Negundo. ACERACE.Ii:. 249 



Seeds larjre. Embryo nearly straight, radicle very short. — Uliite Maple. 

 Silver-leaved Miiplc. Soft Maple. 



10. A. rubrum (Linn.) : leaves cordate (rarely truncate or rounded at the 

 base), whitish and at length mostly glabrous beneath, 3-5-lobod, Avith the si- 

 nuses acute; lobes acute or acuminate, doul^ly serrate or iiiciscly toothrd, 

 the terminal one longest; pedicels at length elongated; petals oblong or li- 

 near; fruit (and ovaries) glabrous, with small, at first arcuately converging, 

 at length sliglilly diverij.-nt wings.— vU/f/i jr..' Jl. 2. p. 253; ll'illd. I.e.; 

 Mir/i.r. f.sylv. \. ^ 41 ; Ell. sic 1. ;). 449; Catcsb. Car. 1. t. 62; Ilonk. I. 

 <'. ; Darlingt. I. c. A. ghucum. Marsh, arbiist. 1 A. Carohnianum, W'ult. 

 Car. p. 251 ? A. coccineum, Mich.v. f. sijlv. 1. p. 209. A. sanguineum, 

 Spach, I. c. p. 176. 



IS. ? leaves smaller, 3-lobed, mostly truncate or rounded at the base, more 

 or less tomentose beneath; flowers greenish- yellow. — A. rubrum, var. Marsh.; 

 Darlins't. I. c. 



In swamps and on the marshy borders of streams, Canada ! to Florida, 

 west to the sources of the Oregon (Douglas). /?. Ncav Jersey ! and Penn- 

 sylvania! to New Orleans! March- April— Tree sometimes 60-80 fee 

 high, occasionally 3-4 feet in diameter; the Avood close-grained; the fibres 

 often curled ; sap affording a little sugar: young branches red, clouded with 

 white. Leaves longer than broad, moderately 3-lobed, the lateral lobes usu- 

 ally with 2 small ones at the base. Flowers small, bright purple or reddish, 

 on very short pedicels, which at length become filiform and pendulous. Sta- 

 mens 5-6: anthers red. Disk lol)ed, glandular. Wings of the fruit about 

 an inch in length, at first reddish. — Red Maple. Sivamp Maple. — The var. 

 0. of which we have only met with imperfect specimens, may possibly prove 

 to be a distinct species. Judging from specimens in the herbarium of the 

 late Prof. Barton, it is apparently tly? A. barbatum of Pursh. The leaves 

 often scarcely exceed an inch and a half iu length. 



+ Doubtful species. 



11. A. barbatum (Michx.) : leaves with 3 short lobes, serrate ; peduncles 

 of the staminate flowers branching, of the pistillate simple; calyx of the sta- 

 minate flowers densely bearded within ; wings of the fruit erect. Michx. ft. 

 2. p. 252. 



Carolina, Michaux. Flowers pale green, sometimes all staminate, some- 

 times with perfect flowers intermixed. Mich.v. — This species, of which it is 

 remarkable that the younger Michaux makes no mention whatever, either in 

 his general observations or catalogue of North American Maples, has been 

 identified by no succeeding botanist except Pursh, who adds " In deep pine 

 and cedar swamps. New- Jersey to Carolina; April-May. A small tree: 

 leaves small." But Pursh's plant seems to be our /?. of A. rubrum ; at least 

 specimens of A. rubrum, without fruit or flowers, exist in herb. Barton label- 

 led, apparently by Pursh, A. barbatum. The flowers and inflorescence of 

 this plant, however, do not at aU agree with Michaux's character. We sus- 

 pect, indeed, that the description of A. barbatum, Michx. was draAvn up, at 

 least as to the flowers and fruit, from specimens of A. saccharinum ; the only 

 species, so far as we are aware, which has the sepals bearded inside. 



2. NEGUNDO. Moench ; Nutt. gen. 1. p. 253 ; DC. I. c. 



Negundium, Raf. 



Flowers dioecious. Petals none. Pedicels of the staminate flowers capil- 

 lary, fascicled, from lateral aggregated buds : fertile flowers in racemes.— 



32 



