(BUCKEYE FAMILY.) 37 



9. C. cuneatus, Nutt. Similar to the last, but less tomentose; leaves cuneate- 

 obovate or oblong, retuse above, on slender petioles; flowers in looser clusters. 



10. C. rigidus, Nutt. Erect, 5 ft. high, the branchlets tomentose; leaves 2 to 5 

 lines long, cuneate-oblong or broadly obovate, few toothed above, very shortly petioled; 

 flowers bright blue. 



ORDER VITACE-SI has but one representative; the well-known Calif ornia wild grape, 

 Vitis Californica, Benth., which is common on the woody banks of streams. 



ORDER 19. SAPINDACE^J. 



Trees or shrubs, mostly with compound or lobed leaves, with unsymmetrical or irregular 

 flowers; the order best characterized under its suborders. 

 Under the order proper belongs 



1. -ffiSCULUS, L. BUCKEYE. 



Leaves opposite, palmately 4-7-f oliolate. Calyx tubular, unequally 5-toothed. Petals 

 4 or 5, unequal, with claws. Stamens 5 to 7, exserted and often unequal. Ovary 

 3-celled; style long. Fruit a large leathery 3-valved pod. 



1. .53. Californica, Nutt. Leaflets, usually 5, smooth, oblong-lanceolate, acute, 

 obtuse at base, slenderly petiolulate, serrulate, 3 to 5 inches long; flowers in a close 

 finely pubescent thyrse which is 6 to 12 inches long; calyx 2-lobed, the lobes scarcely 

 toothed; petals white or pale rose, half an inch long or more; stamens 5 to 7; anthers 

 orange colored. Fruit pear-shaped, 1^ to 2 inches long, containing, usually, one seed. 



SUB-ORDER. ACERINE^E. 



Flowers polygamous or dioecious, regular, often apetalous. Ovary 2-lobed and 2-celled, 

 each 1 -seeded cell producing a wing. Leaves opposite without stipules. 



2. ACER, Tourn. MAPLE. 



Leaves palmately lobed. Calyx colored. Petals, usually 5. Stamens 3 to 12 inserted 

 with the petals on a lobed disk. Styles 2. Fruit divaricately 2- winged. 



1. A. macrophyllum, Pursh. (LARGE-LEAFED MAPLE.) A tree 2 or 3 feet in 

 diameter; leaves 6 to 10 inches in diameter, deeply 3-5-cleft; flowers fragrant, yellow, 

 in crowded pendulous racemes; fruit densely hairy; the smooth wings 1| inches long. 



2. A. circinatum, Pursh. (VINE-MAPLE.) A shrub or small tree; leaves 3 to 5 

 inches broad, 7-9-lobed, lobes sharply serrate; flowers in corymbs loosely 10-20-flowered, 

 on slender 2-leaved branchlets; sepals red or purple, exceeding the greenish petals; fruit 

 smooth. 



