Ai* O GON— ARE N ARI A. 
381 
ridged, central lobe rounded, crenulate. 
Shady »voods. Flowers pendulous. 1 f. 
A.PO'GJN. 17—1. (dehor aceoB.) [From a, 
without, pogon, beard.] 
humW'is, (y. Ap. ©.) stem glabrous ; rad- 
ical leaves sessile, cauline leaves, ligulate, 
acute, leaves entire, glabrous. 
APOCYNUM. 18—5. (Apocynea.) [From 
apo, against, and kunos, a dog.] 
androscemifo'lium, (dog-bane, r-w. J. 2^.) 
stem erect and branching ; leaves ovate ; 
cymes lateral and terminal ; tube of the 
corolla longer than the calyx, with a spread- 
ing limb. 3 f. 
cannab"inum, (g-y. J. 2/.) leaves lanceo- 
late, acute at each end, smooth on both 
sides ; cymes paniculate ; calyx as long as 
the tube of the coroUa. 
APTE'RIA. 3—1. (Junci.) [From the Greek 
rt, witiiout, pteris, win^s.] 
seta'cca, (w. and p. ^.) stem with minute, 
ovate, remote scales ; spikes with bifid 
branches. 6 i. S. 
AQUIJ.E'GIA. 12—5. (RanunculacecB.) [From 
the Latin aqua, vviiter, and ago, to gatlier, 
so called from the shape of its leaves, which 
retain water.] 
canaden"sis, (wild columbine, r. y. 
Ap. 2^.) horns straight; stamens exsert; 
leaves decompound. Growing frequently 
in crevices of rocks. 15 i. 
ccBrn'lia, (b. J. Z|.) horns twice as long as 
the petals ; nectaries acute ; segiiients of 
the leaves deeply lobed. 18-1. Southern. 
vnlga'ris, (garden columbine, J. IX-) horns 
incurved ; leafy ; stem and leaves glabrous ; 
leaves decompound. The nectariferous 
horns become numerous by culture ; one 
hollow horn within another. 1.5 i. Ex. 
brevisty'la, sub-pubescent; spur incurved, 
shorter than the limb ; stipe short, inclined ; 
etame'is shorter than the corolla. Upper 
Canada. 
formo'sa, (11. r.) spur straight, much 
longer than the limb ; sepals lanceolate, 
acute, 3 times the length of the petals ; 
style as long as the sepals. Oregon. 
AR"ABIS. 14—2. (Cruciferw.) [Probably named 
in Arabia ] 
lyra'ta, (w. A. $ .) stem and upper leaves 
Braooth and glaucous ; radical leaves lyrate- 
pinnatifid, often pilose; stem branched at 
the base ; pedicels much longer than the 
calyx. 10 i. 
canaden'sis, (w. J. 2^.) stem leaves ses- 
sile, oblong-lanceolate, narrow at the base, 
pubescent ; pedicels pubescent, rellexed in 
tlie fruit; siUques pendulou.s, sub-falcate, 
nerved. 2 f. 
rhorrtbo'idea, (spring cress, w. M. 2^.) 
leaves glabrous, rhomboidal, repand-tooth 
ed, the lower ones nearly round, on long 
petioles ; root tuberous. 15 i. Wet. 
denta'ta, w. Ap.) stellately pubes- 
cent ; radical leaves obovate, tapering at 
(he base into a petiole, as long as the limb, 
ftregularly sharp toothed ; cauline ones, 
oblong, clasping ; flowers mhiute ; petals 
spatulate, .scarcely longer than the calyx ; 
eilique short, spreading on very narrow 
pedicels, pointed with a nearly sessile stig- 
ma ; stem branched from the base Arka» 
sas. Mississippi. 
mgitta'ta, (wall-cress, w. J. @. $ .) leaves 
sub dentate, rough, with the pubescens 
often branched ; radical ones ovate or ob- 
long, attenuated into a petiole ; stem leaves 
lanceolate, sagittate, cordate; pedicels aa 
long as the calyx ; siliques straight and 
erect. 18 i. 
ARA'CHIS. 16-10 (Leguminosea.) [A Greek 
word, signifying a rooting plant.] 
hypogm'a, (pea-nut, false ground-nut, 0.) 
stem procumbent, pilose ; leaves pinnate , 
flowers axillary; peduncles become long, 
and the frait is ripened under ground. 
ARA'LIA. 5—5. (Aralim) [From ara, a 
bank in tlie sea, in allusion to the habit of 
tiie plant ] 
racemo'sa, (spikenard, w. J. 2^.) spread 
ing branches ; petioles 3-parted, the 
partitions 3-5-leaved ; leafets often heart- 
form ; branchlets axillary, leafy; umbels 
I many, sub-panicled, leafless above. Damp. 
I 4 f. 
midican'Hs, (g-w. J. 11.) stem ha-dly a 
caulis; leaf solitary, terqu in ate; scape short- 
er than the leaf ; umbels few. Wild sar 
saparilla. 15 i. S. 
spiiio'sa (shot-bush, angelica tree, w. y 
w. Au. ^.) stem and leaves thorny; 
leaves doubly pinnate ; leafets slightly 
serrate; panicles branching; umbels nu 
j merous. 
lARBU'TUS. 10—1. (EriccE.) 
j uva-ur"si, (bear-berry, kinnikinnick, w-r 
M. .) stem procumbent ; leaves wedge- 
obovate, entire ; beny 5-seeded. Diy, 
ban-en sand-plains, &c. Very abundant 
about the gi'eat lakes. 
alpi'na, (strawbeiry-tree, w. M. Tp.) stem 
procumbent; leaves obovate, acute, rugosse, 
serrate; racemes terminal. Canada. 
ARCHEMO'RA. 5—2. {Umbelliferm.) [From 
arclie, the conqueror, moros,a. fool, from poi 
soning those wlio eat it.] 
ambig"ua or iigid"a, (water drop-wort, 
w. An. 2^.) leaves gash-pinnate, 3-5 pairs, 
acute, leafets lance-linear, often falcate and 
mostly entire ; fruit ovate ; stem smooth. 
3-5 f. 
ARCTIUM. 17—1. (CinarocephalcB.) [From 
arktos, a bear, so called on account of its 
roughness.] 
lap"pa, (burdock, r. Au. 2^.) caulin^ 
leaves heart-form, petioled, toothed ; flow- 
ers panicled, globose ; calyx smooth. 
ARENA'RIA. 10—3. {Caryophyllem.) [From 
arena, sand.] 
laterijio/'a, (sand-wort, w. J. 11.) stem 
filiform, simple ; leaves ovate, obtuse, sub- 
i triple-nerved ; peduncles lateral, solitary, 
elongated, 2-cleft ; pedicels alternately brac- 
I ted ; corolla longer than the calyx. 6-10 i. 
I gla'bra, (2/.) very smooth ; stems numer- 
ous, erect, filiform; leaves subulate, linear 
flat, spreading; pedicels 1-flowered, elon 
gated, divaricate ; sepals ovate, obtuse, 
. shorter than the petals. Mountains. Flow- 
ers large, white. Stem 4-6 i. erect, slen 
der. 
1 scrpyllifo'lia, (thyme-le.ived saud-wort, 
