136 



23- P- ALBA, Nutt. Genera, ii. 87. (18 18). 



P. Seneca^ var. tenidfolia. Pursh, 750, (18 14), not P. ten- 



uifolia, Willd. 

 P, bicolo)\ H. B. K. Nov. Gen. v, 394. t. 507, (182 i). 

 P, Torrcyiy Don, Gardener's Diet., i. 360, (1831). 

 P. Beyrichii. Torr. and Gray, F"l. N. A. i. 130, (1838). 

 P. scoparia, Benth. PI. Hartw. 8, (1839), not H. B. K. 

 P. aparinoidcsy Hook, and Arn. Rot. Reechey, 277, (1841) 



fide Seemann. 

 Glabrous throughout; stents several or many from a \vood\' 

 rootstock, erect or ascendinjj, straii^ht or somewhat curved, 



an<j:led or errooved, 6'- 18' hisj'h, In most cases sim- 



fa'^" w. ^ 





pie, occasionally sparingly branched above; leaves alternate, 



acute, linear, linear-lanceolate or linear-subulate, ^'-i' long", 

 or in some cases a few of the lower ones 2"-3" long, oblance- 

 olate, in apparent whorls; spikes conical, in some cases race- 

 mose, often long-peduncled, 2"-3" in diameter at base, ^'-2' 

 long; bracts deciduous, the axis of inflorescence at length 

 often much elongated, scarred; flowers white, on pedicels about 

 3^" long; wings obovate or oval, i'^'i}4'^ long; crest of keel 

 fimbriate, the processes rather long and narrow; stamens 

 eight in number; style short, minutely auriculate above the 

 middle and above the pedicelled stigmatic gland, termlnatin 



■ 



above in a filiform, minutely tufted appendage; mature cap- 

 sule more or less ovoid, ["-i^^" long; seeds obovoid, hard- 

 ly curved, covered withappressed silky hairs, the twocaruncle- 



F 



lobes about half as long as the seed. 



Loidsiana, — 1842, Dr. C. W. Short, (dist. as P, leptocaulis, 

 T. and G.); Bradbury, (dist. as /*. Seneca, var. tomlfolia, 

 probably Pursh's specimen). Arkansas. — ex Herb. Beyrich. 

 Misso7tri. — ^^Nuttall, (type); '' Upper Missouri/' 1853, Dr. Suck- 

 ley; *^ Upper Missouri," 1874, Dr. Cowes; ''Banks of Mis- 

 souri," 1839, Nicollet's N. W. Exped., Chas. A. Geyer, No. 

 253. Texas, — -Wright; 1844, F. Lindheimer, No, 220; Drum- 

 mond. No. 27; Austin, Drummond, No. 4; Fort Worth, 1877, 

 Reverchon, Xo. 709; 1880, J. Reverchon, No. 64; '* Prairies 

 along the Rio Grande," 1844, Dr. Meyer; Tom Green Co.» 



^. 



