THE SILVA OF COLORADO 63 
Sambucus melanocarpa A. Gray. BLACK-BERRIED ELDER 
A medium-sized shrub with large, compound-pinnate leaves; on slopes and among 
rocks. 
Altitude: 8,000 to 9,500 ft. Collections: Sugarloaf Mountain; North Boulder 
Creek. 
Sambucus microbotrys Rydb. RED-BERRIED ELDER 
In somewhat moist soil among willows and aspens. 
Altitude: 7,500 to 12,000 ft. Collections: Spencer Mountain at Eldora; Silver 
Lake; foot of Long’s Peak; Redrock Lake, west of Ward; “between Sunshine and 
Ward” (Rydberg). 
Symphoricarpos occidentalis Hook. SNOWBERRY, INDIAN CURRANT 
A stout shrub with thick leaves and numerous small flowers in axillary clusters; 
these followed by small globular white berries. Along roadsides and edges of fields in 
slightly moist places. 
Altitude: 4,900 to 8,000 ft. Collections: near Boulder; South Boulder Creek; 
Mouth of Gregory Canyon; Boulder County; “Boulder; between Sunshine and Ward” 
(Rydberg). 
Symphoricarpos oreophilus A. Gray. INDIAN CURRANT 
Altitude: 7,500 to 10,000 ft. ‘“Eldora to Baltimore” (Rydberg). 
Symphoricarpos vaccinoides Rydb. INDIAN CURRANT 
A low shrub with small leaves, having somewhat the appearance of a huckleberry 
bush. Steep slopes and rocky places. 
Altitude: 7,000 to 10,000 ft. Collections: Sugarloaf; foot of Long’s Peak. 
Viburnum lentago Linn. SWEET VIBURNUM 
A small tree or shrub with ovate leaves, serrate margined; flowers in many-rayed 
cymes; the black stone-fruits are sweet and edible. 
Distribution probably rare and local, perhaps introduced. Collections: Bluebell 
Canyon; “gulch south of Boulder” (Rydberg). 
Viburnum pauciflorum Pylaie. HicH-BusH CRANBERRY 
This is a straggling shrub with three-lobed ovate leaves and cymes of small flowers. 
The red stone-fruits have an acid flavor with a fancied resemblance to that of cranberry. 
Altitude: about 8,000 ft. Collection: Sugarloaf Mountain. 
CARDUACEAE, TuistLE FAMILY 
Chrysothamnus graveolens (Nutt.) Greene. RABBIT BUSH 
A spreading shrub with long filiform leaves. In the spring of the year these plants 
look like straggling bushy pines. 
Altitude: probably from 4,g00 to 8,000 ft. Collections: “Boulder” (Rydberg). 
Seen by the writer on the end of a mesa south of the Chautauqua grounds near Boulder. 
