SECTION IV. 

 SPECIES OF PLANTS, 



ACACIA. 15 — 10. (Leguminosm.) [From the Greek alca'zo, to sharpen.] 

 glandulo'sa, (w. Ju. %..) leaves bipimiate, leafets 12-paired, glands between 

 each pair ; spikes globose, solitary, pedancled, axillary ; legume falcate ; 

 unarmed. /S. 

 fariiesia'na, (y. l^.) leaves bipinnate, leafets 8-paired; spikes globose, sessile. 

 Flowers fragrant, legumes fusiform. 5'. 



ACALYPHA. 19—15. iEuphorbia.) [From tlie Greek a, not, A-a/os, agreeable, a;j/je, to the 

 touch. 1 



virgin"ica, (three-seeded mercury, g. An. O.) pubescent; leaves on short pe- 

 tioles, lanceolate-oblong, remotely and obtusely serrate; involucre cordate, 

 ovate, acuminate, toothed ; fertile flowers at the base of the steril spike. 

 Road-sides. 12 to 18 i. 

 ACER. 8 — 1. (Acera.) [Latin acer, acrid, referring to the juice of some of the species.] 



ru'brum, (red maple, soft maple, r. Ap. I2.) 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. 



sacckari'imm, (sugar maple, rock maple, hard maple, r. y. M. T-j.) 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, false dogwood, moosewood, 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. 

 A.CERATES.* 18—5. (Asclepiadai.) [From the Greek a, witliout, ieras, horn.] 



virld"ifiora, (green milkweed, g. Ju. %.) stem erect, simple, hairy ; l?aves 

 oblong, on short petioles; tomentose, obtuse; umbels lateral, solitary sub- 

 sessile, nodding, dense ; horns of the nectary v/anting. Sandy fields. 

 Stem 2 f. Flowers green. 

 A.CHILLEA. 17—2. (Corymbiferm.) [From the Greek warrior ^cAiVfcs.] 



millefo'lium, (yarrow, milfoil, w. J. %.) leaves 2-pinnatifid, downy ; llie di- 

 visions linear, toothed, mucronate ; calyx and stem furrowed. 15 i. o. 

 ACHYRANTHES. 15—5. (Amaranthi.) [From the Greek achu'ron, chaff, and anthos, flower.] 



re'pens, (forty knot, March. %.) stem procumbent, pubescent; leaves opposite, 

 petioled, lanceolate. Flowers in heads. 

 ACNIDA. 20—5. (Chcnopoders.) [From the Greek a, wanting, AniWe, a sting.] 



canvMbi'num, (water hemp, w. g. Ju. <v).) leaves ovate-lanceolate ; capsules 

 smooth, acutely angled. Marshes. Can. to Flor. Flowers small, green, in 

 large panicles. 



ACONITUM. 12 — 5. (RaimnculacecB.) [From the Greek akone, rugged, in allusioi; to its 

 habit.] 

 VMcina'Uim, (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. 

 napeVlus, (wolf's bane, b. J. Tj..) leaves shining, 5-parted ; the divisions 

 3-parted by gashed incisions, subdivisions linear; upper lip of the corolla 

 lanceolate, ascending, 2-cleft , spur straight, obtuse. 2 f. Ex. 



' This gertus is scarcely distinct from Asclepias 

 27* 



