228 FRANGULACEAE. 



Umbels mostly terminal ; leaves dull beneath, glabrate or villous. 



ii. C. pubescens. 

 Umbels mostly axillary ; leaves silky beneath. 



Leaf-blades distinctly glandular-serrate ; plant not spiny. 3. C. subsericeus. 

 Leaf-blades obsoletely denticulate or entire; branches often ending in spines. 



4. C. Fendleri. 



1. Ceanothus velutinus Dougl. On hillsides from Mont, and B. C. to Colo, 

 and Calif. — Alt. 6000-7000 ft. — Headwaters of Clear Creek; near Empire; 

 Steamboat Springs; Walton Creek; Four- Mile Hill., Routt Co.; Sheephorn 

 Divide; between Pallas and Sydney; Poudre Cation; mountains between 

 Sunshine and Ward; Pinkham Creek; Beaver Creek. 



.i. Ceanothus pubescens (T. & G.) Rydb. (C. ovatus pubescens T. & G.) 

 In sandy soil from Mich, and S. D. to Mo. and Colo. — Alt. 4000-8000 ft. — 

 Foot-hills, Larimer Co. ; Colorado Springs ; Pennock's mountain ranch ; 

 Horsetooth Mountain; Monument; Boulder. 



3. Ceanothus subsericeus Rydb. Foot-hills of Colo. — Alt. about 6000 ft. — 

 Larimer Co. 



4. Ceanothus Fendleri A. Gray. In woods and on hillsides from S. D. and 

 Wyo. to N. M. and Ariz. — Alt. 5000-9000 ft. — Headwaters of Clear Creek; 

 Denver to Idaho Springs ; Sangre de Cristo Creek ; Mancos ; Pagosa Springs ; 

 Grayback mining camps and Placer Gulch; Boulder; west of Ouray; Mt. 

 Harvard; southeast of Ouray; Rist Cation; vicinity of Arthur's Rock, Lari- 

 mer Co. ; Leroux Creek ; Horsetooth Gulch ; Pennock's mountain ranch ; 

 Horsetooth Mountain ; mountains between Sunshine and Ward. 



Family 85. VITACEAE LindL Grape Family. 



Hypogynous disk present; leaf-blades simple. i. Vitis. 



Hypogynous disk wanting or obsolete ; leaf-blades digitately s-7-foliolate. 



2. Parthenocissus. 



I. VITIS L. Grapes. 



1. Vitis vulpina L. (Vitis riparia Michx.) Along streams from N. B. 

 and N. D. to W. Va., Tex. and Colo. — Alt. 4000-9000 ft. — Walsenburg; Dixon 

 Caiion, Larimer Co. ; Ft. Collins ; banks of Cache la Poudre ; Rist Canon ; 

 gulch west of Pennock's ; Boulder. 



2. PARTHENOCISSUS Planch. Virginia Creeper, American Ivy. 



Aerial rootlets present ; tendrils with disks. 1. P. quinquefolia. 



Aerial rootlets lacking; tendrils without disks. ;:. P. laciniata. 



1. Parthenocissus quinquefolia (L.) Planch. In woods and on banks from 

 Que. and Man. to Fla. and Tex. — Reported from Colorado (Meehan), but 

 doubtful. 



2. Parthenocissus vitacea Hitchc. (P. quinquefolia laciniata Planch.; P. 

 lacinata Small) On river banks and in woods from Mich, and Wyo. to Ohio 

 and Ariz.— Alt. 4000-6000 ft.— Foot-hills, Larimer Co.; Cheyenne Caiion; Ft. 

 Collins; North Cheyenne Caiion; Golden; vicinity of Arthur's Rock; near 

 Boulder. 



