ROSACEAE (ROSE FAMILY) 



245 



3. FENDLERA Eng. & Gray 



Erect intricately-branched shrub, with small opposite exstipulate leaves 

 and large flowers terminal on the branchlets. Calyx-tube 8-ribbed. Petals 

 ovate-deltoid, unguiculate, emarginate. Stamens 8; filaments 2-forked at the 

 apex, the lobes divaricate and extended beyond the cuspidate anther. Cap- 

 sule crustaceous. Seeds reticulate-winged below. 



1. Fendlera rupicola Eng. & Gray, Smithson. Contrib. 3: 77. pi. 5. 1852. 

 Pubescent or glabrate, branches terete, striate: leaves deciduous, subsessile, 

 oblong, entire, 3-nerved at the base: flowers solitary or in 3-flowered cymes, 

 white, short-peduncled. Southwestern Colorado and southward. 



54. ROSACEAE Juss. ROSE FAMILY 



Herbs or shrubs with alternate stipulate leaves (the stipules often early 

 deciduous) and perfect regular flowers. Calyx free from or adnate to the 

 carpels, usually 5-lobed and often with 5 alternating bractlets. Petals of the 

 same number, or wanting, distinct. Stamens perigynous or rarely hypogy- 

 nous, usually many, sometimes as few as 5. Carpels 1-many, distinct, or 

 adnate to the calyx; ovary 1-celled, with either terminal or lateral style. 

 Fruit an achene or a few-seeded follicle. 



Fruit not inclosed in a hollow receptacle, i. e., the calyx not con- 

 stricting over the fruit. 



Shrubs; pistils few (usually 1 or 2, rarely 5-8). 

 Carpels becoming dry achenes. 



Flowers solitary, or in fascicles of 2-3. 

 Style becoming elongated and plumose. 



Leaves not glandular-dotted; petals wanting 



Leaves glandular-dotted; petals yellow .... 



Style not elongating. 



Leaves fascicled; petals yellow . . . . 



Leaves opposite; petals wanting ..... 



Flowers panieled ...... ... 



Carpels becoming few-seeded follicles. 

 Leaves simple. 



Erect and branching shrubs. 



Flowers in simple corymbs . . 



Flowers in dense panicles ...... 



Depressed-caespitose shrubs. 



Flowers spicate; leaves rosulate ..... 



Flowers solitary-terminal; leaves imbricated '. 

 Leaves compound. 



Pinnate; the pinnae small, numerous ... 



Biternate; the leaflets large ...... 



Shrubs or herbs; pistils numerous. 

 Woody, at least at base. 



Fruit dry tailed achenes; leaves simple. 



Flowers solitary; plant caespitose ..... 



Flowers subpanicled; plant erect ..... 



Fruit of small drupelets crowded on a spongy receptacle. 

 Leaves simple; stem unarmed ...... 



Leaves compound; stem prickly ...... 



Fruit dry achenes, not tailed; leaves compound . 

 Wholly herbaceous; pistils becoming dry achenes. 



Leaves compound or ternately cleft; style deciduous from the 



achene. 

 Trifoliolate; style lateral. 



Receptacle dry; flowers yellow ..... 



Receptacle becoming fleshy; flowers white 

 Ternately many-cleft into linear divisions .... 



Pinnately or digitately compound. 

 Receptacle dry. 

 Leaflets pinnate. 



Style basal ; leaflets opposite ..... 



Style lateral; leaflets interrupted .... 



Leaflets pinnate or digitate; style terminal or nearly so. 



Stamens inserted near throat of calyx, distant from 



the receptacle ....... 



1. Cercocarpus. 



2. Cowania. 



3. Purshia. 



4. Coleogyne. 



5. Holodiscus. 



6. Physocarpus. 



7. Spiraea. 



8. Petrophyton. 



9. Kelseya. 



10. Chamaebatiaria, 



11. Aruncus. 



12. Dryas. 



13. Fallugia. 



14. Bossekia. 



15. Rub us. 



16. Dasiophora. 



17. Sibbaldia. 



18. Fragaria. 



19. Chamaerhodos. 



20. Drymocallis. 



21. Argentina. 



22. Horkelia. 



