50 ROSACEA. 
2. 8. Douglasii, Hooker. Darker flowers in dense panicles. Wet places. 
* * Herbaceous with a woody base: flowers white. 
3. 8. ce#spitosa, Nutt. Tufted: flowers in dense spikes on leafy scapes. 
4. 8. occidentalis, Watson. Simple glabrous stems 2-6 ft. high: panicle cymose. 
4. ARUNCUS. Linnezus, 
1. A. sylvester, Kost. Smooth, 3-5 ft. high: flowers diwcious: stamens exserted. 
5. ERIOGYNIA, Hooker. 
1. E. pectinata, Hook. Cespitose, creeping; branches erect: stamens included. 
6. HOLODISCUS, Maximowicz. 
1. H. discolor, Max. Flowers mostly dull white or light buff: carpels hairy. 
7. PHYSOCARPUS, Maximowicz. 
1. P. opulifolia, Max. Bark shreddy: leaves 3-lobed: corymbs 2 inches broad 
8. CHAMZEBATIARIA, Maximowicz. 
1, C, Millefolium, Max. Leaves narrowly lanceolate, 1-2 inches long. 
9. CHAMZEBATIA, Bentham. 
1. C. foliolosa, Benth. Strony scented, viscid: leaves ovate to oblong. 
10. RUBUS, Linneus. 
Stems woody: leaves simple, palmately lobed: no prickles............. ....+-2+--+- 1 
Stems woody: leaves mostly 3-foliolate: more or less prickly.................. 2.3, 4 
Stems herbaceous, trailing, not prickly: carpels few...........-0-0 60 sce e ee ence ee 6, 6 
1, R. Nutkanus, Mocino. Large leaves: large rose-like flowers. 
2, KR. leucodermis, Dougl. Leaves white below, veins pricky. (Kaspberry.) 
3. R. spectabilis, Pursh. Flowers large, red-purple: fruit yellow or crimson. 
4. R. ursinus, C.&8. Stems weak, often long-trailing: very prickly. (Blackberry.) 
5. R_ pedatus, Smith, Leaves 3-foliolate or nearly 5-foliolate: fruit red. 
6. BR. lasiococcus, Gr. Stouter: leaves mostly 3-5-lobed: fruit tomentose. 
11. CERCOCARPUS, HBK. 
C. parvifolius, Nutt. Evergreen: leaves veiny, serrate above: wood hard. 
% ©. ledifolius, Nutt. Leaves narrow, entire margins revolute. (Mt. Mahogony.) 
