SECTION IT. 
SPECIES OF PLANTS. 
&CACIA, 15 — 10. iLeguminosoi.) [From the Greek aku^zo, to sharpen.] 
glandulo'sa, (w. Ju. %.') leaves bipinnate, leafets 12-paired, glands betweea 
each pair ; spikes globose, solitary, peduncled, axillary ; legume falcate .j 
unarmed. S. 
farnesia'na, (y, T^.) leaves bipinnate, leafets 8-paired; spikes globose, sessile. 
Flowers fragrant, legumes fusiform. S. 
ACALYPHA. 19 — 15. (EuphorbicB.) [From the Greek a, not, Aaios, agreeable, aphe, to the 
touch.] 
mrgin"ica, (three-seeded mercury, g. Au. pubescent; leaves on short pe- 
tioles, laneeolate'-.oblong, remotely and obtusely serrate; involucre cordate, 
ovate, acuminate, toothed ; fertile flowers at the base of the sterol spike. 
Road-sides. 12 to 18 i. 
ACER. 8—1. (Accra.) [Latin acer, acrid, referring to the juice of some of the species.] 
ru'brum, (red maple, soft maple, r. Ap. T7.) leaves palmate, 5-lobed, cordate 
at the base, unequally gash-toothed, glaucous beneath, dividing incisions be- 
tween the lobes acute ; flowers in fives, in sessile umbels, with long pedicels; 
germs glabrous. 50 f. 
^cchari'num, (sugar maple, rock maple, hard maple, r.y. M. T7.) leaves palm- 
ate, 5-lobed, at the base sub-cordate, acuminate, obtusely sinuate, sinuate- 
toothed, glaucous beneath ; peduncles in a nodding corymb. Large tree. 
50 f. 
stria' turn, (striped maple, fs-lse dogwood, moose wood, g. M. T-^.) lower leaves 
roundish, upper ones 3-cuspidate-acuminate, sharply serrate, glabrous; ra- 
cemes simple, pendent. Small tree, with a greenish, striped bark. 15 f. 
4CERATES.* 18—5. (AsclepiadcB.) [From the Greek a, without, keras, horn.] 
virid"iflora^ (green milkweed, g, Ju. %.) stem erect, simple, hairy ; leaves 
oblong, on short petioles ; tomentose, obtuse ; umbels lateral, solitary sub- 
sessile, nodding, dense ; horns of the nectary wanting. Sandy fields. 
Stem 2 f. Flowers green. 
ACHILLEA. 17—2. (Corymbiferoi.) [From the Greek warrior jicMZcs.] 
millefo'lium, (yarrow, milfoil, w. J. %.) leaves 2-pin natifid, downy ; the di- 
visions linear, toothed, mucronate ; calyx and stem furrowed. 15 i. S. 
ACHYRANTHES. 15—5. (Amaranthi.) [From the Greek achu'ron, ehaflf, and antkos, flower.] 
re'pens, (forty knot, March. %.) stem procumbent, pubescent; leaves opposite, 
petioled, lanceolate. Flowers in heads. 
ACNIDA. 20—5. (Chenopodece,.) [From the Greek a, wanting, /cmcfe, a sting.] 
canTiabi'num, (water hemp, w. g. Ju. leaves ovate-lanceolate ; capsules 
smooth, acutely angled. Marshes. Can. to Flor, - Flowers small, green, in 
large panicles. 
ACONITUM. 12—5. (RanunculacecB.) [From the Greek akone, rugged, in allusion to its 
habit.] 
uncina'Pum, (monk's hood, b. J. %.) stem flexuose ; leaves palmate, 3 to 5-part- 
ed; divisions rhomb-lanceolate, gash-toothed; upper lip of the corolla 
lengthened, convex, beaked. Grows on mountains and rough places. Cul- 
tivated. 2 f. 
na/pel"lus, (wolf's bane, b. J. %.) leaves shining, 5-parted ; the diyisioft$ 
3-parted by gashed incisions, subdivisions linear; upper lip of the corolla 
lanceolate, ascending, 2-cleft ; spur straight, obtuse. 2 f. Ex. 
' This genus is scarcely distinct from Asclepias. 
27* 
