Isoloma 



( 451 ) 



Ixia 



ISOLOMA. 



A large genus of stove herbs (ord. Gesneraceje) 

 for the most, part with showy flowers. Few of the 

 species are cultivated, however, and there is much 

 Donfusion in ;irclens between them and the 

 Achiincnos and Gesneras. Cuttings of the tips of 

 the young shoots root readily enough if dibbled 

 into sandy soil and kept in a close, warm frame 

 with bottom heat, for a couple of weeks. After- 

 wards they may be potted on, first into 3", then 

 into 4i" pots, which are large enough for flowering. 

 Soil, equal parts of fibrous loam and leaf soil, with 

 one. sixth of sharp sand. 



Principal Species : 



hondc'ise, various, ye!., about 1" long (ayn. 

 Gesnera bonilensis of Jiotanical Magazine 4217). 

 Plants may be had in flower all through the year. 



Other Species : 



(//. Achimenes ocell- 

 ata of Botanical Maua- 

 zine 4359). 



pictum, 3', sum., aut., 

 sc., yel. (xi/n. Gesnera 

 pictaof Jiotanical Mm/a- 

 zitie 4431). 



schiedeanura, li', Nov., 

 sc. (syn. Gesnera schie- 

 deana of Botanical 

 Magazine 4\?>1). 



Seemanm'i, 2', Oct., red 



<ioppeanum, 2' to 3', sum., 

 or., red (/. Gesuera 

 elongate Tar. of Uolani- 



fiil Jliii/nzine 'Al'lb). 

 <ligit:ilinoniin, ro., pur., 



wh. throat. 

 firmans, pvir., yel. (,s7/^,y. 



Moussonia elcgans and 



formosal . 

 hyriocyrtirlorum, or., red 



(XI/H. Gloxinia hypo- 



cyrtiflora of JSotuntml 



. 



Liudeni, wh., 

 banded vio. 



throat 



(.11/11. Gesnera Seeman- 

 nii of Botanical Maya* 



tatiieaf Magazine 3815). 

 ocellatum, win., red 



. 



triflorum, H' to 2', sum., 

 yel. (tun. Gesnera tri- 

 of Jiotanical Jfiiya- 



sceptrum, 3' to 4', Jy., yel. 

 br. (xt/n. Digitalis scep- 

 trum). 



. 



molle, win., red (syn. 

 Gesnera mollis of Jio- 



flora o: 

 sine 4342). 



ISOMERIS. 



Only one species, arborea (ord. Capparideaj), 

 and it is of no garden value, beinsr onlv grown as 

 a curiosity. 



ISOPLEXIS (syn. CALLIANASSA). 



Two species of pretty greenhouse evergreen 

 shrubs (ord. Scropholarineffl). Increase is by 

 cnttingg of the semi-matured shoots in summer, 

 dibbled into sand under a bell-glass. Soil, loam 

 and leaf mould in equal parts, with sand. 



Only Species : 

 canarieusis, 4' to G', Je., 



yel, (syn. Digitalis ca- 



narieusis) . 



ISOPOGON. 



Green'iouse evergreen shrubs (ord. Proteace) 

 very seldom seen in cultivation. 



ISOPYRUM. 



Dwarf perennial herbs (ord. Kanunculacese) of 

 slender, elegant habit. The most important species 

 is thalictroides, whose foliage looks not unlike a 

 Maidenhair Fern. Clumps of it are very effective 

 in nooks of the rockery, or the herbaceous border. 

 I m Tease is by seeds, sown when ripe, or by root 

 division in the autumn. Any ordinarily good soil 

 "will do. 



Principal Species : 



thalictroides, 0", spr., wh., small, root creeping. 



Isoloma (of J. Smith, see Lindsay a). 

 Isulopltns (see Pub/gala). 

 Isonundra Gntta (see IKchopiis). 



ISOTOMA, 



Obscure little stove and greenhouse herbaceous 

 perennials (ord. Campanulooecs) seldom or never 

 seen in gardens. 



ISOTROPIS. 



Greenhouse evergreen shrubs (r.r:l. Legnminosse), 

 propagated by cuttings of the young wood in 

 sandy peat beneath a bell-glass. Soil, one part 

 fibrous loam, three parts fibrous peat, with pieces 

 of charcoal and coarse .-and. 



Principal Species : 



striata, 1', sum., or. (syn. Chorizema spartioides). 



ITEA. 



Hardy deciduous and evergreen shrubs (ord. Saxi- 

 frageas). Propagated by seeds sown in spring, or 

 by suckers. Soil, peat and sand. A moist position 

 is best. 



Principal Species : 



Cyrilla(.srcCyrillaracomi- spinosa (. Bursaria 

 flora). spinosa). 



virginica, 6', Jy., wh. 



IVY (see HEDERA). 



IXANTHUS. 



Herbaceous biennials (ord. Gentianene), requiring 

 greenhouse culture. Propagation, from seeds sown 

 in spring. Soil, any fertile mixture of peat and 

 sand. 



Only Specieo : 



viscosus, 2', Je., wh., yel. (sjn. Exacum vis- 

 cosuin). 



IXIA. 



Description. Half - hardy Cape bulbs (ord. 

 IrideEe) that produce long spikes of verv beautiful 

 flowers, and bear marked resemblances tu Babianas, 

 Sparaxises, and Tritonias. 



Propagation. 15y seeds, which are best sown 

 in shallow pans of sandy peat, in spring. Also by 

 offsets, of which considerable numbers are pro- 

 duced ; these quickly form flowering plants. 



Soil. Three parts mellow loam, one part leaf 

 mould, and coarse sand. 



Other Cultural Points. Though Ixias are not 

 strictly hardy, they will be found to succeed 

 admirably on a warm border which is well drained. 

 The soil should be somewhat light in character, 

 and the bulbs must be planted deeply and covered 

 with some material in the winter that will throw- 

 off heavy rains. Whether grown in pots or out of 

 doors it is essential that the foliage ripen off 

 naturally, so as to plump up the bulbs for the 

 following season's flowering. If it is necessary t 

 remove them from the soil immediately after 

 flowering, lay them out in some convenient place 

 where the leafage will die slowly, and not where 

 it will be almost instantly dried up. The best time 



Isotypus (see Unoser'a). 



Italian Oak (xcr f/"r/v//.< .Ksculvi). 



Ithnricrs Spear (.wr Tritelela laxa). 



Jvcsia nnguiculata (see Potentilla nnyuicnlala). 



Iirira (see Stcrcitlia). 



frory ffut Palm (see I'kytclephas macrocarjia). 



fvy-leaccd FCTII (see lli-tnionitis). 



Ivij-leared 1'clanjoniuin (see J'clargtiniiiin pel- 



tatitm). 



Iry-learcd Toadjlnr (sec J.inaria C'ymbalaria), 

 Ixauclieims (sec Layenophora). 



