ROSACER. 53 
20. AGRIMONIA, Tournefort. 
1. A. Eupitoria, L. Asiry: 2-4 ft. high: racemes spicate: akene subglobose. 
A. 
1, 
oe eee 
PRP wp 
21. ACZENA, Linnzus. 
A. trifida, R&P. Leaves crowded at base: green flowers in terminal spike. 
22. POTERIUM, Linnzus, 
officinale, B. & H. Flowers deep purple or red in a ahort spike, 
annuum, Nutt. Smaller: leaflets pinnatifid: flowers greenish. 
od 
23. ROSA, Tournefort. 
Nutkana, Presl. Spines stout: stipules broad; flowers 2 or 3 inches broad. 
pisocarpa, Gr. Globose fruit smaller, with a neck. 
Californica, C. &S. Often tall: fruit ovoid, with a neck. 
spithamea, Watson. A span high or less: globose fruit glandular-prickly. 
gymnocarpa, Nutt. Slender: calyx-lobes deciduous, leaving fruit naked. 
24, HETEROMELES, J. Roemer. 
arbutifolia, Rem. Panicles terminal: fruit ripe in December. (Toyon.) 
hi 
25. PIRUS, Linnens. 
rivularis, Dougl. Leaves simple, woolly: fruit ovoid. 
sambucifolia, C. &S. Leaves pinnate: fruit globose, red. 
Ts) 
26. CRATZEGUS, Linneus. 
C. rivularis, Nutt. Leaves ovate, serrate, rarely lobed. (Hawthorn.) 
C. Douglasii, Lindl. A large tree: leaves often incised: fruit 6 lines thick. 
27. AMELANCHIER, Medicus. 
A. alnifolia, Nutt. Flowers in short racemes: petals not ovate. (Shad-berry.} 
CALYCANTHACES. 
l. CALYCANTHUS, Linnaeus. 
O. oceidentalis, H.& A. Inner sepals and outer petals lurid purple or red, am 
inch or more long, slender, leathery: inuer petals shorter. incurved. 
