268 ORCHIDS 



Ipsea. 



India and Africa, and have long, narro\\', plicate lca\es, 

 and tlie shcatlicd scajic of Pacliystoiiia (under which genus 

 JpsC(X was includerl b\' I-Sentham and Hooker), but are 

 distinctly pseudo-bulbous, with a fe\v large, highly-coloured 

 flowers. 



/. spccidsa, the only species in cultivation, is best suited 

 "hen grown in well-drained pans or shallow baskets 

 containing equal ]jortions of fibrous peat, leaf soil, and 

 sphagnum, with a liberal sprinkling of rough sand or 

 bi'oken crocks. It requires a liberal suppjly of root 

 moisture \\'hile in an active state ; as soon as growth has 

 matured it requires to be suspended in a light position of 

 tlic house. 



I. speciosa (LiiidL). — Flowers yellow, showy, usually solitary, 

 sometimes twin, very sweetly scented ; sepals nearly 2in. long, 

 oljlong, lateral ones connate with the base of the column ; petals 

 slightly narrower, obtuse ; middle segment of the lip oblong, 

 obtuse, lateral ones broad, acute; scape purple, ift. to i-^ft. high. 

 Leaves twin, sheathing at the base, narrow, ensiform. Roots 

 succulent. Spring. Ceylon. Syn. Pac/iYsfonia speciosuiu. (Fig. 82 ; 

 E. M., t. 5701. j 



ISABELIA. 



A monoty]Dic genus of the tribe I'd/idrcp, and founded b}- 

 Rodriguez. The generic name is a complimentary one to 

 II. I. H. Isabel, Comtesse d'Eu, a great patroness of Horticul- 

 ture. The species /. virgiitalis has solitary, white flowers, 

 and \'ery peculiar creeping, single-leaved, pseudo-bulbs. 

 It is an epiphyte and a nati\"e of Brazil. Warm inter- 

 mediate-house treatment is called for. 



ISOCHILUS. 



Though four or fi\-e species of the above-named genus 

 of the tribe Epidcndrciv have been described, but one, 

 /. linearis, is met with. Robert Brown established the 

 genus, which derives its name from isos, equal, and clicilos, 

 a lip ; in allusion to the shape of the labellum. The 

 species are nati\-es of the West Indies and tropical 

 America. Flowers rose or red, in one row, in spike-like 

 racemes, small or medium ; lip free from the column. 



