N...1230. A REVISION OF CERTAIX ANTENNARLE— NELSON. 713 



on somewhat immature specimens, the heads not being fully developed. 

 jNIaturer specimens have been collected by Leslie Goodding- (no. 7288 

 of the Rocky Mountain Her])arium) in the Laramie Hills, southern 

 Wyoming-, June 12, 1900. Dr. Rydherg's no. 795 from the Black Hills 

 exemplify the species in its mature condition, and John Macoun has 

 secured it at Deer Park, Lower Arrow Lake, British Columbia, 1890. 



an. Leaves comparatively large. Segregates of the A. plantaginifolia of the Synoptical 

 Flora; western allies of A. neglecta. Only the fertile plants known. 



32. Antennaria obovata E. Nelson, Bot. Gaz. 27:213. 1899. 



Two to 3 du), high; leaves permanently tomentose on both surfaces, 

 3-5 cm. long-, the blade cuneate-obovate, obtuse, and about 13 mm. 

 broad. 



Ti/pe Jocality. — "Near Soldier Canon,'" Colorado. C'ollected by 

 Cowan; type in the herbarium of Colorado Ag-ricultural CoUeg'e. 



Foothills along the eastern base of the mountains in Colorado and in 

 the Black Hills of South-Dakota (Forwood no. 228a, Rydberg no. 793). 



33. Antennaria pedicellata Greene, Pittonia 3: 175. 1897. 



Like A. hotrflHi^ l)ut leaves smaller, o])lanceolate, acute, with no 

 distinction of blade or petiole and permanently tomentos*^ on both 

 surfaces. 



Type locality. — "Blue Mountains of Oregon."''' Collected by Howell, 

 no. 1522; type in the her))arium of E. L. Greene. 



A little-known species, closely related to the following. The tvpe 

 specimen is quite noticeably glandular on the leaves, stem, pedicels, 

 and outer })racts of the involucres. G. R. Vase3"\s«no. 485, from Wash- 

 ington, seems to belong here. 



31:, Antennaria howellii Greene, Pittonia 3:171. 1897. 



Two to 3 dm. high; stolons slendtn- and prostrate; leaves usually 

 distinctly petioled with cuneate-ol)ovate, acute or acutish blades, 

 glabrous above or nearly so, 3-5 cm. long. 



Type locality. — "Mt. St. Helen, Oregon."" Collected by Howell; 

 type in the herbarium of E. L. Greene. 



Oregon to British Colum])ia and eastward to western Montana. 



Typical specimens have leaves which are glabrous above but plants 

 with the leaves arachnoid on the upper surfaces are not uncommon. 

 The heads are often on pedicels as long as those of A. p)ediceUata. 



35. Antennaria petasites Greene, Pittonia 3: 277. 1898. 



Eighteen to 27 cm. high; cauline leav(>s, ample, green, and glabrous 

 above, 2-3 cm. long, 5 nun. broad; heads panicled, the panicle con- 

 spicuously leafy-bracted. 



Ty2)e locality. — "Sterile knolls and banks. Drew's Harbour. British 

 Columbia." Collected by Dawson; type in the herbarium of the Geo- 

 logical Survey of Canada (sheet no. 11292). 



The type consists of two plants without radical leaves or stolons. 

 The species ajipoar to be related to A. hoiijellii., whose cauline leaves 

 are small and inconspicuous. 



