ACERACEAE 825 
more or less downy bene ath, w 3—5 entire or ORR Eo sa ; basal 
ih closed by the overlapping pres ex campanulate, a . long; 
sepals rounded: samaras 3-4 cm. long, slightly spreading. m. nigrum 
Michx. f.]—-(BLACK-MAPLE.)—Woods, open slopes, and fields, various provinces, 
Ga. to La., Minn., Ont., and N. H.—Spr.—The ood is nearly similar to that of 
um. 
4, S. leucoderme (Small) Nieuwl. Shrub, or tree reaching a height of 8 m 
the bark smooth, white: leaf-blades br oader than n long, or rarely orbieular in 
outline, mostly 4-lobed, sometimes imperfectly 5-lobed, 4-9 cm. in diameter, 
cordate or truncate, with a rather open and shallow sinus, dark-green, glabrous 
and e ith light nerves above, greenish, tinge with r a D 
t r acumi- 
nerv 
n (the Fourth o r fifth when present, e a or the a one only 
lyx 2 l 
with 2 obtuse teeth: a pup yellow: calyx 2 mm. long: samaras red; 
wings elliptic-spatulate, 1-2 e ong, red, conspicuous, parallel or nearly so. 
[A. leucoderme Small ]-— (CH Buca MAPLE.)— — Ro eky river-banks, woods, and cliffs, 
inner edge of Coastal Plain and Piedmont, Ga. to , Ark. and N. O.—Spr.— 
The heart-wood is very close-grained and hard. The Bu is often erooked. 
3. ARGENTACER Small Trees. Leaf-blades mostly 3-lobed. Flowers 
in dense lateral clusters, subtended by an imbricate d very precocious, 
appearing long before the leaves, androdioecious, sessile nearly s 
various, that of the staminate flowers narrow and page that of the pistil- 
la te short and broad, the lobes dn ~ the tube. Petals wanting or 
inute. Stamens long exserted: anther 
elipsoid.. dd longer than the csi 
One spec NS 
1. A.s um (L.) Small Tree rarely lf M E 
36 m. tall, p bark flaky at maturity, gray, 1 
or that of the twigs reddish-brown: leaf- 
blades about as long as broad, 10—15 em. 
d with 3-5 prominent incised lobes | 
onger than the body, silky when young, * 
a abrate, bright-green above, glaucous or ^ 
silvery-white beneath, truncate or cordate 
yellowish : 
at : 
A pied 5-6 em. long, tomentose, or glab- 
e at ma grt d at length, widely 
d ading. [Acer dasycarpum Ehrh.]—(Sir.- 
VER-MAPLE. W mno MAPLE. SOFT-MAPLE. = 
Woods, ue and alluvial soil, various provinces, N Fla. to La., Okl 
N. B.—Wint.- —Spr.— —The pale-brown heart-wood is Excmi 
and PT [uy brittle. 
4. RUFACER Small Trees. Leaf-blades coarsely toothed or 3-5-lobed. 
Flowers in dense lateral clusters subtended by an imbricate involucre, appear- 
ing long before the leaves; androdioecious, short-pedicelled. Calyx of usually 
9 distinct or nearly distinct sepals. Petals somewhat smaller than the sepals. 
Stamens, in the staminate flowers, exserted: anthers oval. — longer than 
the style.—About 6 species, North Ameriean.—MAPLES. ACE l 
xb ood or glabrate beneath: samaras less than 4 cm. long: wings rather 
sprea 
Leaf- blades. prominently and sharply lobed, the lobes prominently a 
maras mostly less than 3 cm. long. 1. R.rubru 
