460 
RHEUM— RHODODENDRON. 
mniJoUus (dwarf-alder, w-g. M. T?.) un- 
armed, lea\es oval, acamiiiate, serrulate, 
pubescent on the nerves beneath ; flowers 
dicBcicus; peduncles 1-flowered, aggregate 
calyx acute ; fruit turbinate ; berries black 
Rocky hills. 
catha/'ticus, (buckthorn, y-g. .) branches 
spiny ; leaves opposite, ovate ; flowers 
4- cleft, dioecious. Mountain woods. 
franguloi'deus, (w-g. M. 1?.) unarmed; 
leaves oval, acuminate, serrulate, pubes- 
nent at the nerves beneath ; peduncles ag- 
gregate, 1-flowered; calyx acute; fruit 
turbinate ; berries black. 
carol'm"ia!nusi, (w. J. 1? .) unarmed ; 
l<»saves alternate, ova'-oblong, sub-entire, 
libbed, glabrous ; umbels peduncled ; flow- 
enrs all fertile; berry black, globose. 4-6 f. 
I.nnceohi'tns, ( .) unarmed ; leaves nearly 
opposite, oval, serrulate ; flowers very mi- 
nute, divisions spiked, alternately sessile on 
the rachis ; style 3-cleft ; berries 3-seeded. 
parvifo lins, unarmed ; leaves ovate, ser- 
rulate, when young, pubescent, acute, or 
emarginate ; flowers solitary, or 2 to 3 to- 
gether, axillary, short pedicelled, tetan- 
drous ; petals minute, a lohed, partly sur- 
rounding the very short stamens ; styles 2, 
united below, very short and conical. S. 
miimtijlo'rus, (Oc. ^.) unarmed; leaves 
nearly opposite, oval, serrulate ; flowers 
very minute, divisions spiked, alternately 
sessile on the rachis ; style 3 cleft ; hemes 
5- seeded. 
RHE'UM. 9—3. {Polygonae.) [From R/ia, an 
ancient name of the Wolga, on whose banks 
it was discovered.] 
pahna'ta, (rhubarb, J. 2^.) leaves pal- 
mate, acuminate. Ex. 
rhapoii!'ticnm, (pie rhubarb, w. J. 11) 
leaves heart-ovate, obtuse and acute, 
smooth ; veins sub -pilose beneath, the sinu- 
ses at the base dilated ; petioles furrowed 
on the upper side, rounded at the edge ; 
radical leaves very large. 2-4 f. Ex. 
RHFX'IA. 8—1. (Mdastomia.) 
maria'na, (w-r. Ju. 21.) very hairy; 
leaves lanceolate, acute at each end, 3- 
nerved, sub-petiolate ; calyx tubular, nearly 
smooth. Var. piirpu'rea, has purple flow- 
ers ; petals obovate, hairy on the outer sur- 
face. 
virgin"ica, (deer-gi-ass, meadow-beauty, 
p. Ju. 2_f.) stem with winged angles, square, 
Bomewhat hairy ; leaves sessile, ovate-lan- 
ceolate, ciliate, serrate, 3-7 nerved, sprin- 
kled with hairs on both sides ; corymbs di- 
chotomous. Wet meadows. 1 f. 
cilio'sa, (p. Ju. IX.) stem nearly square, 
smooth ; leaves sub-petioled, oval,serrulate, 
ciliate, 3-nerved, glabrous beneath, slightly 
hispid above; flowers involucred. 12-18 i. 
glabel'la, (deer-grass, p. Ju.) glabrous, 
stem terete ; leaves lanceolate and ovate, 
3-nerved, denticulate, slightly glaucous ; 
calyx glutinous. 2-3 f. S. 
semda!ta, (p. Lf.) stem nearly square, gla- 
brous ; leaves small, sub-petioled, roundish- 
oval, acute, smooth on both sides, margin | 
serrulate, base sub-ciliate ; flowers pedun- j 
?led, about in threes ; calyx glandular-hir- 
aule. 6-10 i. «.S I 
I lu'tea, (y. Ju. ^.) hirsute ; leaves linear 
lanceolate, sometimes wedge-form at the 
base, 3-nerved ; panicle pyramidal ; aa 
thers erect, terminal. 18 i. S. 
anguRtifo'lia, (w. Ju. ll) anthers incum- 
bent ; leaves linear and lance-linear, some- 
what clustered ; plant hirsute. S. 
stricf'ta, (p. J. IX-) stem 4 angled, straight 
winged, glabrous, bearded at the joints 
leaves sessile, narrow lanceolate, acumi- 
nate, 3-nerved, glabrous on both sides ; cor- 
ymb dichotomous. S. 
linearifo'lia, (y.) stem cylindrical, sub- 
pubescent; leaves alternate, linear, oblong, 
obtuse, sessile, pubescent on both sides , 
flowers generally solitary. S. 
RniNAN"THnS. 13-2. {Pediculares.) [From 
rin, nose, and anthos, flower.] 
cristagaV'li, (yellow-rattle, y. J. @.) up- 
per lip of the corolla arched ; calyx smooth; 
leaves lanceolate, serrate, opposite : flow- 
ers axillary, somewhat ppiked, yellow 
Meadows. 
RHIZOPIIO'RA. 12-5. (Salicaria;.) [Froir 
rhizo, root, and phero, to bear, on accouni ol 
its peculiar root.] 
rnan"gle, (mangrove, fp.) leaves acute 
ovate, opposite; peduncles axillary; fiail 
clavate, subulate. 
RHODODEN"DRON. 10—1. (Rhododendra.) 
[From rodon. a rose, dendron, tree ; 90 called 
because it resembles the rose.] 
max" imum, {wild rosebay, E.r. Ju. ^.1 
leaves oblong, glabrous, paler beneath 
umbels terminal, dense; corollas some- 
what bell-form. Var. rose'nin, corolla 
pale rose color; segments roundish ; leaves 
obtuse at the base. Var. aV'hnm, corolla 
smaller, white, segments oblong; leaves 
acute at the base. Var. piirpu'reum, co- 
rolla purple ; segments oblong ; leaves ob 
tuse at the base, green on both sides. 4-20 f 
pon"ticitm, (rosebay, p. leaves oblong, 
glabrous, both sides colored alike ; corymbs 
terminal ; corolla bell-wheel-form ; petals 
lanceolate. A native of Asia Minor. 
lapponf'icum, (p. Ju. ^ .) flowers in termi- 
nal, leafy clusters, campanulate ; stamenn 
mostly 8 ; leaves elliptical, punctured, cori 
aceous, evergreen ; shrub 8-10 i. White 
hills. 
albijlo'mm, (w. ^ .) erect ; leaves decidu- 
ous, lance-oval, very entire, membrana- 
ceous, glabrous, fasciculate in the apex of 
the branches; peduncles fasciculate, latera. 
and terminal ; calyx sub-foliaceous, hispid 
corolla rotate-campanulate ; stamens 10 
erect, equal. 2-3 f. 
puncta'tum, (r. Ju. ^.) leaves oval, lance- 
olate, glabrous, with resinous dots beneath 
umbels terminal; corolla funnel-form ; cap- 
sules long. 4-6 f. <S. 
catawbien"se, (r. J. .) leaves short-oval, 
glabrous, roundish obtuse at each end ; 
umbels terminal ; segments of the calyx 
narrow-oblong ; corolla campanulate. 3-4 f 
S. 
arbo'reum, grows about 20 feet high 
with immense bunches of dark scarlet 01 
crimson velvet-like flowers. These flowera 
secrete honey in such abundance, that 
when the tree is shaken, toe d>-opfc of liouey 
