SAPINDACEJE. (SOAPBERRY FAMILY.) 119 



* Flowers in terminal racemes, greenish, appearing after the leaves: stamens 6-8. 



1. A. Pennsylv&nicum, L. (Striped Maple.) Leaves 3-lobed at V^t^^^ 

 the apex, finely and sharply doubly serrate; the short lobes taper-pointed and 



also serrate ; racemes drooping, loose ; petals olm-ate ; fruit with large diverging 

 wings. (A. striatum, Lain.) — Rich woods, Maine to Wisconsin, and north- 

 ward along the Alleghanies to Virginia and Kentucky. June. — A small and 

 slender tree, with light-green bark striped with dark lines, and greenish flowers 

 and fruit. Also called Striped Dogwood and Moose- Wood. 



2. A. spicktum, Lam. (Mountain M.) Leaves downy underneath, .A . f 

 3- (or slightly 5-) lobed, coarsely serrate, the lobes taper-pointed; racemes up- 



ru/ht, dense, somewhat compound; petals linear-spatulate ; fruit with small very 

 divergent wings. (A. montanum, Ait.) — Moist woods, with the same range 

 as No. 1. June. — A tall shrub, forming clumps. 



* * Flowers umbettate-corymbed, greenish-yellow, appearing with the leaves. 



3. A. sacchkrinum, Wang. (Sugar or Rock M.) Leaves 3 - 5-lobed, 

 with rounded sinuses and pointed sparingly sinuate-toothed lobes, either heart- 

 shaped or nearly truncate at the base, whitish and smooth or a little downy on 

 the veins beneath ; flowers from terminal leaf-bearing and lateral leafless buds, 

 drooping on very slender hairy pedicels ; calyx hairy at the apex ; petals none ; 

 wings of the fruit broad, slightly diverging. — Rich woods, especially north- 

 ward and along the mountains southward. April, May. — A large and hand- 

 some tree. 



Var. nigrum. (Black Sugar-M.) Leaves scarcely paler beneath, but 

 often minutely downy, the lobes wider, the sinus at the base often closed. (A. 

 nigrum, Michx.) — With the ordinary form. 



* * * Flowers in umbel-like clusters arising from separate lateral buds, and much 

 preceding the leaves ; stamens 3-6. 



4. A. dasycarpum, Ehrhart. (White or Silver M.) Leaves very 

 deeply 5-lobed with the sinuses rather acute, silvery-white (and when young 

 downy) underneath, the divisions narrow, cut-lobed and toothed ; flowers 

 (greenish-yellow) on short pedicels; petals none ; fruit woolly ivhen young, with 

 large divergent wings. — River-banks ; most common southward and westward. 

 March -April. — A fine ornamental tree. 



5. A. rtlbrum, L. (Red or Swamp M.) Leaves 3 - 5 lobed, with acute 

 sinuses, whitish underneath; the lobes irregularly serrate and notched, acute, 

 the middle one usually longest ; petals linear-oblong; flowers (scarlet, crimson, 

 or sometimes yellowish) on very short pedicels ; but the smooth fruit on pro- 

 longed drooping pedicels. — Swamps and wet woods. April. — A small tree, 

 with reddish twigs ; the leaves varying greatly in shape, turning bright crim- 

 son in early autumn. 



4. NEGUNDO, Mcench. Ash-leaved Maple. Box-Elder. 



Flowers dicecious. Calyx minute, 4 - 5-cleft. Petals none. Stamens 4-5. 

 Disk none. — Sterile flowers in clusters on capillary pedicels, the fertile in 

 drooping racemes, from lateral buds. Leaves pinnate, with 3 or 5 leaflets. 

 (Name unmeaning.) 



