264 Contributions to Western Botany. [zoe 



valleys and abounds in western Utah and eastern Nevada at 

 elevations from 4300 to 5500 feet. If these distinctions given to 

 uphold the species fail, then this species cannot be maintained. 



Townsendia sericea Hooker. A form of this in the Herbarium of 

 the California Academy collected by Greene in New Mexico, local- 

 ity not given, has the scales of T. Rothi'ockii and the pappus and 

 leaves of T. Wilcoxiana, tending to confirm a suspicion which I 

 have long entertained that these two species are only sports of T. 

 sericea, and are not valid. A form collected by Miss Eastwood 

 at Mancos, southwestern Colorado, June, 1891, shows an approach 

 to T. incana. The rays of T. sericea are glabrous. 



Townsertdia incana, Nutt. As I have alreadj?^ indicated T. 

 Arizonica is a form of this species, being separable only by the 

 pappus a worthless character. In looking over my material 

 from Milford, Utah, 1880, and named by Gray himself, I find 

 that the pappus of the ray is often one-half that of the disk and 

 the heads are often short peduncled with all sorts of transitions 

 between, the rays are glabrous except very minute atoms 

 scattered over them. True T. incana usually grows in smaller 

 mats in lower elevations and has the rays pubescent with 

 flattened hairs which are tipped with yellow gland-like enlarge- 

 ments. It is very common in the Sonoran region of eastern 

 Utah and southwestern Colorado, and blooms in May and June. 

 An interesting form of this species is — 



Townsendia incana Nutt. var. anibigua, n. var. This 

 would suggest T. grandiflora in some things. Short-lived per- 

 ennial but blooming the second year; leaves spatulate, acute, 

 gradually narrowed into a long petiole one to one and one-half 

 inches long; heads ebracteate, from sessile to peduncled, peduncle 

 being sometimes three inches long, one-half inch high or more, 

 one-half inch to an inch wide; bracts in two to three series, 

 acute. In all the specimens which I have seen, the pappus is 

 in the ray flowers less than one-third that of the disk flowers, of 

 single scales that are very narrow and bristle-like; otherwise 

 exactly as in the species, except that it is less branched than 

 the type. Common with the type in the same region as the 

 type. It blooms from the middle of April to June. Collected 



