132 iONOl>sis. 



Cultural Note. — We have never seen any forms in cultivation besides 

 the two here described. These are usually attached to small blocks or 

 rafts, with some sphagnum around their roots and suspended from the 

 roof of the intermediate house. Like the Oncids of the section 

 Equitantia which they much resemble in habit and aspect, the 

 lonopses are short lived in the glass-houses of Europe ; they have a 

 tendency to produce flowers out of proportion to the strength of the 

 plants, and in order to prolong their life as much as possible, it is 

 advisable to apply a check such as is often ajiplied to species of 

 Phalsenopsis, by occasionally removing the incipient inflorescence. 



lonopsis paniculata. 



Leaves linear-lanceolate, acute, 4 — 6 inches long, channelled on the 

 face, keeled behind. Peduncles slender, jjanicled, 15 — 20 or more inches 

 long. Flowers numerous, less than an inch across vertically, on slender 

 pedicels sheathed at the base by a minute scale-like bract ; sepals and 

 petals white, narrowly oblong, acute, the petals a little the broadest ; 

 lip clawed, the blade large in proportion to the other segments, rounded 

 two-lobed, white with a purple spot in front of the small bipartite 

 yellow callus. 



lonopsis paniculata, Lindl. in Bot. Reg. sub. t. 1904 (1836). Id. Fol. Orch. 

 lonopsis, No. 9. Bot. Mag. t. 5541. Van Houtte's Fl. des Serves, XXII. t. 2333. 



Originally discovered by Descourtilz at the beginning of the 



present century in the primeval forests of Sao Paulo_, in southern 



Brazil. It remained unknown to horticulture till it was imported 



by Messrs. Low and Co., in whose Clapton nursery it flowered for 



the first time in this country in the autumn of 1864. 



I. utricularioides. 



Leaves linear, acuiuinatc, curved, 3- -4 inches long, green when first 

 developed, changing with age to dull vinous jnu'iile. Peduncles slender, 

 dull purple, 9 — 12 inches long, panicled al)0ve. Flowers white, some- 

 times with a small rose-purple spot at the base of the lip, | inch in 

 diameter, on slender pale purple pedicels ; sepals and petals collectively 

 forming a funnel enclosing the column, the sepals lanceolate, the petals 

 oblong, obtuse, longer and broader than the sepals ; lip broadly clawed, 

 transversely roundish oblong with a deep sinus in the anterior margin, 

 produced at the base into a short truncate spur, in front of which are 

 two small tubercles, 



lonopsis utricularioides, Lindl. in Collect. Bot. t. 39 (1821—25). Id. Gen. et 

 Sp. Orch. p. 194. Id. Fol. Orch. lonopsis, No. 5. I. tenera, Lindl. in Bot. Reg. 

 t. 1904 (1836). 



This is the best^ and next to the type the longest known of 



