142 PANICACE^ 



The latter specimens are more slender in every way, not 

 producing panicles, a feeble growth reminding one of the sickly 

 growth of peach-trees having the yellows. 



South Carolina to Florida. 



67. P. Joorii Vasey, Bull. 8, U. S. Dept. Agric. 31 (1889). 

 Perennial; culms branching, 20-40 cm. high. Sheaths 



crowded and overlapping toward the top of the culm, ciliate on the 

 margins; ligule a mere ring; blades flat, linear-lanceolate or oval- 

 lanceolate, 6-10 cm. long, 1.3-2 mm. wide, wavy-margined, the 

 cordate base ciliate. Panicle often partly included, when exserted 

 ovoid, about 5 cm. long; rays bearing a few pedicelled spikelets 

 from base to apex. Spikelets linear to oval, acute, 3 mm. long; 

 first glume deltoid, 1.3 mm. long, obscurely 5-nerved; second and 

 third or floral glume of the lower floret oval, subacute, 9-nerved, 

 2.7 mm. long, its palea narrow and more than half as long; fertile 

 floret oval, 2 mm. long; floral glume and palea membranous, 

 rather soft. 



Mississippi, S. M. Tracy in 1888. 



68. P. xanthophysum A. Gray, Ann. Lye. N. Y. 3:233 (1835). 

 An erect yellowish - green perennial, sometimes sparingly 



branched near the base, 20-40 cm. high. Sheaths hairy, usually 

 covering all the culm, except above the upper leaf; blades 4-6, 

 smooth except the margins and the ciliate, bearded, clasping base, 

 lanceolate-acuminate, 9-11-nerved, 7-15 cm. long, 1-1.5 cm. wide. 

 Panicle erect, much exserted, very simple; branches appressed, 

 5-8 cm. long. Spikelets 5-15, broad-ovate, minutely downy, a 

 little over 3 mm. long; first empty glume ovate, acute, 3-5-nerved, 

 reaching near to the middle of the spikelet; second 9-13-nervedj 

 floral glume of sterile floret 9-nerved, its palea nerveless, 2. 5 mm. 

 long and when spread of equal width below; fertile floret smooth, 

 2.5 mm. long. 



New York, U. S. Dept. Agricul. 106 from Dudley; Vermont, 

 Pringle; New Jersey, Britten; New York, Clinton for Dr. Clark 

 2499; Michigan, Wheeler for ^L A. C. 19. 



Dry sandy soil, Massachusetts, New York, northern Michigan, 

 to Minnesota and northward, rare. 



