148 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
rounded or truncate at apex; spurs light red, stout, 22 to 24 mm. long, contracted 
rather abruptly 6 or 7 mm. from apex, the knob of nectar gland large, the tips often 
more or less incurved; styles about 12 mm. long; ovaries viscid-pubescent. 
Type in the U. 8. National Herbarium, no. 718899, collected in moist places in 
Outlaw Canyon, Chiricahua Mountains, southern Arizona, July 30, 1907, by L. N. 
Goodding (no, 2325). 
RanGe: At lower elevations in southern Arizona and western New Mexico, north 
into western Colorado. . 
SPECIMENS EXAMINED. 
Arizona: Between Barfoot and Idas peaks, Chiricahua Mountains, Blumer 1475, 
Asplenium Canyon, Mule Mountains, Goodding 998. Barfoot Peak, Chiricahua 
Mountains, Blumer 1441. Manning Camp, Rincon Mountains, Blumer 3591, 
Sitgreaves Camp, White River, Goodding. Near Flagstaff, Leiberg 5858, Mac- 
Dougal 134 (?). 
New Mexico: Bear Mountain, near Silver City, Metcalfe 162. Balsam Park, Sandia 
Mountains, Ellis 47. Sandia Mountains, Wooton. 
Cotorapo: Glenwood Springs, Osterhout 1951. 
This seems to be one of the most distinct species of the canadensis group of the 
Rhodanthae. Strangely enough, the less well marked forms have been the first to 
be characterized, and although this species has been collected from time to time, it 
has always been placed under other names. The extreme differentiation of A. tri- 
ternata occurs in southern Arizona. This species is chiefly characterized by its 
extremely triternate leaves, its large, light red flowers, resembling those of A. cana- 
densis in form, its stout, abruptly contracted spurs, and its copious pubescence. 
This last character is well marked and quite constant in appearance in the specimens 
from southern Arizona, but is often almost entirely lacking in plants from New Mexico 
and western Colorado. The species may be found to merge into canadensis in New 
Mexico. 
13. Aquilegia desertorum (Jones) Cockerell, Muhlenbergia 1: 27. 1901. 
Aquilegia formosa desertorum Jones, Contr. West. Bot. 8: 2. 1898. 
Stems slender, glandular-hairy above, about 30 cm. high; basal leaves biternate, 
rarely over one-third as long as the stems; leaflets small, rather thick. pubescent, 
glaucous on both surfaces; cauline leaves several; bracts once or twice ternate; flowers 
nodding, 3.5 to 4 cm. long, 1.5 to 2 cm. across; sepals dark red, elliptic-lanceolate, 
about 1 cm. long, spreading, exceeding blade of petals about 3 mm.; lamin yellow, 
rounded, about 5 mm, long; spurs light red, straight, slender, 22 to 25 mm. long; 
ovaries pubescent; styles about 10 mm. long; follicles 1.5 to 2 cm. long, the tips 
widely spreading. 
Known only from the type specimen, Jones, August 29, 1884, Flagstaff, Arizona, 
and from MacDougal 327, Walnut Canyon, same vicinity. 
Grows in rock crevices near springs. A close relative of A. elegantula, but distin- 
guished from it by the smaller leaflets which are glaucous on both surfaces, the presence 
of true cauline leaves in addition to the bracts, and the dark red, spreading sepals. 
Professor Cockerell says, in comparing this species and A. elegantula, that ‘A. elegan- 
tula is properly a forest loving species of higher altitudes, essentially a mesophytic 
plant. A. desertorum, as its name indicates, is xerophytic, living on rocky slopes in 
the transition zone, and is remarkable for its enormous root and long life * * * 
the plant comes into flower long before the other Rocky Mountain species * * *,’? 
Professor Cockerell has published! a hybrid between desertorum and chrysantha. 
In color of flowers and time of flowering the hybrid is intermediate between the two 
parents, but Professor Cockerell says that ‘‘the form of the flowers departs from both 
parents in the direction of the A. vulgaris group.” 
1 Bot. Gaz. 62: 413. 1916. 
