ROSACEAE. 191 



8. Rosa pandorana Greene. In the mountains of Colo. Pandora. 



9. Rosa Macounii Greene. In valleys and along streams from S. D. and 

 Alb. to Kans. and Colo. Colorado Springs ; Pike's Peak ; Mancos ; New- 

 Windsor ; North Cheyenne Canon ; Horsetooth Mountain. 



10. Rosa Bakeri Rydb. In canons and on hillsides from Mont, and Ida. 

 to Colo. Alt. 7500-9000 ft. Box Canon, west of Ouray; Dix Post Office; 

 Four-Mile Hill, Routt Co.; Parlin. 



11. Rosa Fendleri Crepin. In valleys and along streams from S. D. and 

 Mont, to N. M. and Ariz. Alt. 5000-9000 ft. Blue River, above Kremmling; 

 Golden ; Twin Lakes ; mountains between Sunshine and Ward ; Boulder. 



12. Rosa aciculata (Cockerell) Rydb. (R. blanda aciculata Cockerell) In 

 rich valleys of Colo and N. M. Alt. 6000-10,000 ft. Walsenburg; moun- 

 tains between Sunshine and Ward. 



13. Rosa Maximiliani Nees. ( ? Rosa Woodsii Lindl.) In valleys and on 

 foot-hills from Sask. and Wash, to Colo, and Utah. Alt. 6000-9000 ft. 

 Gunnison ; Blue River, above Kremmling; foot-hills, Larimer Co.; Sangre 

 de Cristo Creek; Pagosa Springs; southeast of Ouray; New Windsor; Horse- 

 tooth Mountain ; Steamboat Springs. 



Family 67. MALACEAE Small. APPLE FAMILY. 



Cavities of the ovary becoming twice as many as the styles by a false, complete or 



incomplete partition ; leaves simple, toothed. 



Styles 5 ; flowers racemose. i. AMELANCHIER. 



Styles 2 ; flowers solitary or in sessile 2-3-flowered corymbs. 2. PERAPHYLLUM. 



Cavities of the ovary as many as the styles ; flowers in corymbiform, compound 



cymes. 

 Leaves simple, but more or less lobed ; ovules solitary in each carpel. 



3. CRATAEGUS. 

 Leaves pinnate : ovules 2 in each carpel. 4. SORBUS. 



i. AMELANCHIER L. JUNE-BERRY. 



Leaf-blades obtuse to truncate at the apex. 



Leaf-blades orbicular or nearly so, truncate at the apex. 

 Mature leaves glabrous or sparingly and loosely villous. 



Whole plant perfectly glabrous; bud-scales glabrous. i. A. polycarpa. 



Inflorescence and lower surface of the leaves white-villous when young ; 



bud-scales hairy. 

 Petals 12-15 mm. long; mature leaves perfectly glabrous. 



Leaf-blades elliptic. 2. A. elliptica. 



Leaf-blades suborbicular or broadly oval. 3. A. alnifolia. 



Petals about 8 mm. long ; mature leaves often somewhat villous beneath. 



4. A. oreophila. 

 Mature leaves finely pubescent on both sides, or rarely glabrate above. 



5. A. Bakeri. 

 Leaf-blades oval or obovate, obtuse or rounded at the apex, more or less glaucous 



beneath, entire or slightly toothed. 6. A. pruni folia. 



Leaves more or less ovate, acute. 7. A. rubescens. 



i. Amelanchier polycarpa Greene. Hills of Colo, and Wyo. Alt. 7000- 

 11,000 ft. Piedra; Mt. Abram, Ouray; Hounold; Twin Lakes; Bob Creek, 

 west of La Plata Mountains; Cerro Summit; Ojo. 



