l.*2S FRANGULACEAE. 



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



2. C. piibcscens. 

 Umbels mostly axillary ; leaves silky beneath. 



Leaf-blades distinctly glandular-serrate : plant not spiny. .?. C. subsericeus. 

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



4. C. Fendlcri. 



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

 and Calif. — Ait. 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 Canon ; mountains between 

 Sunshine and Ward; Pinkham Creek; Beaver Creek. 



2. Ceanothus pubescens (T. & G.) Rydb. (C ovatus pubcsccns 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 !\Iountain ; Monument ; Boulder. 



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

 Larimer Co. 



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

 VVyo. 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 Cafion ; 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-foIiolate. 



2. Parthenocissus. 



I. VITIS L. Gk.apes. 



I. 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 

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

 gulch west of Pennock's ; Boulder. 



2. PARTHENOCISSUS Planch. Virgixia Creeper. American Ivv. 



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



Aerial rootlets lacking; tendrils without disks. 2. P. laciniata. 



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

 Que. and Man. to Fla. and Tex. — Reported from Colorado ( Median) , 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 Canon; Ft. 

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

 Boulder. 



