74 ORDER 37. SAPINDACE.E. 



6 Petals 5, regular. Ovules solitary. Frnit baccate. Trees .................. SAPINDTTI. t 



b Petals 5 or 4, regular. Ovules 2 or 3 in each cell. Trees. South Florida. . . .HYPELATK. 



b Petals 4, irregular. Trees. KLREUTERIA, No. 7 .......... Vines ........... CARDIOSFKRMDM. C 



i Petals 0. Ovules 2 in each cell. Capsules winged. Shrub. South Fla ____ 



1. ACER. MAPLE. (The ancient name, meaning sharp, vigorous.) 

 Fls. polygamous. Cal. 5 (4^9)-cleft. Cor. 5 (4-9)-petallecl or 0. Stam. 8 

 (4 12). Sty. 2. Samarae 2-winged, united at base, by abortion 1-seeded, 

 Leaves simple, palmately 5 (rarely 3-9)-lobed. (See Addenda.) 



Flowers in dense, umbellate clusters, appearing before the leaves .......... Nos. 1 2 



Flowers in pendulous corymbs, yellowish, appearing with the leaves ....... Nos. \ 4 



Flowers in terminal racemes, greenish, appearing after the leaves. . .(a) 



o Shrubs or small trees, native. Leaves 3-lobed ....................... Nos. 5, 6 



a Large trees, exotic, cultivated. Leaves 5-7-lobed .................... Nos. 7, 8 



1 A, riibrum L. Red Maple. Swamp Maple. Lvs. cordate, acutely and incisely 



toothed, the Anuses acute, glaucous beneath ; ped. elongated in fruit ; pet. linear- 

 oblong ; ovaries and fruit smooth. Swamps. 30 SOf. Flowers red. April. 

 /3. tridtn*. Lvs. 3-lobed, rounded at base ; flowers yellowish. N. J. to La. SOf. 



2 A. dasycarpum Ehrh. White Maple. Lvs. truncated at base, unequally and in 



cisely toothed, with obtuse sinuses, white and smooth beneath ; fls. greenish, with 

 downy ovaries ; petals ; fruit divergent. Woods. 50f. Mar. April. (Fig. 308.) 



3 A. saccharinum L. Sugar Maple. Eock Maple. Lvs. subcordate at base, acu- 



minate, remotely toothed, with rounded and shallow sinuses, glaucous beneath ; fls. 

 pedunculate, pendulous. Rocky hills, N. 40 70f. A noble tree. 



4 A. nigrnm MX. Black Maple. Sugar Tree. Lvs. cordate, with the sinus closed, 



lobes divaricate, sinuate-dentate, paler beneath, with the veins beneath and the peti- 

 oles pubescent ; flowers on long, slender pedicels. Vt. to Ind. 30 70f. April. 



5 A. Pennsylvanicum L. Striped Maple. Whistle-wood. Lvs. with 3 acuminate 



lobes, rounded at base, sharply denticulate, smooth ; rac. simple, pendulous. Can. to 

 Ga. and Ky. 10 15f. Bark striped, green and black. May. 



6 A. spicatum Lam. Mountain Maple-bush. Lvs. 3-5-lobed, acute, dentate, pubes 



cent beneath ; racemes erect, compound. Woody hills. 5 Sf. Flowers greenish. 



7 A. PSEUDO-PLATANUS L. Sycamore. Lvs. cordate, glabrous, glaucous beneath, lobes 



acute, unequally dentate ; raceme pendulous ; fruit smooth. Europe. 40f. 



8 A. MACROPHYLLUM Ph., with large, very deeply 5-lobed leaves, nodding racemes, and 



hispid fruit. Oregon. 30 50f. 



2. NEGUNDO, Mcench. Box ELDER. ASH MAPLE. Flowers $ 6 . 

 Corolla ; $ flowers racemed, $ fascicled. Disk O. Stam. 3 5. Fruit as 

 in the last genus. Leaves compound, pinnately 3-5-foliate. 



N. aceroides Mcench. Lfts. ovate, acuminate, remotely and unequally dentate ; 9 rac. 

 long and pendulous ; fruit oblong, with large wings dilated upward. A handsome 

 tree, 20 40f. N. Y. to Car. and Cal. I April. 



3. STAPHTLEA, L. BLADDER-NUT. (A Greek word, meaning a 

 cluster of grapes ; from the form of the fructification;) Fls. 5 . Calyx of 5, 

 colored, persistent sepals. Pet. and sta. 5. Styles 3. Caps. 2 3, membra- 

 nous and inflated, slightly cohering. Seeds not arilled. J> With opposite, 

 3-7-foliate Ivs. and caducous stipules. Fig. 444. 



S. tri folia L. Lfts. 3, ovate, acuminate, serrate ; fls. in drooping cymous panicles, 

 white ; pet. ciliate at base. Can. to Car. -Jid Tenr . 6 lOf. Caps, large. May. 



4. 2ESCULUS, L. HORSE CHESTNUT. BUCKEYE. Calyx 5-toothed ; 



