56 UNIVERSITY OF COLORADO STUDIES 
RANUNCULACEAE, Crowroot FAmIty 
Clematis ligusticifolia Nutt. Vrrcin’s Bower. 
Climbing over trees and bushes along streams and in canyons. 
Altitude: 4,900 to 7,000 ft. Collections: near Boulder; Sunshine Canyon; St. 
Vrain Creek below Lyons. 
BERBERIDACEAE, BarBERRY FAMILY 
Berberis aquifolium Pursh. OREGON GRAPE 
A low, trailing undershrub with leaves resembling holly. Mostly on south slopes 
in exposed situations. 
Altitude: 5,000 to 9,500 ft. Collections: near Boulder; South Boulder Creek; 
“near Boulder” (Rydberg). 
HYDRANGEACEAE, HyprancEA FAMILY 
Edwinia americana (T. and G.) Heller. Wax FLOWER 
A handsome shrub of rather dry and exposed rocky places. 
Altitude: 5,500 to 10,000 ft. . Collections: Sunset; Head of Gregory Canyon; Boul- 
der Falls; Sugarloaf Mountain; Eldora; foot of Long’s Peak; “Eldora to Baltimore” 
(Rydberg). 
GROSSULARIACEAE, GoosEBERRY FAMILY 
Ribes lentum (Jones) Coville and Rose. 
Altitude: 8,000 to 11,000 ft. Collection: ‘“Eldora to Baltimore” (Rydberg). 
Ribes longiflorum Nutt. FLOWERING CURRANT 
A shrub with a profusion of yellow flowers in early spring. Along creek flood-plains 
and canyon mouths. 
Altitude: 5,000 to 6,000 ft. Collections: north of Boulder; mouth of Gregory 
Canyon; “Boulder” (Rydberg). 
Ribes parvulum (A. Gray) Rydberg. 
A low trailing shrub growing usually in moist places. 
Altitude: 8,000 to 11,500 ft. Collections: Redrock Lake, west of Ward; Fourth 
of July Mine. 
Ribes pumilum Nutt. Witp CuRRANT 
Among rocks on hillsides. 
Altitude: 5,000 to 10,000 ft. Collections: South Boulder Canyon; Sunshine Can- 
yon; Copeland’s; ‘near Boulder’? (Rydberg). 
Ribes purpusi Koehne. GoOSEBERRY 
In somewhat moist situations in gulches and along streams. 
Altitude: 6,000 to 10,000 ft. Collections: Boulder County; South Boulder Canyon, 
altitude 6,800 ft.; “between Sunshine and Ward” (Rydberg). 
Ribes vallicola Greene. GooSEBERRY 
Along streams and in gulches. 
Altitude: 5,000 to 9,000 ft. Collections: St. Vrain Creek below Lyons; Pine Glade 
School. 
ROSACEAE, Roser Famity 
Cercocarpus parvifolius Nutt. Mountain MAHOGANY 
On dry hillsides and ridges sometimes forming a rather dense “scrub.” 
