I 

 46 DIALYPETALOUS EXOGENS 



tree than the common variety, and is cultivated for that purpose, in 

 our villages, though rarely met with in a wild state, here. It is 

 said to be more common than the other, at the South. 



f f Flowers in short erect dusters, from lateral leafless buds, preceding the leaves. 

 * Petals none. 



4. A. dasycarpum, Ehrh. Leaves palmately and deeply 5- 

 lobed, with the sinuses acute; ovaries densely tomentose; fruit 

 very large, one samara often abortive. 



A. eriocarpum. MX. Fl. Cestr. ed. 2. p. 245. 

 WOOLLY-FRUITED ACER. Silver-leaved Maple. White Maple. 



Stem 30 to 50 or 60 feet high, much and widely branching ; the young branches 

 virgate and rather drooping. Leaves 3 to 6 inches long, very glaucous or bluish- 

 white beneath; petioles 2 to 6 inches long. Flowers pale green, in fascicles mostly 

 of fives or sevens, on short pedicels ; calyx a crenately truncate cup. Samara, 

 when mature, 2 to near 3 inches long, somewhat resembling the wing of a huge 

 grasshopper. 

 Hob. Banks of rivers; Schuylkill: rare. Fl. April. Fr. May. 



Obs. This has been extensively cultivated as a shade tree, of late, 

 and it has the merit of easy culture, and rapid growth ; but it is 

 decidedly inferior (me judice] to both the Norway, and the Sugar 

 Maple. 



** Petals 5. 



5, A. rub rum, L. Leaves mostly 3-lobed, subcordate at base, 

 lobes acute, unequally incised-dentate ; ovaries smooth. 



RED ACER. Red Maple. Swamp Maple. 



Stem 30 to 60 or 80 feet high, branched, the young branches purplish. Leaves 2 

 to 4 inches long, glaucous beneath ; petioles 1 or 2 to 5 inches long. Flowers bright 

 purple or often yellowish-tawny on longish pedicels. 

 Hob. Moist, low grounds : common. Fl. March. Fr. Sept. 



Obs. The variety with tawny flowers (first noticed, I believe, by 

 HUMPHRY MARSHALL), is quite frequent in Chester County, ami 

 those flowers are generally sterile (staminate) ; while the purple 

 flowers, so far as I have observed, are constantly perfect and fertile. 

 The wood of this species especially that sort known as Curled 

 Maple is much esteemed in the manufacture of household furniture. 



TT. NTEGIIN'DO, Moenck. 



[A name of obscure derivation and doubtful meaning.] 



Dioicous; Calyx minute, 4- or 5-cleft. Petals none. STAM. FL. 

 mostly pentandrous, on capillary fascicled pedicels. PISTILL. FL. m 

 simple slender pendulous racemes. Fruit as in Acer. 



1 HT. aceroides, Moench. Leaves ternate or quinate-pinnate ; 

 leaflets rhombic-ovate, coarsely incised-dentate. 

 Acer Negundo. L. $ FL Cestr. ed. 2. p. 246. 

 ACER-LIKE NEGUNDO. Box-Elder. Ash-leaved Maple. 



Stem 20 to 30 or 40 feet high, branched ; young branches with a yellowish-green 

 bark. Leaflets mostly 3, sometimes odd-pinnate in fives, 3 to 5 inches long ; com- 

 mon petioles 3 or 4 inches in length. Flowers yellowish-green, from lateral buds ; 

 ovaries hirsute ; fruit diverging. 

 Hob. Low grounds; along Brandy wine : not common. Fl. April. Fr. Sept. 



