154 
RHEUM— BHODODENDRON. 
alnrfo'lius, (dwarf-alder, w-g. M. .) un- 
armed; leaves oval, acuminate, serrulate, 
pubescent on the nerves beneath ; flowers 
dioecious; peduncles 1-flowered, aggregate; 
calyx acute ; fruit turbinate ; berries black. 
Rocky hills. 
C(ithar"ticiiR, (buckthorn, y-g. .) branches 
spiny ; leaves opposite, ovate ; flowers 
4-cleft, dioecious. Mountain woods. 
franguloi'deux, (w g. M. unarmed; 
leaves oval, acuminate, serrulate, pubes- 
cent at the nerves beneath ; peduncles ag- 
gregate, 1-flowered; calyx acute; fruit 
turbinate ; berries black. 
carolin"ia'nus, (w. J. Ip.) unarmed; 
leaves alternate, oval-oblong, sub entire, 
ribbed, glabrous ; umbels peduncled ; flow- 
ers all fertile ; berry black, globose. 4-6 f. 
lanceohi'tns, ( Ip .) unarmed ; leaves nearly- 
opposite, oval, serrulate ; flowers very mi- 
nute, divisions spiked, alternately sessile on 
the rachis ; style 3-cleft ; berries 3-seeded. 
parv/fo lius, 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, 2 lobed, partly sur- 
rounding llie very short stamens ; styles 2, 
united below, very short and conical. S. 
minufAJlo'rus, (Oc. ^.) unarmed; leaves 
nearly opposite, oval, serrulate ; flowers 
very minute, divisions spiked, alternately 
sessile on the rachis ; style S-cleft ; berries 
3-seeded. 
RHE'UiVI. 9—3. {Polygonce.) [From R/ia, an 
ancient name of the Wolga, on whose banks 
it was discovered.] 
palma'ta, (rhubarb, J. 24!.) leaves pal- 
mate, acuminate. Ex. 
rhapo>i"ticum, (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. 
RHEX"IA. 8—1. {Mdastomi(F..) 
maria'na, (w r. Ju. 2X0 hairy; 
leaves lanceolate, acute at each end, 3- 
nerved, sub-petiolate ; calyx tubular, nearly 
smooth. Var. p^irpu'rca, has purple flow- 
ers; petals obovate, hairy on the outer sur- 
face. 
virgin"ica., (deer-grass, meadow-beauty, 
p. Ju. If.) stem with winged angles, square, 
somewhat 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. 2X-) stem nearly square, 
smooth ; leaves sub petioled, oval,serrulate, 
ciliate, 3-nerved, glabrous beneath, slightly 
hispid above; flowers involucred. 12-18 i. 
glahel'la, (deer-grass, p. Ju.) glabrous, 
stem terete ; leaves lanceolate and ovate, 
3-nerved, denticulate, slightly glaucous; 
calyx glutinous. 2-3 f. S. 
serrulaftn, (p. 2/.) .stem nearly square, gla- 
brous ; leaves small, sub-petioled, roundi.sh- 
oval, acute, smooth on both sides, margin 
serrulate, ba.se sub-ciliate ; flowers pedun- 
'lied, about in threes ; calyx glandular-hir- 
sute. 6-10 i. iS. 
In'tea, (y. Ju. hirsute ; leaves linear- 
lanceolate, sometimes wedge-form at the 
base, 3-nerved ; panicle pyramidal ; an 
thers erect, terminal. 18 i. S. 
angustifo'lia, (w. Ju. If.) anthers incum- 
bent ; leaves linear and lance-linear, some- 
what clu.stered ; plant hirsute. S. 
stricf'ta, (p. J. If.) 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, 
obtu.se, sessile, pube.scent on both sides; 
flowers generally solitary. S. 
RHINAN'THUS. 13-2. (Pediculares.) [From 
n«, nose, and anthos, flower.] 
cristagal"li, (yellow-rattle, y. J. @.) up- 
per lip of the corolla arched ; calyx smooth; 
leaves lanceolate, serrate, oppo.site : flow- 
ers axillary, somewhat spiked, yellow 
Meadows. 
RHIZOPHO'RA. 12-5. (Salicaricc.) [From 
rhizo, root, and pkero, to bear, on account of 
its peculiar root.] 
man"gle, (mangrove, ^ .) leaves acute 
ovate, opposite ; peduncles axillary ; fruit 
clavate, subulate. 
RfIODODEN"l)RON. 10-1. {Rhododendra.) \ 
[From rodon. a rose, dendron, tree ; so called I 
because it re.sembles tlie rose.] 
max" imnm, (wild ro.sebay, E.r. .lu. Ip.) 
leaves oblong, glabrous, paler beneath 
umbels terminal, dense ; corollas some- 
what bell form Var. rose'um, corolla 
pale rose color; segments roundish ; leaves 
obtuse at the base. Var. aV'hum, corolla 
smaller, white, segments oblong; leaves 
acute at the base. Var. prirpn'renm, co- 
rolla purple ; segments oblong ; leaves ob- 
tuse at the base, green on both sides. 4-20 f 
pon"ticnm, (ro.sebay, p. ^.) leaves oblong, 
glabroo3, both sides colored alike ; corymbs 
terminal ; corolla bell-wheel-form ; petals 
lanceolate. A native of Asia Minor. 
lappon"icum, (p. Ju. Ip.) flowers in termi- 
nal, leafy clusters, campanulate ; stamens 
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 fa.sciculate, lateral, 
and terminal ; calyx sub-foliaceous, hispid ; 
corolla rotate-campanulate ; stamens 10, 
erect, equal. 2-3 f. 
puncta'tnm, (r. Ju. ^.) leaves oval, lance- ' 
olate, glabrous, with resinous dots beneath ; 
I umbels terminal; corolla funnel-form ; cap- 
sules long. 4 6 f. St 
c<if.awbieri"f>e, (r. J. ^.) leaves short-oval, | 
glabrous, roundi.sh obtuse at each end; 
umbels terminal ; segments of the calyx 
narrow-oblong ; corolla campanulate. 3-4 f 
S. , , I 
arbo'reiim., grows about' 20 feet high, 
with immen.se bunches of dark scarlet ot 
' crimson velvet-like flowers. These flowers 
secrete honey in such abundance, that; 
, when th« tree is shaken, tno drops of lioney 
