38 CELASTRACEiE. 



Branches rigid, spreading, often spinose: racemes simple. 



Leaves glandular-serrate: flowers blue 7, 8 



Leaves usually entire: branches grayish 9, 10, 11 



Leaves pinnately veined, obtuse: flowers blue (see No. 5) 12, 13, 14, 15 



§ 2. Leaves small, often opposite, very thick with numerous straight side veins, 

 %pinosely 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. 0. tliyrsiflorus, Esch. Branches angled: leaves shining above, ashy beneath. 



5. C. dentatu^, T, & G. Leaves mostly 3-4 lines long, thin: thyrse globose. 



6. C. decTimbens, Watson. Trailing, hirsute: leaves thin, teeth green -glandular. 



7. C. hirsutus, Nutt. Silky, rarely spiny: leaves rounded or cordate at base, acute. 



8. C. Forediatus, H. k A. Leaves smooth above: racemes pubescent, peduncles short. 



9. C. divaricatus, Nutt. Branches sometimes green: racemes 1-4 inches long. 



10. C. incanus, T. & G. Leaves hoary beneath: racemes short: fruit warty. 



11. C. cordulatus, Kell. Pubescent, low, flat-topped: racemes an inch long or less. 



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. C. 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. C. 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. 



19. C. rigidus, Nutt. Branchlets tomentose: leaves 2 to 5 lines long: flowers blue. 



20. C. prostratus, Benth. Prostrate: leaves spinose at apex only: flowers blue. 



TITACEiE. 



VITIS, Tournefort. 

 I. V. Calif omica, Benth. Leaves round-cordate, serrate. (Wild Grape.) 



SAPINDACE^. 



Flowers in large terminal erect thyrses: calyx tubular: clawed petals unequaL . . . . «••• 1 

 Flowerg small, the fertile ones in drooping clusters: ovary 2-lobed: fruit 2- winged. 



Leaves palmately lobed. ••.•••■ 



