Studies on the Rocky Mountain Flora— VII 



By Per Axel Rydberg 



Aquilegia Columbiana 



Perennial with a short thick rootstock : stem 6-10 dm. high, 

 glabrous or sparingly and finely pubescent above; basal leaves 

 twice ternate ; petioles 1-2 dm. long ; segments rounded, obovate, 

 2-3 cm. long, more or less glaucous beneath, 2-3-cleft and deeply 

 crenate at the apex ; lower stem-leaves similar to the basal leaves, 

 but with short winged petioles, the upper similar but often with 

 larger segments : sepals and spurs very bright red ; laminae yel- 

 lowish : sepals ovate-lanceolate, acute, 15-25 mm. long, exceed- 

 ing the spur, widely spreading or reflexed : lamina very short, 

 scarcely 3 mm. long, truncate; spur 12-18 mm. long, thick, ab- 

 ruptly contracted about the middle : follicles erect, densely pubes- 

 cent ; styles about 1 2 mm. long. 



This species is somewhat intermediate between A. formosa and 

 A. truncata and has been mistaken for both. It has the habit, the 

 spur and sepals of the former and the short truncate lamina of 

 the latter. 



Washington: Montesano, 1898, A. A. & E. Gertrude Heller, 

 3936 (type in herb. N. Y, Bot. Garden) ; upper valley of the 

 Nesqually, 1896, 0. D.Allen, 2^g ; 1889, G. R. Vasey, 130; 

 Humptulips, 1895, F. H. Lamb, 1180; Puget Sound, Wilkes 

 Ex peel., 6^6. 



British Columbia: Banff, 1897, Zoe W. Palmer. 



Alaska: Short Bay, 1895, Gorman, 103; Disenchantment 

 Bay, i8g2, F. Fiinston, 121. 



Idaho: Florida Mt., 1892, A. Isabel Mulford. 



Aquilegia thalictrifolia 



Perennial wath a short rootstock : basal leaves twice ternate ; 

 petioles 1-2 dm. long; segments broadly obovate-cuneate, 2-3- 

 cleft and crenate at the apex, 1-1.5 cm. long, bluish-green : stem 

 2-5 dm. high, glabrous below, finely viscid puberulent above : 

 stem-leaves subses'sile or very short-petioled, otherwise similar to 

 the basal ones : flowers yellow: sepals 10—18 mm. long, ovate to 

 ovate-lanceolate, acute: laminae of the petals 7-12 mm. long, 

 truncate or rarely rounded at the apex ; spur very slender from 



145 



