140 POPULAR FLORA. 



III. JIAPLE Subfamily. Flowers generally polygamous or dioecious, regular. Petals often 

 none, but the calyx sometimes petal-like. Stamens 4 to 12. Styles 2, united below. Fruit a pair of 

 keys united at the bottom (Fig. 208). Leaves ojjposite. 



Flowers direcious, small and greenish: petals none: stamens 4 or 5. Leaves pinnate, 



with 3 to 5 veiny leatk'ts: twigs green, {.yerjiindo) Negundo. 



Flowers polygamous or perfect. Leaves simple, palmately lobed, [Acei-) Maple. 



Buckeye. jEscuIus, § Pavia. 



All wild species at the West and South: also cultivated for ornament: flowering in late spring or 

 summer. 



1. Fetid or Ohio Buckeye. Petals small, erect, pale yellow, shorter than the curved stamens; 



young fruit prickly like Horsechestnut; a tree. Eiver-banks, W. yE. glabra. 



2. Sweet Buckeye. Petals yellow or reddish, erect, enclosing the stamens ; fruit smooth. yE.flava. 



3. Ped Buckeye. Petals red, also the tubular calyx : otherwise like the last. Shrub. uE. Pavia. 



4. Ssi ALL-FLOWERED B. Leaflets stalked; petals white, rather spreading; stamens verv long; fruit 



smooth; seed eatable, not bitter, as are the others; flowers in a long raceme-like panicle. Shrub. 

 S. & cult. A. 2>'i>'>^iflora. 



Maple. Acer. 



* Flowers in teiTninal racemes, with petals, greenish, in late spring: stamens 6 to 8. 



1. Striped JIaple. Bark green, with darker stripes; leaves large, with 3 short and taper-pointed 



lobes; racemes hanging. Small tree in cool woods; common, N. A. Pennsylvunicum. 



2. lilouKTAiN SL Bark gray; leaves 3-lobed; racemes erect; flowers small. Shrub, N. A. spicatum. 



3. Sycamore M. An imported shade-tree, with large strongly 5-lobed leaves, and large hanging 



racemes, flowering soon after the leaves appear. A. Pseudo-Pldtanus. 



* * Flowers in loose clusters, yellowish-green, appearing with the leaves, in spring. 



4. Norway JL An imported shade-tree, with leaves resembling Sugar jMaple, but brighter green on 



both sides, rounder, and with some long pointed teeth; flowers in an erect terminal corymb, with 

 petals; wings of the fruit verj' large, diverging. A. platanoides. 



5. Sugar or Rock M. Leaves with 3 or mostly 5 long-pointed lobes, their edges entire except a 



few coarse Avavy teeth; flowers hanging on very slender hairy stalks, without petals; fruit with 

 rather small wings, ripe in autumn. Tall tree ; iu rich woods, and commonly planted for shade. 



A. sacihdrlmim. 

 * * * Flowers in early spring, considerablj' earlier than the leaves, on short pedicels, in small 

 umbel-like clusters from lateral leafless buds : stamens generally 5 : fruit ripe and falling in early 

 summer. 



6. White or Silver M. Leaves very deeply 5-lobed, cut and toothed, white beneath; flowers 



greenish-yellow, short-stalked, without petals ; fruit woolly when young, with very large and 

 smooth diverging wings. Tree common on river-banks, and planted for shade. A. dn.iycdrjmm. 



7. Red or Soft M. Leaves whitish beneath, with 3 or 5 short lobes, toothed; flowers on very 



short stalks which lengthen in fruit, with linear-oblong petals, red or sometimes yellowish ; 

 wings of the fruit small, reddish. Wet places: a common tree. A. ruhrum 



