CELASTRACEAE. 37 
CELASTRACER. 
A slender deciduous shrub with 4-angled branches: leaves 2-4 inches long........---- 1 
A low much-branched evergreen: leaves 6-18 lines long, numerous.......+--+e0--e0ee 2 
1. EVONYMUS, Tournefort. 
1. E. occidentalis, Tourn. Flowers dark brown, parts in 5’s, rotate, drooping. 
2. PACHYSTIMA, Rafinesque. 
1. P, Mersinites, Raf. Flowers greenish, parts in 4’s, about a line broad. 
RHAMNACER. 
Flowers greenish. Leaves alternate: flexuose branches spiny.........-..-. .--+ sees 1 
Leaves alternate: not spiny: fruit juicy..........-.....0---4e eee 2 
Leaves opposite, 1 or 2 lines long: fruit dry.......... 1... ...4ee- 3 
Flowers white or blue, in dense clusters: fruit dry......... 0... cc eee eee cece eee 4 
1. ZIZYPHUS, Jussieu. 
1, Z Parryi, Torr, Peduncles axillary, recurved in fruit, 1-3-flowered. 
2. RHAMNUS, Linnezus. 
Flowers apetalous and mostly dicecious: seeds concave. .........-2+e2+eeeee sesaee epee 
Flowers with minute petals, mostly perfect: seeds convex on the back............. 38, 4 
1. RB. alnifolia, L’Her. Low: deciduous leaves acute at each end, serrate. 
2. R. crocea, Nutt. Leaves acutely denticulate, evergreen, thin. 
3. R, Californica, Esch. Leaves elliptical to ovate-oblong, evergreen, thick. 
Var. tomentella, Gr. Densely white-tomentose. Both forms common in Cal, 
4 BR. Purshiana, DC. Elliptical leaves 2 to 7 inches long, deciduous, 
3. ADOLPHIA, Meisner. 
L A. Californica, Watson. In dense clumps 2 or 3 ft. high, branchlets spiny. 
4, CEANOTHUS, Linnzus. 
§ 1. Leaves all alternate: fruit’not crested. 
Leaves 3-nerved from the base. 
Branches not rigid or spiny: leaves glandular serrate (except No. 1) 
Flowers white in large clusters.....0 ©2200. cesses cece cence Perey bap” i: | 
Flowers blue...........- Stineeserenees siciwtaralaratets wratepee Se isrelsravensteatere . 4,5, 6 
