dense fringe 

 of very short white hairs ; blades of the radical leaves about 

 5 mm. wide, alternate, acuminate, and involute toward the 

 apex, shortly pilose below near the apex; uppermost cauline 

 leaf 4 cm. long or less; panicle 18-24 cm. long, contracted, 

 somewhat drooping, simple, the appressed rays solitary, the 

 lowermost 2.5-5 cm. long, slightly glandular, but not villose, 

 in the axils; spikelets commonly 3-flowered, 8-10 mm. long ; 

 lower scales ovate-acute, 1-nerved, whitish or purplish, except 

 the prominent nerve, 4-5 mm. long, subequal ; first flowering 

 scale 5-6 mm. long, ovate-lanceolate, trifid, 3-nerved, the 

 nerves extending into short, awn-like teeth, the central one 

 equaling or a little exceeding the narrow obtuse lobes of the 

 scale, nerves ciliate in the lower half with rather long, erect 

 white hairs ; palet slightly shorter or a little longer than the 

 scale, oblanceolate, obtuse, minutely ciliate along the keels to- 

 wards the apex. Dry soil in low pine barrens. July to 

 October. Perennial. 



Louisianian area. South Carolina and Georgia to Florida 

 and Mississippi. 



Type locality: "Jacksonville, Fla., Drummond; Aiken, 

 S. Carolina, Ravenel; Biloxi^ Miss., Kearney ^ 324. 1896. 

 There is also a specimen in the National Herbarium from 

 Georgia without locality." 



Specimens EXAMINED. — Mississippi: Manuel, Tracy, 4560, 1898. — 

 South Carolina: kVuftn, Bavenel. 



14. Triodia Elliottii B. F. Bush. 



Poa ambigua Ell. Sk. 1 : 165, 1817, not Triodia ambigua, R. Br. 1810. 

 Tricuspia ambigua (Ell.) Chapm. S. Fl. 569. 1860, not Triodia ambigua R. 



Br. 1810. 

 Triodia ambigua (Ell.) Benth. ex Vasey, Qr. U. S. 35. 1883, not Triodia 



ambigua R. Br. 1810. 

 Sieglingia ambigua (Ell.) O. Kuntze, Rev. Gen. PI. 2 : 789. 1891, not 



Triodia ambigua R. Br. 1810. 



Culms 4-8 dm. tall, simple. Leaves attenuate, 1-3 dm. 

 long; panicle 1-2 dm. long, open, branches spreading; 



