Osterhout: New plants from Colorado 613 



pointed by slender spines, sessile by a clasping base and decurrent 

 on the stem for i cm.; all the leaves canescent beneath and with 

 slight tomentum above or glabrous ; heads several on leafy pedun- 

 cles, about 3 cm. high ; bracts in 5 series, lanceolate, entire, imbri- 

 cated in successive lengths, having some webby tomentum on the 

 edges, all tipped with small yellowish spines 5 mm. long, the 

 inner series with somewhat longer but weaker spines, the glandu- 

 lar ridge slight if any ; corollas very light-purple or whillsli ; pap- 

 pus whitish, plumose, 15 mm. long. 



This species is related to Carduus pulcliellus Greene, but the 

 leaves are much less divided, and the bracts are narrower and tlie 

 inner not so much elongated. Collected in North Park, Colorado, 

 at the base of the mountains, both on the east and west sides, 

 August 24-27, 1900. Type: Osterhout 2254., 



New Windsor, Colorado. 



