38 CELASTRACES. 
Branches rigid, spreading, often spinose: racemes simple. 
Leaves glandular-serrate: flowers blue............. Rei theese epee On S 
Leaves usually entire: branches grayish............. Pree --.--. 9, 10, 11 
Leaves pinnately veined, obtuse: flowers blue (see No. 5)............ 12, 18, 14, 15 
§ 2. Leaves small, often opposite, very thick with numerous straight side veins, 
spinosely toothed or entire: stipules mostly large and warty: flowers in sessile or shortly 
peduncled axillary clusters: fruit with 3 projections: branches rigid........... 16 to 20 
1, C. integerrimus, H. & A. Slender branches round: leaves thin. 
2. C. velutinus, Dougl. Stout: leaves thick, resinous above. 
3. C, sanguineus, Pursh. Branches reddish: leaves thin; petioles slender. 
4. C, thyrsiflorus, Esch. Branches angled: leaves shining above, ashy beneath. 
5. C. dentatus, T. & G. Leaves mostly 3-4 lines long, thin: thyrse globose. 
§. ©, decumbens, Watson. Trailing, hirsute: leaves thin, teeth green-glandular. 
7. ©. hirsutus, Nutt. Silky, rarely spiny: leaves rounded or cordate at base, acute. 
8. C. sorediatus, H.& A, Leaves smooth above: racemes pubescent, peduncles short. 
9, ©. divaricatus, Nutt. Branches sometimes green: racemes 1-4 inches long, 
10. C. incanus, T. & G. Leaves hoary beneath: racemes short: fruit warty. 
il. ©. cordulatus, Kell. Pubescent, low, flat-topped: racemes an inch long or lesa, 
12. C. spinosus, Nutt. Often a tree: leaves entire, oblong, thick; petioles slender. 
13, C. papillosus, T, & G. Leaves narrow, dark green, shining and pimply above. 
14, ©, floribundus, Hooker. Leaves 3-4 lines long, acute, undulate, denticulate. 
15. C. Veitchianus, Hooker. Glabrous, leaves thick, obovate-cuneate. Rare. 
16. C. crassifolius, Torr. Branches hoary: leaves tomentose beneath. Cal. Coast, 
17. ©. cuneatus, Nutt. Bark ashy gray: leaves cuneate-obovate, entire. Common. 
18. C, macrocarpus, Nutt. Tree-like, 8 to 12 ft. high: fruit very large. St. Barbara, 
i9. ©, rigidus, Nutt. Branchlets tomentose: leaves 2 to 5 lines long: flowers blue. 
20. C. prostratus, Benth. Prostrate: leaves spinose at apex only: flowers blue, 
VITACEE. 
VITIS, Tournefort. 
1. V. Californica, Benth. Leaves round-cordate, serrate. (Wild Grape.) 
SAPINDACEER. 
Flowers in large terminal erect thyrses: calyx tubular: clawed petals unequal.....scce 2 
Flowers small, the fertile ones in drooping clusters: ovary 2-lobed: fruit 2- winged. 
Leaves palmately lobed............ eee eee eeeeewens sidtata siete's sietsiniciemsinines 
