MEMOIRS FROM THE DEPARTMENT OF BOTANY OF COLUMBIA UNIVERSITY 199 



Basal leaves with petioles 2-10 cm. long, pinnate, sometimes interruptedly so; leaflets 3 

 or 4 pairs, sparingly hairy, nearly glabrous on the upper surface ; leaflets obovate, gener- 

 ally obtuse, simply or doubly serrate with broad teeth, the upper generally a little larger^ 

 1-3 cm. long. Stem leaves smaller, short-petioled, 1-3 paired. Flowers in an open many- 

 flowered cyme, 10-15 mm. in diameter. Hypanthium glandular-hirsute; bractlets linear- 

 lanceolate, much shorter than the oblong or ovate-lanceolate, gradually acuminate, acute 

 sepals, which in fruit are about 1 cm. long. Petals obovate, about equalling the sepals. 



Resembles D. glutinosa in the open many-flowered cyme and general habit, but is a 

 much more slender plant. It resembles D. fissa in the leaves, the long sepals and the 

 shorter glandular pubescence, which is sometimes rather sparse. It differs from both by 

 its petals, which are obovate, flat and about equal the sepals. Next to D. arguta, it is the 

 most common and has the widest range of the genus. It extends from British Columbia 

 and Alberta to the Black Hills of South Dakota and the foothills of New Mexico and 

 California. 



Suksdorf has collected a plant in West Klickitat Co., Wash., which agrees perfectly 

 with D. glandulosa, except that the petals are very small, obovate-spatulate and white, 

 and the sepals approach those of D. Wrangelliana in form. 



Drymocallis glandulosa incisa (Lindl.). 

 Potentilla glandulosa var. incisa Lindl. Bot. Reg. pi. 1973. 1837. 

 Torr. & Gray, Fl. N. Am. 1 : 446 ; Lehm. Rev. Pot. 48 ; Walp. Ann. 2 : 476. 

 Illustration : Lindl. Bot. Reg. 23 : pi. 1973. 

 Leaves incised with very sharp teeth. Specimens examined : 

 Washington: W. H. Suksdorf, No. 2307, 1894. 

 Oregon: W. H. Suksdorf, No. 415, 1877. 

 California: Michener & Bioletti, 1893; J. Torrey, 1865. 

 Idaho: Watson, No. 113, 1880. 



Drymocallis glandulosa monticola. 



Potentilla glandulosa var. Nevadensis Wats. Bot. Cal. 1: 178 (in part) 1876. Not Po- 

 tentilla Nevadensis Boiss. 



Rothrock, Wheeler's Rep. 4 : 112 ; Rattan, Key W. Coast Bot. 51 ; Vasey & Rose, 

 Cont. U. S. Nat. Herb. 1:6; Greene, Fl. Fran. 1: 65. 



More slender than the type ; stem leaves reduced in size ; leaflets smaller ; stem^ more 

 finely and densely pubescent upward ; cyme more contracted and few-flowered, and sta- 

 mens often only 20. 



I regard this as a mountain variety of D. glandulosa rather than a distinct species. It 



