122 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



to a long spiny point; flowers purple ; corolla with tube four-fifths of the 

 throat and divisions ; throat about one-third of the tube, divisions linear, 

 abruptly acuminate, 18 mm. long; stamens surpassing the corolla ; node of 

 the stigma 2 mm. from the apex ; coma 2^ cm. long. 



Willow Creek, San Juan Co., Utah, Aug. 13, 1895. 

 3. Cnicus Hesperius, sp. nov. 



Stem stout, simple, erect, leafy from the base, ribbed, almost glabrous, 

 3-4 dm. in height, 2 cm. in diameter : leaves 10-15 cm. long, 1)^-2 cm. wide, 

 upper surface glabrous, lower tomentose, ascending, linear-lanceolate, with 

 numerous rounded lobes, spiny-margined with two to three large, yellow, 

 subulate spines, 5 mm. long, and several shorter ones : heads sessile, 

 crowded, in an oblong, terminal, erect, leafy, glomerule ; involucre 2 cm. 

 long, 2>4 cm. wide, with bracts 3 mm. broad at the yellow, glabrous, ovate 

 base, tapering to a long brown-purple spine i cm. long, arachnoid with silky 

 wool except at the glabrous yellow apex : flowers light purple ; corolla tube 

 almost equalling the throat and divisions; throat fusiform, contracted under 

 the divisions which are linear with thickened apex and about half as long 

 as the throat ; anthers surpassing the petals by 3 mm., sparingly arachnoid 

 except at the pointed tips ; style with inconspicuous node concealed by the 

 anthers and stigma, exserted 2 mm. ; coma i cm. long. 



Mt. Hesperus on the Bear Creek Divide above timber 

 line. La Plata Mountains, southwestern Colorado, Aug., 

 1892. Collected by the writer. 



This Cnicus is nearest to C . criocephalns Gray, under 

 which it was placed by the writer in "Zoe," Vol. IV, p. 8. 

 A recent inspection of the specimens of Cnicus in the Her- 

 barium of the Academy has convinced me that this deserves 

 to have specific rank and that it is not a hybrid with Cnicus 

 Parryi, as I had formerly conjectured. 



The involucral bracts are less densely tomentose than in 

 C. eriocep/ialus, the glomerule erect, the flowers light pur- 

 ple or pink, the entire plant less arachnoid, and the stamens 

 have not only the filaments wooly but also the anthers. 



I have named it in honor of the mountain on which it is 

 found, the highest in the La Plata Range. There were 

 few individuals growing along the trail leading to the sum- 

 mit of the ridge. 



