AN ENCYCLOPADIA 
OF HORTICULTURE. 289 
RHEUMATISM ROOT. A common name for 
Jeffersonia diphylla. 
RHEXIA (from rhezxis, a rupture; applied to this 
genus for no obvious reason). Orp. Melastomacee. A 
genus comprising about seven species of mostly hardy, 
pretty, erect herbs or sub-shrubs, natives of extra-tropical 
Eastern North America. Flowers variously coloured, soli- 
tary or cymose; calyx tube oblong, campanulate, or urceo- 
late, the dilated limb of four triangular or subulate 
lobes; petals four, obovate; stamens eight. Leaves oblong, 
shortly petiolate, three-nerved, entire or, bristly-serrulate. 
The species described below are all hardy herbs. They 
thrive best in a bed of peat, but are sometimes grown 
in pots of the same soil. Propagation may be readily 
effected by division. Some of the plants formerly placed 
under this genus are now included under Pleroma 
(which see). 
R. ciliosa (hair-fringed).* A. purple, lin. to Lin. in diameter ; 
cyme few-flowered, leafy. July and August. J. rarely as much 
as lin. long, ovate, bristly on the upper surface, three-ribbed. 
Stem simple, 1ft. to 14ft. high, smooth, four-angled above. 1812, 
(S. B; F. G. 298.) 
R. mariana (Maryland). f. porpis, liin. to 2in. wide, hairy ex- 
ternally; calyx mostly smooth. July to September. J. lanceo- 
late, acute, short-petioled, bristly-serrate, three-ribbed. Stem 
lft. to 2ft. high, branched, terete or six-angled, 1759. Plant 
bristly. This species varies with narrower, often linear leaves, 
and smaller, whitish flowers. (L. B. C. 366; S. B. F. G. 41.) 
R. vir ca (Virginian).* Deer Grass; Meadow Beauty. 
jl. bright purple, cymose. July and August. l. ovate and ovate- 
lanceolate, barely acute, sessile, bristly-serrate, three to five- 
ribbed, the lowest rounded. Stem 6in. to 12in. high, four-angled, 
nearly simple. 1759. Plant bristly. (B. M. 968; Gn. ii, 294, 69; 
L. B. C. 840.) 
RHINACANTHUS (from rhis, rhinos, the nose, 
and Acanthus; alluding to the curious shape of the 
Acanthus-like corolla). ORD. Acanthacew. A small genus 
(about four species) of stove, loosely branched, sometimes 
sub-scandent shrubs, natives of tropical and South Africa, 
Madagascar, the East Indies, and the Malayan Archi- 
pelago. Flowers few, at the axils of the bracts, sub- 
sessile, sometimes fascicled or cymose and paniculate ; 
ealyx deeply five-cut, with narrow segments ; corolla with 
an elongated tube and a bilabiate limb, the dorsal lip 
bidentate, the anterior one trifid; stamens two, affixed to 
the throat of the corolla. Leaves entire. The best-known 
species is described below. For culture, — 
communis Ringworm Root. white ; upper lip 
bs ear ett cenit illary or terminal, ite trichpeoanoaaly 
spreading, June. l oblong or ovate-oblong. h. 2ft. East 
Indies, 1790. (B. M. 325, under name of Justicia 
RHINANTHACEZ. Included under Scrophula- 
rinee. ¢ 
RHINANTHUS (from rhis, rhinos, the nose, and 
anthos, a flower; alluding to the form of the corolla). 
Yellow Rattle. Syn. Alectorolophus. ORD. Scrophu- 
larinee. A genus comprising two or three very vari- 
able, erect, hardy annuals, natives of Europe, temperate 
and North Asia, and North America, Flowers sessile 
in the axils of the floral leaves, ebracteolate, upper ones 
spicate ; calyx four-toothed; corolla yellow, violet, = 
blue, often spotted, with a bilabiate limb, the upper lip 
entire, the lower one of three spreading lobes. Leaves 
opposite; cauline ones crenate; floral ones often incised- 
toothed, with the teeth setaceo-cuspidate. The — 
are more or less parasitic on the roots of grasses, rH à 
thrive in any moist situation: they may be propagate 
— 5 Yellow Rattle, &c 
R. Crista-galli (Cock’s-spur). Penny- 3. Yel , &c. 
Ji., corolla yellow, the upper lip blue. ay to J tes apep ong 
to 2in. long, oblong-lanceolate or —— h, erect, simple 
deeply crenate-serrate. Stem 6in. 
or sanched. Europe (Britain). (Sy. En. B. under name of 
R. minor.) 
— grea . orange-yellow ; corolla tube 
g —— — — lobes of the upper lip longer than 
broad ; lower lip shorter than the upper. 
autumn. 1. opposite, sessile, 
lata.h 
tain). (Sy. En. B. 999.) 
Vol. IIL 
A common name for Rhamnus 
ERHINE-BERRY. 
catharticus. ' 
RHINOPETALUM. Included under Fritillaria. 
RHIPIDODENDRON. Included under Aloe. 
RHIPIDOPTERIS. Included under Acrostichum 
(which see). 
RHIPOGONUM (from rhips, a rod, and gonu, a 
knee or joint; in allusion to the jointed stalk). Some- 
times spelt Ripogonum. ORD. Liliacew. A small genus 
(five species) of tall, climbing, greenhouse shrubs, of 
which one is a native of New Zealand, and the rest 
are Australian. Flowers rather small, shortly pedicellate 
or sub-sessile, racemose or spicate; perianth seg- 
ments distinct, equal, or the outer ones shorter. Leaves 
often mostly opposite, sometimes all alternate, three to 
five-nerved, with reticulated veinlets ; petioles not cirrhi- 
ferous. The species are little known in cultivation. 
R. album requires culture similar to Myrsiphyllum 
(which see). 
R. album (white). É white, rather distant, in axillary, simple 
racemes, usually shorter than the leaves. June and July. 
Jr. red when fresh, drying black, $in. in diameter. L irregularly 
— or alternate, elliptic or oblong, —— to ovate or 
Jmost lanceolate, shortly acuminate, narrowed at base, mostly 
— to 4in. long. Main branches often prickly. Australia, 
RHIPSALIS (from rhips, a Willow-branch; re- 
ferring to the flexibility of the branches), Including 
Lepismium and Pfeifera. ORD. Cactew. A genus of 
greenhouse, succulent shrubs, with sub-radicant, elongated, 
terete, or leafy-dilated and crenate stems. Thirty species 
have been described, natives of tropical America, one 
being found in South Africa, and one in Mauritius and 
Ceylon. Flowers lateral, rarely terminal; calyx tube 
not produced above the ovary, with three to many very 
Fic, 365. FLOWERING BRANCH OF RHIPSALIS FUNALIS. 
short, scale-like lobes ; petals six to ten, spreading, ob- 
long; stamens numerous. Berry sub-globose, smooth. 
Leaves scale-like. The species best known in gardens 
are described below. They should be grown in a com- 
post of sandy loam, leaf mould, and brick rubbish. Pro- 
pagation may be effected by cuttings, inserted in rough 
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