636 
THE DICTIONARY OF GARDENING, 
RHIZOGLYPHUS ECHINOPUS. The scientific 
name of the well-known ‘‘ Bulb Mite,” so difficult to deal 
with on account of its mode of feeding. See under 
Galanthus. 
ee Oe FRAGILIS. See Vine Fungi, 
Vol. IV. 
RHIZOMORPHA SUBCORTICALIS. 
Fungi, Vol. IV. 
RHIZOPUS NECANS. See Lilium—Pests. 
RHODDON-TREE. See Pyrus Aucuparia. 
RHODODENDRON. Including Vireya. Rhodora 
(which see) is also included herennder by modern 
authorities. To the species and varieties described on 
pp. 292-8, Vol. III., the following shonld be added. One 
or two of them belong to the section Azalea (which 
see), as indicated by the synonyms. In the enumeration 
given are many of the finer hybrids and varieties of garden 
origin. Others will be found at the end. 
R. afghanicum (Afghan). A synonym of R. Collettianuwm. 
R. albescens (whitish). 7. white, scented, large, the upper 
segments marked at the base with sulphur-yellow. J. glabrous, 
the under-surface silvery-white. 1887. Garden hybrid. 
R. Albrechtii (Albrecht’s). #1. purple, smaller than in 
R. Schlippenbachii (to which this species is allied); corolla 
rotate-campanulate, with a very short tube. /. smaller and 
slenderer, deciduous, broadly elliptic or oblong. Branches 
slender, flexuous. Japan. Probably hardy. 
R. Andersoni (Anderson's). . bright carmine. Himalayas. 
A garden name for what is probably a form of R. arboreum. 
R. Apoanum (Apo). /l. red, small, tubular, about 4in. long, 
with spreading lobes ; trusses few-flowered. JZ. narrowly elliptic, 
acute at both ends, green above, rusty beneath. Philippine 
Islands, 1885. A small shrub. (R. G., t. 1196 [1195 in text].) 
R. arboreum. 2. nilagiricwum and R. Windsori are forms of 
this species. 
R. assamicum (Assam). A garden name of R. formosum. 
R. Aucklandii. The correct name is R. Grifithianum. 
R. Batemani (Bateman’s). A form of R. campanulatum. 
R. blandfordizflorum is identical with 2. cinnabarinum. 
R. brachycarpum (short-fruited). 7. pale yellow or cream- 
colour, dotted with green at the base of the upper lobes of 
the corolla, 15in. to 1fin. in diameter, disposed in large, terminal 
clusters. 72. oblong, obtuse, shortly mucronate, clothed beneath 
with rusty-silky pubescence. Japan, 1888. A tall, hardy, wide- 
branching shrub, resembling R. catawbiense in general 
appearance. (G. & F. 1888, p. 292, f. 46.) 
R. calophyllum is a variety of R. Maddeni. 
R. Campbelliz (Lady Campbell's). A 
R. arboreum. 
R. catawbiense. Of this very hardy species there are a 
number of varieties, principally of garden origin. The best are: 
album elegans, white, with yellow spots; delicatissimum, blush- 
rose; Hverestianum, lilac, daintily spotted; fastuosum jlore- 
pleno, lilac, a fine double; and purpureum elegans, rich purple. 
R. ciliicalyx (having a ciliated calyx). jl. pure white when 
fully expanded, 2sin. long, 4in. in diameter, odorous; calyx 
segments rounded, edged with white ciliz ; corolla tube short, 
the lobes crisped. 1. obovate-lanceolate, coriaceous, 3in. to 4in. 
long, shining green above, brownish-scaly beneath. Yunnan, 
1895. A remarkable species, allied to R. Veitchianum. 
R. Collettianum (Major Collett’s).* 1. white, in dense, ter- 
minal corymbs, shortly pedicellate, surrounded with broad, 
ciliated seales ; sepals five, obtuse; corolla nearly lin. long, 
funnel-shaped; stamens ten. May. J. 2in. to 3in. long, very 
coriaceous, elliptic-oblong or -lanceolate, acute at both ends, 
opaque above, lepidote-scaly beneath ; petioles din. to 4in. long. 
Branchlets furfuraceous-pubescent. h. 8ft. to 10ft. Afghanistan. 
Hardy. (B. M. 7019; G. C. 1888, iv., p. 297.) Syn. R. afyhanicum 
(of gardens). 
R. Curtisii (Curtis’). A synonym of R. multicolor. 
R. dilatatum (dilated).* . twin; corolla bright rose-colour, 
fading to white towards the base within, deeply two-lipped ; 
inflorescence terminal, clothed with glabrous bracts. April. 
7. ternate, sin. to 2in. long, rhombic-ovate, bright green 
clouded with blood-red above, very pale beneath. Japan, 
1885. A small, beautiful, hardy, much-branched shrub. (B. M. 
7681.) Syn. Azalea dilatata (of gardens). 
R. Falconeri-niveum (hybrid). A garden hybrid between the 
two species indicated in the name. 1896. 
R. ferrugineum. Of this species atrococcinewm (dark scarlet), 
erectum (erect), hybridum (hybrid), myrtifolium (Myrtle-leaved), 
and variegatum (variegated) are desirable varieties. 
R. flavum (yellow). See Azalea pontica. 
R. Fordii (Ford’s).* l. white, about 2in. in diameter, disposed 
in few-flowered corymbs. 7. dark green, obovate, cuneate at 
See Vine 
synonym of 
- Rhododendron—continued. 
base, coriaceous, 3in. long. China, 1894. Allied to R. Fortunet 
and R. brachyearpum. 
R. formosum. A&. Gibsonii and R. Johnstoni are merely forms 
of this species. 
R. Forsterianum (Forster's). A garden 
R. Veitchianum and R. Edgeworthii. 1882. 
R. Gibsonii (Gibson’s). A form of R. formosum. 
R. grande roseum (rosy).* jl. of a lively rose-colour, with 
darker veins on the lobes, and obscure spots on the tube 
within. Sikkim, 1887. (B. M. 6948.) 
R. graveolens (strongly-scented).* /. pure white, fragrant. A 
hybrid between 
dwarf and free-flowering hybrid between R. formosum and 
R. Sesterianum. 
R. Griffithianum is the correct name of R. Aucklandit 
(R. G, 1866, t. 517; R. TH. 1855, t. 5). 
R. Halopeanum (Halopé’s). A garden hybrid between 
Ae Srabenvanaien and It. avboreum. 1896. (R. H. 1896, pp. 359, 
-) 
R. Harrisii (Harris's).* /l. deep rose-crimson, with a few dark 
spots on the upper segments, in a dense head as in 
KR. arboreum. Autumn. J. oblong-ovate, 5in. long, pale 
beneath; petioles lin. long. A hybrid between R. arboreum 
and R&R. Thomsonii. Hardy. 
R. hirsutum album (white). A white-flowered form, of 
compact habit. 
R. indico-javanicum (hybrid). A garden hybrid between 
Azalea indica and R. javanicum. 1889. 
R. intermedium (intermediate). A natural hybrid between 
R. ferrugineum and R. hirsutum. 
R. irroratum (bedewed). jl. many, in terminal heads, very 
shortly pedicellate; corolla lin. long, the tube white, with 
faint spots, the five short, recurved lobes suffused with rose. 
September. 2. spreading and deflexed, 3in. to 4in. long, oblong 
to oblanceolate, with recurved margins. hk. 3ft. or more. 
China, 1890. A glabrous shrub, (B. M. 7361.) 
R. jasminifiorum carminatum (carmine). jl. rich carmine, 
slightly toned with orange-scarlet around the base of the 
limb, the tube paler externally. 1886. A hybrid between 
Rh. jasminiforum and R. javanicuin. 
R. j. roseum (rosy). jl. soft carmine-rose, twice as many in 
an umbel as in the type. 1894. 
R. javanicum tubiflorum (tube-flowered). fl. orange-red; 
corolla tube elongated, June. ¢. smaller than in the type, 
the midrib impressed above. Sumatra and Java, 1885. 
(B. M. 6850.) 
R. Johnstoni (Johnston's). A form of R. formosuin. 
R. Keiskei (Keiske’s). /l. rose-purple, about lin. in diameter, 
disposed in loose corymbs. @. ovate, 3in. long. Japan, 1895, 
A hardy species, allied to 2 dauricwn, but dwarfer in habit. 
Fic, 647. RHODODENDRON KEWENSE. 
R. kewense (Kew).* 7. of a pale flesh-colour, not so large 
as those of R. Grijithianum (between which and I. Hookert 
this is a hybrid), but more numerous in the truss. Kew, 1874. 
A valuable and quite hardy plant, flowering freely near towns. 
See Fig. 647. 
R. Kingianum (King’s). jl. blood-red, disposed in a dense head. 
Manipur, 1899. A new species, closely allied to M. arboreum, 
from which it differs in having the leaves crowded on the 
stem, bullate, with recurved margins. (G. C. 1899, xxvi., p. 506, 
f. 102.) 
R. Kochii (Koch's). #. white, 1fin. long, tubular, with a 
campanulate limb, something like those of R. jasminiflorum, 
disposed in loose trusses. J. petiolate, oblong-lanceolate, 
