450 THE DICTIONARY 
OF GARDENING, 
Iris—continued. | 
12in. long, dark green. Palestine, 1885. (B. M. 6942.) A pretty 
species. 
I. Viviani (Vivian's). A sub-variety of J. Yiphium. 
I. xiphioides. English Iris. Well-known garden 
are: BLANCHEFLEUR, white, tinged rose; GRAAF BE 
magenta, flaked white, crimson spotted; KING OF THE BLUES; 
LA CHARMANTE, layender-blue and white, margined soft blue; 
and LILACINA, deep lavender, violet spotted. 
I, x. argentea (silvery). A garden variety having white falls 
blotched with purple. 1891. (R. H. 1891, p. 36.) 
Fic. 468. SpanisH Iris AVALANCHE. 
I. Xiphium (Xiphion). The correct name of the well-known 
Spanish Ivis of our gardens, J. vulgaris. 
I. X. lusitanica (Portuguese). A variety with yellow flowers. 
(B. M. 679, under name of J. lusitanica.) 
I, X. 1. Viviani (Vivian's). #1. yellow, large, wax-like; falls 
sulphur-yellow, with transparent veins and a large, golden 
blotch. Portugal, 1889. 
The following garden varieties of J. Xiphium are amongst the 
best grown: AVALANCHE (Fig. 468), white, blotched yellow, 
fringed; CALIFORNIA, deep yellow, with orange blotch; 
CATHERINA, deep blue, white, and orange ; GOLDEN KING, deep 
yellow ; PRINCESS IDA, white and primrose, blotched orange ; 
SNOWBALL, pure white, blotched deep yellow; THE Moor, 
reddish-purple and brown; and THUNDERBOLT, bronzy-purple 
and warm brown, blotched deep orange. 
IRONBARK. ‘See Eucalyptus leucoxylon. 
IRON SHRUB. See Sauvagesia erecta. 
IROUCANA. Included under Casearia (which see). 
ISABELIA (named in honour of H.I.H. Isabel, 
Comtesse d’Eu, a great patroness of science and _ horti- 
culture). Orp. Orchidee. A monotypie genus. - The 
species is a very peculiar, creeping, pseudo-bulbons, one- 
leaved, epiphytal Orchid, allied to Maxillaria (which see 
for culture). 
I. virginalis (virgin-white). /. white, solitary; sepals sub- 
equal, the lower ones corinate at base and produced ina short 
spur; petals narrower ; lip entire, somewhat obcordate. April. 
l. linear-aciculate, long, acute. Pseudo-bulbs small, covered 
with reticulated, fibrous bracts. Brazil. 
ISABELLA GRAPE. See Vitis Labrusca. 
ISATIS. To the species described on p. 200, Vol. IL., 
the following should be added : 
I. Boissieriana (Boissier’s). //. yellow ; inflorescence racemose- 
corymbose. /r., silicules heteromorphous, pubescent. /., upper 
ones oblong, acute, cordate-sagittate at base, entire; lower 
ones cuneate-oblong, acute, sinuate-toothed. Ah. about 1ft. 
Turkestan, 1876. Hardy annual. 
ISCHARUM. To the species described on p. 201, 
Vol. II., the following should be added: 
I. eximium (choice). /. having the spathe dark purple on the 
upper side, and green spotted with red on the under-surface. 
l. broad, simple. Western Cilicia, 1898. Hardy. (G. C. 1898, 
xxiii., p. 126, f. 49.) 
ISCHNASPIS FILIFORMIS. A species of Thread 
Scale found upon Palms in this country, but very de- 
structive abroad to coffee plantations. See Scale Insects. 
ISCHNIA. A synonym of Tamonea (which see). 
ISCHNOSIPHON (from ischnos, thin, and siphon, a 
tube ; in allusion to the slender, cylindrical corolla tube). 
Syn. Hymenocharis. Orv. Scitaminer. A genus embracing 
about sixteen species of mostly tall, stove herbs, closely 
allied to Maranta, natives of tropical America. I. Arowma, 
I. Parkeri (Syn. Phrynium Parkeri), and I. smaragdinus 
(I. H. 1870, t. 16) are grown at Kew, but none of the 
species are in general cultivation. 
ISCHYROLEPIS. A ceynonym of Restio (which 
see). 
ISCUROCHLOA. A synonym of Bambusa (which 
see}. 
ISOETES (from isos, equal, and etos, the year; in 
allusion to the evergreen nature of the plants). Quillwort. 
Orv. Selaginellaceey. A genus embracing about fifty 
species of broadly-distributed, stove, greenhouse, or hardy, 
stemless perennials, aquatic or growing in damp gronnd, 
with a two- or three-lobed rootstock of firm texture, 
emitting dense tufts of root-fibres from its under-side. 
Leaves without any lamina, forming a dense rosette, 
subulate, rounded at back, dilated at base. Sporangia 
not arranged in spikes, but embedded in the base of the 
leaves ; macrospores yery numerous. The genns is repre- 
sented in Britain by L. lacustris and its Irish variety 
Morei (J. B. 1878, p. 353, t. 199). I. Druriwi is grown 
at Kew. 
ISOLOMA. Including Moussonia and Sciadocalyx. 
Tydza (which see) is also included hereunder by Bentham 
and Hooker. To the species described on p. 201, Vol. II., 
the following should be added : 
I. elegans (elegant). /l. purple, the throat and limb yellowish 
within, purple-spotted; corolla l4in. long, slightly incurved; 
umbels three- to four-flowered. J. opposite, petiolate, ovate- 
oblong, acuminate, crenate-toothed. Guatemala. Plant densely 
and softly villous-tomentose, often reddish. SyYNS. Moussonia 
elegans (F. d. S. v., t. 489; L. & P. F. G. i, p. 128, f. 88), 
M. formosa (R. G. 1854, t. 101). 
I. hirsutum (hairy). /l. orange-scarlet, with the upper lip 
scarlet and the lower one and the throat spotted with scarlet, 
tubular, abundantly produced. Origin not recorded, 1881. 
Plant of free growth. 
I. ignoratum (unknown). 7. cinnabar-red, villous-hairy outside, 
part of the limb slightly spotted with yellow; peduncles one- 
flowered, axillary, solitary or twin. J. ternate, oblong, slightly 
acuminate, narrowed to the petioles, deeply and simply crenate. 
Stem erect, fleshy, silky-pilose. Central America. SYNS. 
Gesnera ignorata, Kehleria ignorata. 
I. jaliscanum (Jalisco). jf. borne in umbels; corolla scarlet, 
lin. long. J. oblong-lanceolate, lin. to 3in. long. Stem de- 
cumbent, pubescent. Mexico, 1896. 
I. longifolium (long-leaved).’ jl. orange-red, disposed in a 
terminal raceme; limb regular; peduncles whorled in the 
upper axils, much longer than the petioles. J. opposite or 
almost alternate, crenulate-toothed, much narrowed at both 
eo Guatemala, 1840. Syn. Gesnera longifolia (Gn. 1888, i., 
644). 
I. tubiflorum (tube-flowered). 7. yellow, tinged with red, 
rough with hairs; peduncles axillary, much shorter than the 
petioles. J. large, ovate, acuminate, slightly toothed, reti- 
culated, strongly veined and pale beneath. Colombia, 1846. 
Syn. Gesnera tubiflora. 
I. Luciani (SYN. Sciadocalya Luciani, I. H. 1874, p. 151, 
f. 182), J. rupestre (SYN. Kehleria rupestris), and I. Warscewiczii 
(Syn. Sciadocalyx Warscewiczii, B. M. 4843) have also been 
introduced. 
