50 BOSACE^L 



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. ARUNCUS. Linnaeus. 

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



5. ERIOGYNIA, Hooker. 

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



6. HOLODISCTJS, Maximowicz. 

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



7. PHYSOCARPTJS, Maximowicz. 

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



8. CHAM2EBATIARIA, Maximowicz. 

 1. O. Millefoliuxn, Max. Leaves narrowly lanceolate, 1-3 inches long. 



9. CHAM-3SBATIA, Bentham. 

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



1O. RTJBTJS, Linnaeus. 



Stems woody: leaves simple, palmately lobed: no prickles 1 



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



Stems herbaceous, trailing, not prickly : carpels few 5, 6 



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



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



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



4. ft. ursinus, C. & S. Stems weak, often long-trailing: very prickly. (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. CERCOCARPUS, HBK. 



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



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



