140 POPULAR FLORA. 



III. MAPLE Subfamily. Flowers generally polygamous or direcious, 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 opposite. 

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



with 3 to 5 veiny leaflets: twigs green, {Negundo) Negunpo 



Flowers polygamous or perfect. Leaves simple, palmately lobed, {Acer) I\1aple. 



Buckeye. JEscuhis, § 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. JE. glabra. 



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



3. Pei) Buckeye. Petals red, also the tubular cal5'x: otherwise like the last. Shrub. ^. Pavia. 



4. Small-floweked B. Leaflets stalked; petals white, rather spreading; stamens very long; fruit 



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

 S. & cult. A parvijibra. 



Maple. Acer. 



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



1. Stkiped 5L\ple. Bark green, with darker stripes; leaves large, with 3 short and taper-pointed 



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



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

 8. SYCA:MonE 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 M. An imported shade-tree, with leaves resembling Sugar Maple, 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 very large, diverging. A. j)l(it((noides. 



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



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

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



A. sacchdrinum. 

 * * * Flowers in early spring, considerably 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-j'ellow, short-stalked, w^ithout petals ; fruit woolly when young, with very large and 

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



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 pet-als, red or sometimes yellowish : 

 wings of the fruit small, reddish. Wet places : a common tree. A. rvbi'um 



