74 
ALYSSUM-AMYRIS. 
ALYSSUM. 14—1. {Crucifera.') [From the Greek alluso, mad; this plant bein-^ foimerlr 
supposed to be a cure for the bite of a mad dog.] 
hyperbo'reum, stem herbaceous ; leaves hoary, toothed ; stamens 4, 2-forked. 
saxaWle, (y, T7.) gold basket. Flowers in panicles, leaves lanceolate, soft, 
retuse, Ex. 
AMARANTHU3. 19—5. {Amaranthi.) [Signifying not withering.] 
albus, (white coxcomb, g-w. Ju. 0.) glomerules axillary, triandrous ; leaves 
obovate, retuse ; stem 4-cornered, simple. Common garden weed. 
melanchoVims, (love lies bleeding, r. <v).) glomerules axillary, pedancled, 
roundish ; leaves lance-ovate, coloured. Ex. 
tri-colour, glomerules sessile, leaves lance-oblong, coloured. Ex, 
Uvid^us, g\omevvi\es triandrous, sub-spiked roundish; leaves oval, retuse; 
stem erect. Ex. 
AMARYLLIS. 6—1. (Narcissi.) 
atamas^co, (atamasco lily, w. and r. J. %.) spatha 2-cleff7 acute ; flower pedi- 
celled ; corolla bell-form, sub-equal, erect ; stamens declined. ^S. 
formosis"sima, (jacobea. %.) spatha 1-flowered ; corolla ringent-like ; petals 
declined. Ex. 
undula'ta, (waved lily, Sept.) The flowers numerous on each stalk; petals 
pink, undulate. Ex. 
AMBROSIA. 19 — 4. (Urticea.) [The name amSro-sm, food for the gods, seems strangely mis 
applied to a genus of plants possessing neither beauty nor valuable properties.] 
elati^or, (hog-weed, S. 0.) leaves doubly pinnatifid, smoothish ; petioles long, 
ciliated; racemes terminal, panicled ; stem wand-like. 
triji'da, (g. y. S.) hirsute, rough ; leaves very large, S-lobed, serrate ; the 
lobes oval-lanceolate, acuminate ; fruit 6-spined below the summit. Flow- 
ers in terminal panicles composed of long axillary spikes. 5 to 8 f. 
AMORPHA. 16 — 10. {LeguminoscB.) [From the Greek o, wanting, morpAe, shape.] 
frutico'sa^ (Ju. T^.) smooth, sub-arborescent; leaves petioled, emarginate ; 
spikes aggregated, long ;^ calyx hoary, pedicelled, one of the teeth acumi- 
nate, the rest obtuse ; legume few-seeded. N. J. to Car. and W. to Rocky 
Mountains. A shrub with spikes of purple flowers. 
pubes'cens, (w. J. T2.) small, shrubby; leaves on very short petioles, obtuse at 
each end, hairy; spike long, panicled, hairy; calyx sub-sessile, with acu- 
minate teeth. 3 f. 
AMPELOPSIS, 5—1. ( Vites.) [From the Greek ampelosa, vine, and ops, resembling.] 
quinquefo'lia,'!' (g. Ju. % ) stem climbing and rooting ; leaves quinate, digita'te, 
smooth; leafets petiolate, oblong, acuminate, toothed; racemes dichoto- 
mous. Var. hirsuta, leaves pubescent on both sides ; leafets ovate, coarsely 
toothed. 
cordata, (Ju. T^.) stem climbing, with slender branches; leaves cordate, acu- 
minate, toothed, and angular ; nerves beneath pubescent ; racemes dichoto- 
mous, few-flowered. Banks of streams. Panicles opposite the leaves. 
bipin'natea, leaves doubly pinnate ; lance-ovate, deeply toothed and lobed 
Flowers in corymbs. Southern. 
AMPHICARPA. 16 — 10. (LeguminoscR.) [From the Greek amphi, about, karpos, the fruit.] 
mono'ica, (wild bean-vine, b. and w. Ju. ©.) stem slender, twining, hairy 
backwards ; leaves ternate, ovate, nearly smooth ; stipules ovate, striate. 
Var. comosa has hirsute leaves. Twining. 4 f. 
AMYGDALTJS. 11—1. (Rosacem.) [Derived from a Greek word, which signifies to lacerate, 
alluding to the furrows upon the pericarp of the almond.] 
per^sica, (peach, r. M. Yi.) serratures of the leaves all acute, flowers sessile, 
solitary. 15 f. Ex. 
na'na, (flowering almond, T^.) leaves ovate, tapering to the base, sharply ser- 
rate. 3 f Ex. 
com'munis, (almond,) leaves serrate, the lower ones glandular ; flowers ses- 
sile, binate. Ex. 
AMYRIS. 8—1. (TerebintaceoR.) [From the Greek, signifying balm or ointment, so called 
from its use, or smell. Ex.] 
Jlorida'na, (w. h.) leaves ovate, sessile, entire, obtuse ; flower sub-panicled. 
Cissus hederaceaof Mirbel. 
