SAPINDACEai:. (buckeye FAMILY.) 37 



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

 obovate or oblong, retusc above, on slender jjetioles; flowers in looser clusters. 



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

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

 Uowcrs bright blue. 



Okder VITACE.aj has but one representative; the well-known California wild grape, 

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



Okder 19. SAPINDACEiE. 



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. ^SCULUS, L. Buckeye, 



Leaves opposite, palmately 4r-7-foliolate. 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. JE. Calif omica, 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 jiale 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-OKDER. ACERINE-SI. 



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, Toum. 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 G 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 6 

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

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

 amooth. ♦ 



