SECTION IV. 

 SPECIES OF PLANTS. 



IIU'ES. See Pi'nus. 



ABU'TILON. See Si'da. 



dCA'CIA. 15—10. (LeguminosoE.) [From 



the Greek aka'zo, to sharpen.] 



glandulo'sa, (w. Ju. 2X-) leaves bipiunate, 

 leafets 12-paired, glands betw^ecn each 

 pair; spikes globose, solitary, peduncled, 

 axillaiy ; legume falcate ; unarmed. iS'. 



farneaia'iia, (black thorn, y. ^.) leaves 

 bipinnate, leafets 8-paired ; spikes globose, 

 sessile. Flowers fragrant ; legumes fusi- 

 form. S. 

 ACAL"YPHA. 19—15. (Euphorbia:.) [From 



the Greek a, not, kalos, agreeable, aphe, to 



the touch.] 



virgiii"ica, (three-seeded mercury, g. Au. 

 ^.) pubescent; leaves on short petioles, 

 lanceolate-oblong, remotely and obtusely 

 serrate ; involucre cordate, ovate, acumi- 

 nate, toothed ; fertile flowers at the base of 

 the sterile spike. Road-sides. 12 to 18 i. 

 Var. ca/olinia'na, with longer petioles and 

 broader leaves. 

 A'CER. 8—1. {Accra.) [Latin acer, acrid, 



referring to the juice of some of the species.] 



da'sycar'pum, (white maple, silver maple, 

 g-y. 1? ). 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'tnm, (hairy maple w-g. Ap. 1?.) 

 leaves bearl-ovate, short, 3-lobed, unequally 

 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'gnim, (sweet tree, black maple, y. 

 Ap. 7.) leaves palmate, 5-lobed, cordate, 

 with the sinus at the base closed, lobes 

 spreading, sinuate-toothed, downy beneath ; 

 ftawers corymbcd; 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. 

 ^.) leaves sub-S-lobcd, acute, toothed, pu- 

 bescent beneath; racemes compound, erect. 

 )5 f. Moiintains. 



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

 »? .) leaves palmate, S-lobcd, cordate at the 

 base, unequally gash-toothed, glaucous be- 

 neath, sinuses acute ; flowers in about fives, 

 in sessile umbels, with long pedicels ; germs 

 glabrous; stamens variable. Precocious. 

 50 f. 



sacchari'jium, (sugar maple, rock maple, 

 hard maple, r. y. M. ^ .) leaves palmate, 

 r.-lobed, at the base sub-cordate, acuminate, 

 siimute-toothed, glaucous beneath ; pedun- 



cles in a nodding corj^mb. Large tree 

 50 f. Fniit ovoid, smooth, the wings about 

 an inch long. 



stiia'tum, (striped maple, false dogwood, 

 moosewood, g. M. ^ .) lower leaves round- 

 ish, upper ones 3-cu.spidate-acuminate, 

 sharply serrate, glabrous; racemes simple, 

 pendant. Small tree, with a greenish, 

 striped bark. 15 f. 



ACER"ATES.* 18—5. (Asdepiada:.) [From 

 the Greek a, without, keras, horn.] 

 virid'^iflo'ra, (green milkweed, g. Ju. 2^.) 

 stem erect, simple, hairy; leaves oblong, 

 on short petioles, tomentose, obtuse ; um- 

 bels lateral, solitary, sub-sessile, nodding, 

 dense flowered ; umbels about 3 ; horns 

 of the nectary wanting. Sandy fields 

 Stem 2 f. 



ACHILLE'A. 17—2. {CorymUfercE.) [From 

 the Greek warrior Achil/es.1 

 miUefo'linm, (yarrow, milfoil, w. J. 14.-) 

 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, chaffy, the chaff" lance- 

 oblong. Naturalized. 15 i. 'S. 

 ACHYRAN"THES. 15—5. {Amaranthi.) 

 [From the Greek achu'ron, chaff, and anthos, 

 flower.] 



re'pcns, (forty knot, March. 2^.) stem pro- 

 cumbent, pubescent; leaves opposite, pe 

 tioled, lanceolate. Flowers in heads. 

 ACNI'DA. 20—5. {ChenopodecE.) [From the 

 Greek a, wanting, knide, a sting.] 

 caiinabi'na, (Water hemp, w. g. Ju. ^.) 

 leaves ovate-lanceolate ; capsules smooth, 

 acutely angled. Marshes. Can. to Flor. 

 Flowers small, green, in large panicles. 

 ACONI'TUM. 12—5. (RununcuIacccE .) [From 

 the Greek akone, rugged, in allusion to its 

 habit.] 

 ' uncina'tum, (monk's hood, b. J. 2^!.) stem 

 flexuose ; leaves palmate, 3 to 5-parted, 

 divisions rhomb-lanceolate, gash-toothed ; 

 upper lip of the corolla lengthened, convex, 

 beaked; stem twining, branching. Grows 

 on mountains and rough places. Culti- 

 vated. 2 f. 



napel"lus, (wolf's bane, b. J. 2/.) leaves 

 shining, ."S-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. (Aroidca:) [From a. with- 

 out, and kore, the pupil, because it was es- 

 teemed good for disorders of the eyes.) 

 caV'amus, (sweet flag, g-y. J. 2/-) spike 



Ifi 



* This jenus is scaicely distmct from As- 

 clepias. 



