SAPINDACE^E. (SOAPBERRY FAMILY.) 119 



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



1. A. Pennsylvanicum, L. (Striped Maple.) Leaves 3-lobed at 

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

 also serrate; racemes drooping, loose; petals obovate ; fruit Avith large diverging 

 wings. (A. striatum, Lam.) — Rich woods, Maine to Wisconsin, and south- 

 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. spicatum, Lam. (Mountain M.) Leaves downy underneath, 

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

 right, dense, somewhat compound ; petals linear-spatulate ; fruit with small very 

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

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



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



3. A. saccharinum, 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.) Leaces 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 when young, with 

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

 March -April. — A fine ornamental tree 



5. A. rubrum, 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. NEG-UNDO, Moench. Ash-leaved Maple. Box-Elder. 



Flowers dioecious. 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.) 



