1900 SUPPLEMENT—RECENT INTRODUCTIONS, &C. 
451 
ISOLOPHUS. Included under Polygala (which see). 
ISONANDRA. This is in part synonymous with 
Dichopsis (which see). 
ISOSOMA ORCHIDEARUM. See Cattleya Fly. 
ISOTOMA. Inclading Hippobroma. To the species 
described on pp. 202-3, Vol. IL., the following should be 
added : 
I. petrza (rock-loving). 7. white, verging to flesh-colour, lin. 
long, the segments horizontal or reflexed, the three lower ones 
yellowish at their junction. 7. lanceolate or ovate-lanceolate, 
acuminate, unequally laciniate. Stems branched, often lit. 
long, and many-flowered. Flinders Range, Australia. Plant 
highly glabrous. 
; 1 i preter (Syn. Hippobroma brevijlorwm) has also been intro- 
duced, 
ISOTYPUS. Included under Onoseris (which see). 
ITALIAN OAK. See Quercus Esculus. 
hae STARWORT. ‘See Amellus Lych- 
nitis. 
ITHURIEL’S SPEAR. See Triteleia laxa. 
IVESIA UNGUICULATA. A synonym of Poten- 
tilla unguiculata (which see). 
IVIRA. Included under Sterculia (which see). 
IVORY NUT PALM. See Phytelephas macro- 
carpa. 
IVY-LEAVED FERNS. See Hemionitis. 
IVY-LEAVED PELARGONIUM. See Pelar- 
gonium peltatum. 
IVY-LEAVED TOADFLAX. See Linaria Cym- 
balaria. 
IXIA. Thongh not hardy in all parts of England, yet 
so graceful as to form and beantiful as to colour, as well 
as fragrant, are the flowers, that the bulbs should be 
lanted wherever possible. Speaking generally, the species 
Fave been largely ousted by the many garden varieties, 
but a distinct and uncommon species like I. viridiflora, 
with light-green, black-centred flowers (Fig. 469), will 
always hold a foremost place. Ixias when grown ont- 
side are best planted in November, or later, and their 
quarters protected with light litter until early spring. 
They shonld be lifted each season. It is, however, as pot- 
plants that they excel, and five or six bulbs in a 3in. pot 
will produce a pretty effect in the greenhouse. 
To the species, &c., described on pp. 203-4, Vol. IT., 
the following should be added. A number of species 
formerly included here will be found under Geissorhiza, 
Romulea, Sparaxis, Tritonia, and Watsonia. 
I. aristata (pointed). jl. many in a loose spike; perianth tube 
Zin. long, with a whitish limb of the same length. April. 
7. three or four, linear, firm, strongly ribbed, 4in. to 6in. long. 
Stems lft. to 14ft. long. 1800. (B. M. 589.) 
I. a. elegans (elegant). /., perianth tube and limb each 4in. 
long. J. narrower than in the type and not so firm. (R. G. 
46, under name of Wiirthia elegans.) 
I. bicolor (two-coloured). A synonym of Synnotia bicolor. 
I, capillaris is identical with J. scariosa. 
I. paniculata (panicled). /. many, in loose, erect spikes; 
perianth tube 3in. long, the cream-white segments lin. long, 
often tinged with red. May. J. two or three, linear, glabrous, 
6in. to 18in. long. 1774. Syns. J. longiflora (B. M. 256), Tritonia 
longijlora (B. M. 1502). In the variety rochensis the perianth 
tube is much shorter than in the type, and more dilated at 
the throat. Syn. T'ritonia rochensis (B. M. 1503). 
I. scariosa (scarious). The correct name of J. aulica. Syn. 
I. capillaris. 
Varieties. Some of the best are here enumerated : 
AzUREA, deep blue, with paler centre; BEAUTY OF NORFOLK, 
light yellow, black centre; CRATEROIDES, rich scarlet ; DONNA- 
TELLO, brick-red, brown centre; EXCELSIOR, crimson-scarlet ; 
HUMBERT, coppery-rose, black centre; Lapy SLADE, light pink, 
brighter and darker centre; PRa#:sTANS, reddish-crimson; and 
WHITE QUEEN, pure white, crimson centre. 
IXIANTHES (from izos, birdlime, and anthos, a 
flower ; in allusion to the very viscous corolla). Onrp. 
Scrophularinee. A monotypic genus. The species is a 
Ixianthes—continued. 
greenhouse, erect-branched, hairy shrub, with the habit of 
Retzia, and closely allied 1o HMalleria (which see for 
culture). 
I. retzioides (Retzia-like). /l. one to three on short, axillary 
peduncles ; corolla yellow, very viscous, the tube inflated, 
nearly lin. long, the limb bilabiate, five-lobed, spreading. 
1. crowded, 4in, long, 4in. broad, pubescent, serrated at apex. 
h. 7ft. South Africa, 1889. (B. M. 7403.) 
IXIOLIRION. Perianth regular, without any tube 
above the ovary, the segments oblanceolate, ascending, 
acnte; stamens shorter than the segments, to the claws 
of which they are attached. Rootstock a tunicated bulb. 
I. montanum (mountain-loving). According to J. G. Baker, 
this is the correct name of the plant described on p- 204, 
Vol. II., as I. tataricwm, and I. m. tataricum is the proper 
name of I. t. Ledebourii. The variety macranthum has deep 
blue flowers shaded with purple, and Sintenisi has flowers of 
a lighter blue. 
Fic. 469, IXIA VIRIDIFLORA. 
IXORA. To the species described on pp. 204-5, 
Vol. IL., the following varieties, &c., should be added : 
I. alba (white). 1. white, corymbose. 7. lanceolate, acute, 4in. 
to 5in. long, l4in. to 2in. broad. India. (R. G. 1037.) 
I. armeniaca (orange-coloured). fl. pale yellow, flushed with 
salmon. 1890, Habit dwarf and compact. 
I. bella (pretty). . salmon-pink. 1881. 
I. Burbidgei (Burbidge's). l. bright orange-scarlet, in dense, 
axillary and terminal, cymose clusters. 18827. Very similar 
to I. salicifolia in general habit. 
I. conspicua (conspicuous). A handsome form, with large 
trusses of buff-yellow flowers, changing to bright orange. 1886. 
I. eminens (eminent). 7. at first clear buff, afterwards changing 
to light salmon-pink, large. 1885, 
I. eximia (choice). /. buff, changing to salmon-pink, long- 
tubed, disposed in large trusses. 1881. 
I. ferrea (iron-like). jl. pink, few, in axillary or lateral, 
sessile, contracted corymbs; tube 4in. long. ¢, oblong, acute, 
