R H O 
This genus of plants is ranged in the firft febtion of 
Linnaeus’s tenth clafs, which contains thofe plants 
whofe flowers have ten ftamina and one ftyle. 
The Species are, 
1. Rhododendron ( Hirfutum ) foliis ciliatis nudis, co- 
rollis infundibuliformibus. Lin. Sp. Plant. 292. Rofe- 
bay with naked hairy leaves , and funnel-Jhaped petals. 
Chamasrhododendros Alpina, villofa. Tourn. Inlt. R. 
PI. 604. Hairy Alpine Dwarf Rofe-bay. 
2. Rhododendron ( Ferrugineum ) foliis glabris, fubtus 
leprofis, corollis infundibuliformibus. Lin. Sp. Plant. 
39 2. Rofe-bay with fmooth leaves which are hoary on their 
under fide, and funnel-Jhaped petals. Chamaerhododen- 
dros Alpina glabra. Tourn. Inft. R. H. 604. Smooth 
Alpine Dwarf Rofe-bay. 
The firft fort grows naturally on the Alps, and alfo 
upon feveral mountains in Italy. This is a low fhrub, 
. which feldom rifes two feet high, lending out many 
fhort ligneous branches, covered with a light brown 
bark, and garnifhed clofely with oval fpear-fhaped 
leaves about half an inch long, and a quarter of an 
inch broad, fitting pretty dole to the branches ; they 
are entire, and have a great number of fine iron- 
coloured hairs on their edges and under fide. The 
flowers are produced in bunches at the end of the 
branches ; they have one funnel-lbaped petal ; the 
tube is about half an inch long ; the brim is cut into 
five obtufe fegments, which fpread half open ; they 
are of a pale red colour, and have ten ftamina in 
each, which are the length of the tube ; after the 
flowers are paft, the germen in the center turns to an 
oval capfule with five cells, filled with fmall feeds. It 
flowers in May, and the feeds ripen in Auguft. 
The fecond fort grows naturally on the Alps and 
Apennines ; this rifes with a fhrubby ftalk near three 
feet high, fending out many irregular branches, co- 
vtred with a purplilh bark, and clofely garnlfhed 
with fmooth fpear-fhaped leaves an inch and a half 
long, and half an inch broad in the middle ; they 
are entire, and their borders are reflexed backward ; 
the upper fide is of a light lucid green, and their 
under fide of an iron colour; they are placed all 
round the branches without any order. The flow- 
ers are produced in round bunches at the end of the 
branches ; they are funnel-fhaped, having Ihort tubes, 
which are cut into five obtufe fegments at the brim, 
which fpread a little open ; they are of a pale Rofe 
colour, and make a good appearance. This fort 
flowers in June, but does not ripen feeds here. 
There ,are fome other fpecies of this genus which grow 
naturally in the eaftern countries, and others are na- 
tives of America, but the two forts here mentioned are 
all I have feen in the Englifh gardens •, and thefe are 
difficult to propagate and preferve in gardens, for they 
grow naturally upon barren rocky foils and in cold fi- 
tuations, where they are covered with fnow great part 
of the winter ; fo that when they are planted in better 
ground, they do not thrive, and for want of their 
ufual covering of fnow in winter, they are frequently 
killed by froft ; but could thefe plants be tamed, and 
propagated in plenty, they would be great ornaments 
to the gardens. 
They are propagated by feeds, but thefe are fo very 
fmall, that if they are covered deep, they will not 
grow. The feeds fhould be fown as foon as pofllble 
after they are ripe, either in fhady borders or pots 
filled with freffi gentle loamy earth, and very light- 
ly covered with a little fine earth ; then the pots 
fhould be plunged up to their rims in a fhady bor- 
der, and in hard froft they 'fhould be covered with 
bell or hand-glafies, taking them off in mild wea- 
ther. If thefe feeds are fown early in autumn, the 
plants will come up the following fpring •, thefe mnft 
be kept fhaded from the fun, efpecially the firft 
fummer, and duly refrefhed with water, and in au- 
tumn following, they may be tranfplanted to a fhady 
fituation and on a loamy foil, covering the ground 
about their roots with Mofs, which will guard them 
from froft in winter, and keep the ground moift in 
fummer. 
R H U 
RHUS. Tourn. inft. R. H. 61 1. tab. 381. Lin. 
Gen. Plant. 331. [pA takes its name from fA to flow, 
becaufe it ftops dyfenterial fluxes of the bov/els.] Su- 
vf-mach. 
The Characters are. 
The empalement of the flower is permanent , ereEl, and 
cut into five parts. The flower has five oval , erehl* 
fpreading petals , and five Jhvrt ftamina terminated by 
fmall fummits , floor ter than the petals ; it has a roilnd - 
ifio germen as large as the petals , with ficarce any ftyle , 
crowned by three fmall ftigmas. The germen afterward 
becomes a roundijh hairy %erry, inclofing a fingle hard feed 
of the fame form. 
This genus of plants is ranged in the third feflion 
of Linnaeus’s fifth clafs, which includes thofe plants/ 
whofe flowers have five ftamina and three ftyles. 
The Species are, 
1. Rhus ( Coriaria ) foliis pinnatis obtufiufcule ferratis, 
ovalibus fubtus villofis. Lin. Sp. Plant. 379. Sumach 
with winged leaves which are obtufely flawed , oval, and 
hairy on their under fide. Rhus folio ulmi. C. B. P. 
4 1 4. Elm-leaved Sumach. 
2. Rhus ( Typhinum ) foliis pinnatis lanceolatis, argute 
ferratis fubtus tomentofis. Amcen. Acad. 4. p. 31 1. 
Sumach with fpear-fhaped winged leaves which are 
jharply flawed , and woolly on their under fide. Rhus 
Virginianum. C. B. P. App. 517. Virginian Sumach. 
3. Rhus ( Glabrum ) foliis pinnatis ferratis lanceolatis 
utrinque glabris. Sumach with winged leaves which are 
fpear-fhaped , and fmooth on both fides. Rhus Virgini- 
cum, panicula fparia, ranks patulis glabris. Hort. 
Elth. 323. Virginian Sumach with a loofe panicle, and 
fmooth fpreading branches. 
4. Rhus ( Carolinianum ) foliis pinnatis ferratis lanceolatis, 
fubtus incanis, panicula compacfta. Sumach with faw- 
ed, fpear floaped , winged leaves which are hoary on their 
under fide, with a comp abl panicle. Rhus Carolinianum, 
panicula fpeciofa coccinea. Catefb. Hift. Carol. Caro- 
lina Sumach having a beautiful fcarlet panicle. 
5. Rhus ( CanadenJ'e ) foliis pinnatis, obfolete ferratis, 
lanceolatis, utrinque glabris, panicula compofita. 
Sumach with winged fpear-fhaped leaves which are Jlight- 
ly fawed , and a compound panicle. Rhus Canadenfe 
folio longiori utrinque glabro. Tourn. Inft. R. H. 
6 1 1 . Canada Sumach , with a longer leaf which is fmooth 
on both fides. 
6. Rhus ( Copallinum ) foliis pinnatis integerrimis, petio- 
lo membranaceo articulato. Flor. Leyd. Prod. 24. 
Sumach with entire winged leaves , and a jointed membra- 
naceous footflalk. Rhus anguftifolium. C. B. P. 414. 
Narrow-leaved Sumach. 
7. Rhus ( Chinenfe ) foliis pinnatis, foliolis ovatis, obtuse 
ferratis, petiolo membranaceo villofo. Sumach with 
winged flalks, oval lobes which are bluntly fawed , and a 
hairy foot-ftalk having jointed membranes or wings. Rhus 
Sinarum labtefcens, cofta foliorum alata. Pluk. Am. 
183. China milky Sumach , with winged membranes to the 
leaves. 
8. Rhus ( Incanum ) foliis ternatis, foliolis ovatis fubtus 
tomentofis. Three-leaved Sumach , with oval leaves which 
are downy on their under fide. Rhus Africanum ma- 
jus folio fubrotundo integro, molli & incano. Pluk. 
Phyt. tab. 219. fig. 8. Greater , three-leaved , Afri- 
can Sumach , with a rounder entire leaf which is foft and 
hoary. 
9. Rhus ( Tomentofum ) foliis ternatis foliolis fubpetiola- 
tis, rhombeis angulatis, fubtus tomentofis. Lin. Sp. 
Plant. 266. Three-leaved Sumach with angular rhomboid 
lobes having foot-ftalks , and downy on their- under fide . 
Rhus Africanum trifoliatum majus, foliis obtufis & 
incifis hirfutis pubefcentibus. Pluk. Phyt. tab. 2 jq. 
fig.- 7. Greater , African , three-leaved Sumach , with ob- 
tufe cut leaves which are covered with foft hairs. 
10. Rhus ( Lucidum ) foliis ternatis, foliolis feffilibus 
cuneiformibus laevibus. Vir. Cliff. 25. Three-leaved 
Sumach whofe lobes are fmooth , wedge-foaped, and fit 
clofe to the ftalk. Rhus Africanum, trifoliatum mi- 
nus glabrum, fplendente folio, fubrotundo integro., 
Pluk. Phyt. -219. fig. 9. Three-leaved African Sumach, 
with a fmooth , Jhining , roundijh , entire leaf which is j. mail, 
ii, Rhus 
