106 



MISSOURI BOTANICAL GARDEN. 



eastern Dasystoma T 



(L.) Britton, which we 



have not seen from west of the Mississippi, by its much 

 more divided leaf-blades which are scabrous-pubescent 

 above, its very narrow corolla tube and especially by its 

 long calyx teeth, the eastern plant having short triangular 

 or short oblong calyx teeth, which are shorter than the 

 body of the calyx. 



Spec 



examined. 



B 



Missouri: Montoer, Shannon 

 , 1899, type, 722, August 21, 

 1901; Bay Mills, Ripley County, Mackenzie 412, July 

 24, 1897; Hunter, Trelease, July 31, 1895; Pilot Knob, 



Rit8*eU t September, 1897; Glatfelter, August 20, 1895; 

 Einstein Mine, Madison County, Trelease 529, August 18, 



1897; Flat River, St. Fr 





October 13, 1897; 



S 



County, T\ 



530, 



ft 



1897 



Ark 



ber, 1835; 



Little Mamelle, E 



ook, Hasse, Septem 



■© 



Septem- 



e 



n 



20, 1885. 



Xanthium inflexum Muck. & Bush,sp. nova. 



Xanthium speciosam M. & B., Man. Fl. Jackson County, Mo. 187. 



(11)02), not of Kearney. 



i 



Glabrate, or the upper part from sparingly to strongly 

 roughened with small white papillae. Stems 1 to 1.5 m. 

 tall, upright, much branched; leaf-blades cordate or ovate- 

 cordate, strongly irregularly crenate-dentate, 3-lobed, the 



middle lobe much the largest, in outline resembling 1 the 



leaf of Malva sylcestris L., strongly acuminate, from nearly 

 glabrous to roughened below, slightly roughened above; 

 petioles 5 to 15 cm. long, rather slender, strongly rouo-h- 

 ened with small white papillae; burs densely clustered, 

 2.5 cm. or less long, glandular-pubescent or glandular 



short-pubescent all over the body and the lower part of 

 the prickles and beaks, never hispid, the body oblong- 

 elliptical, 2 cm. or less long, and less than half 'that in 

 width, somewhat tapering at the base ; prickles longer than 

 the diameter of the body of the bur, numerous, rather 



l 



