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 Jess 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 12 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. 
WasHINcTon: Montesano, 1898, 4. A. & E. Gertrude Heller, 
3936 (type in herb. N. Y. Bot. Garden); upper valley of the 
Nesqually, 1896, O. D. Allen, 249; 1889, G. R. Vasey, 150; 
Humptulips, 1895, F. H. Lamb, 1180; Puget Sound, Wilkes 
Exped., 646. 
British Cotumsra: Banff, 1897, Zoe W. Palmer. 
ALaska: Short Bay, 1895, Gorman, 105, Disenchantment 
Bay, 1892, F. Funston, 121. 
IDAHO: Florida Mt., 1892, A. /sabel Mulford. 
 Aquilegia thalictrifolia 
Perennial with a short rootstock; basal leaves twice ternate ; 
Petioles 1-2 dm. long; segments broadly obovate-cuneate, 2—3- 
cleft and crenate at the apex, I-1.5 cm. long, bluish-green: stem 
2-5 dm. high, glabrous below, finely viscid puberulent above: 
Stem-leaves subsessile 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 
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