<')0 ROSACEA 



2. S. Douglasii, Hooker. Darker flowers in dense panicles. Wet places. 



* * Herbaceous with a woody base: flowers white. 



3. S. csespitosa, Nutt. Tufted: flowers in dense spikes on leafy scapes. 



4. S. occidentalis, Watson. Simple glabrous stems 2-6 ft. high: panicle cymose. 



4. ABUNCUS. Linnfflus. 

 1. A. Sylvester, Kost. Smooth, 3-5 ft. high: flowers dioecious: stamens exserted. 



5. ERIOGYNIA, Hooker. 

 1. E. pectiuata, Hook. Cespitose, creeping; branches erect: stamens included. 



6. HOIiODISCUS, Maxiraowicz. 

 1. H. discolor, Max. Flowers mostly dull white or light buff: carpels hairy. 



7. PHYSOCABPXJS, Maximowicz. 

 1. P. opulifolia. Max. Bark shreddy: leaves 3-lobed: corymbs 2 inches broad. 



8. CHAM.ffiBATIARIA, Maximowicz. 

 1 , C. Millefolium, Max. Leaves narrowly lanceolate, 1 -.? inches long. 



9. CHAM.ffiBATIA, Bentham. 

 1. C. foliolosa, Benth. Strong scented, viscid: leaves ovate to oblong. 



10. RTJBXJS. Linnffius. 



Stems woody: leaves simple, palmately lobed: no prickles I 



Stems woody: leaves mostly 3-foliolate: more or less prickly 2, 3, 4 



Stems herbaceous, trailing, not prickly : carpels few 6, 6 



1. R, Nutkanus, Mocino. Large leaves: large rose-like flowers. 



2. El. leucodermis, Dougl. Leaves white below, veins pricky. (Raspberry.) 



3. R. spectabilis, Pursh. Flowers large, red-purple: fruit yellow or crimson. 



4. R. ursinus, C. & S. Stems weak, often long-trailing: very x^rickly. (Blackberry.) 



5. R. pedatus, Smith. Leaves 3-foliolate or nearly 5-foliolate: fruit red. 



6. R. lasiococcus, Gr. Stouter: leaves mostly 3-5-lobed: fruit tomentose. 



11. CERCOCARPTJS, HBK. 



i. C. parvifolius, Nutt. Evergreen: leaves veiny, serrate above: wood hard. 



\ C. ledifolius, Nutt. Leaves narrow, entire margins revolute. (Mt. Mahogony.) 



