SECTION IV. 
SPECIES OF PLANTS. 
ABI'ES. See Pi'nus. 
A-BU'TILON. See Si'da. 
(V.CA'CIA. 15—10. (Leguminosce.) [From 
the Greek aka'zo, to sharpen.] 
glandulo'sa, (w. Ju. Z|.) leaves bipinnate, 
feafets 12-paired, glands between each 
pair; spikes globose, solitary, peduncled, 
axillary ; legume falcate ; unarmed. S. 
farnesia'na, (black thorn, y. ^.) leaves 
bipinnate, leafets 8-paired ; spikes globose, 
sessile. Flowers fragrant; legumes fusi- 
form. S. 
ACAL"YPHA. 19—15. (Euphorbice.) [From 
the Greek a, not, kalos, agreeable, aphe, to 
the touch.] 
virgin"ica, (three-seeded mercury, g. Au. 
0.) pubescent; leaves on short petioles, 
lanceolate-oblong, remotely and obtusely 
seiTate ; involucre cordate, ovate, acumi- 
nate, toothed ; fertile flowers at the base of 
the sterile spike. Road-sides. 12 to 18 i. 
Var. car'olinia'na, with longer petioles and 
broader leaves. 
A'CER. 8—1. {Acera.) [Latin acer, acrid, 
referring to the juice of some of the species.] 
do'sycar'pum, (white maple, silver maple, 
g-y. Ip). leaves palmate, 5-lobed, truncate at 
the base, unequally gash-toothed, glabrous 
/ and glaucous beneath, obtusely sinuate ; 
flowers glomerate ; pedicels short ; germs 
downy. 50 f. Fruit a samara. 
barba'tum, (hairy maple w-g. Ap. '^.) 
leaves hearl-ovate, short, 3-lobed, unequully 
serrate, glaucous beneath, and hairy at the 
nerves ; peduncles hairy, staminate ones 
branching, pistillate ones simple ; calyx 
bearded within ; wings of the cap.sules 
erect ; small. 15 f. 
ni'gmm, (sweet tree, black maple, y. 
Ap. 9.) leaves palmate, 5-lobed, cordate, 
with the sinus at the base closed, lobes 
spreading, sinuate-toothed, downy beneath ; 
flowers coryuibed; capsules turgid, sub- 
globose ; wings diverging. Large tree, 
affording almost as much sugar as the sugar 
maple. 50 f. 
spica'tum, (mountain maple bush, y-g. M. 
F).) leaves sub-5-lobed, acute, toothed, pu- 
bescent beneath; racemes compound, erect. 
'5 f. Monntaias. 
fu'brum, (red maple, soft maple, r. Ap. 
f?.) leaves palmate, 5 lobed, cordate at the 
base, unequally ga.sh-toothed, glaucous be- 
neath, sinuses acute ; flowers in about fives, 
in sessile umbels, with long pedicels ; t;erms 
glabrous; stamens variable. Precociou.s. 
50 f. 
sacchan' num., (sugar maple, rock maple, 
hard maple, r. y. M. 1? .) leaves palmate, 
5-lobed, at the base sub cordate, acuminate, 
sinuate-toothed, glaucous beneath ; pedun- 
27* 
I cles in a nodding corymb. Large trr*. 
50 f. Fruii ovoid, smooth, the wings about 
an inch long. 
stria'tum, (striped maple, false dogwood, 
j moosewood, g. M. .) lower leaves round- 
ish, upper ones 3-cuspidate-acuminate, 
sharply serrate, glabrous ; racemes simple, 
pendant. Small tree, with a greenish, 
striped bark. 15 f. 
ACER"ATES.* 18—5. {Asclepiadce.) [From 
the Greek a, without, keras, horn.] 
virid"iJlo'ra, (green milkweed, g. Ju. TX) 
stem erect, simple, hairy ; leaves oblong, 
on short petioles, tomentose, obtuse ; um- 
bels lateral, solitary, sub-se.ssile, nodding, 
dense flowered ; umbels about 3 ; horns 
of the nectary wanting. Sandy fields. 
Stem 2 f. 
ACHTLLE'A. 17—2. (Corymhifera.) [From 
the Greek warrior Arhilles.] 
millefo'liiim, (yarrow, milfoil, w. J. 2^.) 
leaves 2-pinnatifid, downy, the divisions 
linear, toothed, mucronate; calyx and stem 
furrowed ; flowers in large, dense, terminal 
corymbs ; rays about 5 ; disk-florets few ; 
receptacle flat, chatFy, the chalF lance- 
oblong. Nuturalized. 15 i. S. 
ACHYRAN"THES. 15—5. (Amaranthi.) 
[From the Greek achu'ron, chaff, and anthos, 
flower.] 
refpens, (forty knot, March. IX) stem pro- 
cumbent, pubescent; leaves opposite, pe- 
tioled, lanceolate. Flowers in heads. 
ACNI'DA. 20—5. (Chenopodece.) [From the 
Greek «, wanting, knide, a sting.] 
cannahi'na, (water hemp, w. g. Ju. 
leaves ovate-lanceolate ; capsules smooth, 
acutely angled. Marshes. Can. to Flor. 
Flowers small, green, in large panicles. 
ACONl'TUM. 12-5. (Ranunculaceoi .) [From 
the Greek akone^ rugged, in allusion to its 
habit.] 
uncina'tum, (monk's hood, b. J. 2X-) stem 
flexuose ; leaves palmate, 3 to 5-parted, 
divisions rhomb-lanceolate, gash-toothed ; 
upper lip of the corolla lengthened, convex, 
beaked ; stem twining, branching. Gro^os 
on mountains and rongh places. Culti- 
vated. 2 f. 
napcV'lus, (wolfs bane, b. J. 11.) leaves 
shining, 5-parted, the divisions 3-parted, 
subdivisions linear ; upper lip of the corolla 
lanceolate, ascending, 2-cleft, spur straight, 
obtuse. 2 f. Ex. 
ACO'RUS. 6—1. {AroidcaE) [From a, with- 
out, and kore, the pupil, because it was es- 
teemed good for disorders of the eyes ] 
cal"amus, (sweet flag, g-y. J. 2^.) spike 
* This genus is scarcely distinct from As- 
clepias. 
