RHO RHU 
RHY RIB 
8, Nat. Or. Alga. These plants are found in the 
ocean, on the sea-shore, &c — R. dentata, lycopo- 
diotdSs, pinastroldls, scorpiotdSs, subfascd. 
Rhodomenia. From rhodot, red, and hymen, a mem- 
brane. Linn. 24, Or. 8, Nat. Or. Alga. The 
species of this genus, like those of the one imme- 
diately preceding, are found in the ocean, &c. 
Synonymes: 1. Spharococcue bijidus. 2. S. ciHatus. 
3. S. c. angustus. 4. S. c.jubatue. 5. S.c.palmatus. 
6. S. c. spinosus. 7. S. cristatus. 8. S. laciniatus. 
9. S. Palmetto. 10. S. reniformis — R. bifldus 1, 
ciliatus 2, C. angustiis 3, C. jiibatus 4, C. palmdtua 5, 
C. spinOsUs 6, cristatus 7, lacinidtiLS 8, Palmltta 9, 
polycarpa, renifGrmis 10, sobolifSrils. 
Rhodora, see Rhododendron. 
Rhomb or Rhomboid, like a Rhombus. 
Rhomb-ovate, 1 between rhomboid and egg- 
Rhomboid-ovate, j shaped. 
Rhubarb, see Rhium. 
Rhus, Linn. Derived from rous, in Greek, which is 
from rhudd, a Celtic word signifying red ; alluding 
to the colour of the fruit and leaves of some species 
in autumn. Linn. 5, Or. 3, Nat. Or. Anacardiacea. 
The stove and greenhouse species will grow well 
in any common soil ; and may be readily increased 
by ripened cuttings planted in sand, under a glass; 
the stove species must be placed in heat. The 
hardy kinds are rather ornamental and well fitted 
for shrubberies ; some are propagated by cuttings 
of the roots, and others by cuttings and layers. 
The juice of R. radicans and Toxicodendron is milky, 
stains black, and is extremely poisonous. R. Cori- 
aria is powerfully astringent, and is used in tanning 
Turkey or Morocco leather. Synonymes: 1. R. 
Bucku Amela. 2. R. lucida. 3. Lauras caustica. 
4. R. lucida. 5. spicata. 6. oxyacinthoides. 7. 
caroliniana. elegans. 8. elongata. 9. theezans. 10. 
venenata, i 1 . juglandifolia, 
Acuininat& . . F. Ev. S. Nepal . . 1820 
Amela, i . . . H. De. S. Nepal . . 
alfiU .... G Er. S. C. 0. H. . 1824 
(UMdi .... O. Et. S. Mogadore . 1816 
angiistifftHi . . Grnsb. . . G. Er. S. C. G. H. . 17)4 
aromatieA . . Yellow . 6, H. De. S. N. Amer. . 1/73 
atomaria . . . Gm. yel. . G. Ev. S. C. G. H. . 1800 
Burmann!, 2. . Grn. yel. . 7, G. Ev. S. C. G. H. . 1797 
oaf.itica, 3 . . Gm. wht. G. Ev. S. Cliile . .1828 
Cavanille«n, 4 . White. . 7» G- Ev. S. Mexico. . 1697 
chinanils ... G. Ev. S. China . . 1800 
ciliata .... G. Ev. S. C. G. H. . 1816 
CcmmersOnn . . S. Ev. T. Brazil . . 1810 
conclnna ... G. Ev. S. C. G. H. . 1820 
eopallina . . . Gm. yel. . 8, H. De. S. N. Amer. . 1688 
Icucfintha . . Whitsh. . 8, H. De. S. N. Amer. . 
Coriaria . . . Grn. yel. . 7. H. De. T. S. Eiir. . . 1640 
Cotiniis . . . Pa. pur. . 6, H. De. S. S. Eur. . . 1656 
crenatA . . . Grn. vel. . G. Ev. S. C. G. H. 
cuneifaira . .Grn. Wht. G. Ev. S. C. G. H. .1816 
dentata, 6 . . Yelsh.. . G. Ev. S. C. G. H. .1793 
digitaU ... G. Ev. S. C. G. H. . 1820 
dioica, 6 . . . Grash. yeL G. Ev. S. Moeadore . 1825 
dissecta ... G. Ev. S. C. G. H. . 1820 
elesane . . . Red . . 7, H. De. S. N. Amer. . 1726 
elllptica ... . 7, G. Ev. S. C. G. H. . 1818 
excisa .... G. Ev. S. C. G. H. . 1816 
fragrans ... G. Ev. S. C. G. H. . 1824 
fraxinifdlia . . G. Ev. T. Nepal . . 1820 
glabra .... Grn. yel. . 8, H. De. S. N. Amer. . 1726 
coccinaa, 7 . Red . . 6, H. De. S. N. Amer. . 
dioica . . . Grnsh. . . 7. H. De. S. N. Amer. . 
hermaphrodita Grnsh. . .6, H. De. S. N. Amer. . 
plauca .... Gm. yeh . 7. G. Ev. 8. C. G. H. . 1821 
hcterophylla . . G. Ev. 8. C G. H. . 1800 
iutlsa .... Gra. yeL . G. Ev. 8. C. G. H. . 1789 
iavanica . . . White . . 8, G. Ev. T. Java . . 17.99 
laevigata, 8 . . Yelsh. w. . G. Ev. 8. C. G. H. . 1758 
lancia .... G. Ev. 8. C. G. H. . 1810 
lineatifOUa . . Cream . . 8, 8. Ev. 8. Cuba . . 1818 
lobata ... G. Ev. 8. Teneriffe . 1800 
lucida. . . .White. . 7, G. Ev. 8. C. G. H. .1697 
Metoplum . . S. Ev. 8. W. Ind. . 1823 
micrantha . . Grnsh. w. . G. Ev. 8. C. G. H. .1818 
mucronata . . G. Ev. 8. C. G. H. . 1824 
nervOsa . . Grnsh. yeL G. Ev. 8. C. G. H. . 1800 
obllqua ... E. Ev. S. C. G. H. . 1825 
cbscura ... .8, H. Dc. 8. Iberia . . 1820 
Oxyacantha . . Gm. yel. . H. De. 8. Barbary . 1823 
oxyacantholdes . Grn. yel. . H. De 8. Barbary . 1824 
paniculata . . Green . . 6, G. Ev. 8. Nepal , , 1823 
pauciflora . . G. Ev. 8. C. G. H. . 
pvndullna . . Gm. yol. . G. Ev. 8. C. G. H. . 
pentaphrUti . . Yellow . F. Ev. 8. Barbary . 1816 
^bc»r^ia. . . G.-n.y.'I . G. Ev. S. C. G. H. . 1800 
pumlla . . . Grn. yeL . 7, H. De. 8. N. Amer. . 1 806 
pyroidea ... G. Ev. 8. C. G. H. . 1816 
radicans . . . Gm. yel. . 6, H. De. Cr. N. Amer. . 
microcarpx . Grn. yeL . 6, H. De. Cl. N. Amer. . 
volubilis . . Gra. yel. . 6, H. De. Cl. N. Amer. , 
vulgaris . . Grn. yeL . 6, H. De. Cr. N. Amer. . 
rigida .... ■ G. Ev. 8. C. G. H. . 1700 
rosmarinifdlia . Green . . G. Ev. 8. C. G. H. . 1800 
schinoides . . 8. Ev. 8. Brazil . . 1824 
semialata ... G. Ev. T. Macao . . 1780 
serraefolia . . G. Ev. 8. C. G- H. *1816 
sinuata ... G. Ev. 8. C. G. H. . 1820 
suavedlans . . Grnsh. yeh 5, H. De. .S. N. Amer. . 
succedanaa . . Grn. yel. . 6, G. Ev. S. China . . 1768 
Thunbergiana . Grnsh. yel. G. Ev. 8. C. G. H. 
tomentosa . . Grn. yel . G. Ev. & C. G. H. . 1691 
Toxicodendron . Grn. vel. . 6, H. De. Cr. N. Amer. . 1640 
tridactylis . . Grn!«h. yel. G. Ev. 8. C. G. H. . 1816 
tridentata . . Grnsh. yel. G. Ev. Cl. C. G. H. . 1816 
trijuga ... G. Ev. 8. Brazil . . 
typhina . . . Grn. yel. . 7, H. De. T. N. Amer. . 1629 
arborescens . Grn. yel. . 7, H. De. T. 
frutescens . . Gm. vel. . 7, H. De. 8. 
undulata, 9 . . Whtsh.yel. H. De. 8. C. G. H. .1816 
vernix. 10 . . Grn. yel. . 7, H. De. T. N. Amer. . 1713 
vernicifera, 1 1 . Grn. yel. . H. De. T. Nepal . .1823 
vill6.«i4. . . . Grn. yel. . 7, G. Ev. 8. C. G. H. . 1714 
viminalis . . . Grn. yel. . G. Ev. 8. C. G. H. . 1774 
viridiflOra . . Grn. yel. . 7, H. De. T. N. Amer. . 
Zizyphina . . G. Ev. 8. Sicily . . 1800 
Rhynchosia, Loureiro. From rhynchos, a beak ; the 
keel of the flower is beaked. Linn. 17, Or. 4, Nat. 
Or. Leguminosa. These plants are not possessed 
of much beauty ; any rich light soil suits them ; 
and they are easily increased by cuttings or seeds. 
Synonymes: 1. Glycine angustifolia. 2. Dolichos 
scarabaoides. 3. Glycine earibaa. 4. G. tomentosa, 
volubilis. 5. G. ereeta. 6. Dolichos minimus. 7. 
G. mollis. 8. G. phaseoloides. 9. G. precatoria. 
10. G. reniformis. ll. G. reticulata. \2. G. rhombi- 
folia. 13. Dolichos scarabaoides. 14. G. suaveolens. 15. 
G. picta, Cytisus violaceus. 16. G. viscosa, glutinosa. 
carib*a. 3 . . Yellow . 9, 8. Ev. Tw. W. Ind. . 1742 
ereeta, 5 . . . Sulphur . 7, H. Her. P. N. Amer. 1820 
reniformis, 10 . Yellow . 7» F. De. Tw. Carolina . 1806 
reticulata, 11 .White. . 8,8. Ev. Tw. Jamaica . 1779 
suaveolens, 14 . Yel. red . 8, 8. Ev. 8. E. Ind. . 1816 
R. angustifoHi 1, b\fl0ri 2, d\ff^rmis 4, Fredericiani, 
minima 6, mOllls 7, phaseoloides 8, precatOrid 9, 
rhomhifOlld 12, scarabaoides 13, violaced 15, viscOsd 16. 
RhynchospSra, Vahl. From rhynchos, a beak, and 
spora, a seed. Linn. 3, Or. 1, Nat. Or. Cyperacea. 
Worthless plants, growing in bogs, &c. — R. alba, 
comatd, fused. 
RhytIsma, Fries. From rhytis, a wrinkle; appear- 
ance of the plants. Linn. 24, Or. 9, Nat Or. Fungi. 
Found upon sycamore leaves and other live plants, 
as some of the specific appellations imply — R. ace- 
rlnOm, Andromeda, corrugutdm, punetdtOm, solid- 
nOm, Urtica. 
Rib, the projecting vein of anything. 
Ribrs, Linn. From Ribas, the name of an acid plant 
mentioned by the Arabian physicians, which is 
known to be Rheum Ribes. Linn 5, Or. 1, Nat. Or. 
Grossulacea. This is a valuable genus, and con- 
tains the gooseberry and currant, the uses of which 
every cottager is familiar with ; and in addition to 
these much esteemed fruits, some of the species 
are well suited for ornamenting shrubberies. The 
most ornamental species are R. atropurpureum, 
aureum, sanguineum, and speciosum. All the spe- 
cies of Ribes will grow in any soil, and increase 
from cuttings, planted in autumn, or early in spring. 
Synonymes: 1. R. aureum sanguineum. 2. R. hyhri- 
dum. 3. R. reclinatum. 4. Uvacrispa. 5. R. oxy- 
acanthoides. 6. R. glandulosum. 7. R. laxijlorum. 
8. R. malvaceum. 9. R. stamineum. 10. R. missou- 
riense. 11. R. stamineum. 
acicuISr^ . . . White . . H. De. 8. Siberia . 
albiuervlum . . Green . . 4, H. De. 8. N. Amer. 
alpinam . . . Green . . 4, H. De. 8. Britain . . 
fOliis-varieg&tis Green . . 5, H. De. 8. Britain . . 
pumilum . . Green . . 4, H. De. 8. 
aureum .... Yellow . 5, H. De. 8. Missouri . 1812 
pr^ux . . . Yellow . 4, H. De. 8. N. Amer. . 1812 
serotinum . . Yellow . 6, H. De. 8. N. Amer. . 1812 
villosum . .Yellow . 4, H. De. 8. N. Amer. .1812 
carpathicum . . Green . . 4, H. De. 8. Carpathia . 1818 
cereum .... White. . 4, H. De. 8. N. Amer. . 1827 
Cynosbatl . . . Green . . 4, H. De. 8. Canada . . 1759 
DiacAnthA . . . Grn. yel. . .5, H. De. 8. Siberia . . 1781 
divaiicAtum . . Wht. red . 4, H. De. S. N. Amer. . 1826 
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