ACACALLIS. 69 



Flowers about an inch in diameter ; sepals and petals ovate-oblong 



acute, the sepals white, but sometimes coloured like the petals, the 



petals violet-blue, white at the tip ; lip broadly pandurate, the basal 



lobes erect, the front lobe spreading, white streaked with violet-purple ; 



crest fleshy, obscurely bilobed, white spotted with violet-purple. Column 



terete, very short with two narrow wings. 



Aganisia ionoptera, Nicholson, Diet, of Gard. I. p. 35 (1885). Lindenia, VI. t. 

 287. Bot. Mag. t. 7270. Koellensteinia ionoptera, Rchb. in Gard. Chron. 1871. p. 

 1451. 



An attractive species first discovered by Gustav Wallis in Peru 



or Ecuador and sent by him to Messrs. Linden. It lias been 



recently re-imported but its precise habitat has not been divulged. 



It was originally described by Reichenbach under the name of 



Koellensteinia ionoptera. 



A. pulchella. 



Rhizome creeping, slender, closely invested with imbricating brown 



scales. Pseudo-bulbs distant, ovoid, scarcely an inch long, monophyllous. 



Leaves oval-oblong, acute, 4 — 5 inches long, narrowed below into a 



slender petiole half as long as the blade. Racemes erect, as long as 



the leaves, 4 — 6 flowered. Flowers more than an inch in diameter ; 



sepals and petals sub-equal, ovate-oblong, acute, white ; lip bipartite, 



the hypochile sub-rotund, concave, spotted with red ; the epichile much 



larger, broadly ovate, entire, with a yellow disk and white margin, 



and with a yellow glandular crest at its base. Column semi-terete 



with two incurved wings at the apex. 



Aganisia pulchella, Lindl. in Bot, Reg. 1839, misc. No. 65 ; and 1840, t. 32. 

 Rchb. in Walp. Ann. VI. p. 505. 



This is the species on which the genus was founded but it is now 



rarely seen in other than botanic gardens^ although rightly characterised 



by Lindley as a very pretty orchid. It was originally sent by 



Mr. Brotherton to Messrs. Loddiges in 1839 from British Guiana, 



where it was shortly afterwards detected by the brothers Schomburgk 



growing on the stems and branches of trees along tbe banks of 



the river Demerara. 



ACACALLIS. 



Lindl. Fol. Orch. 1853. Benth. et Hook. Gen. Plant. IIL p. 544. 

 A monotypic genus founded by Lindley on a species discovered 

 by Dr. Spruce near Manaos in northern Brazil. Reichenbach after- 

 wards referred it to Aganisia, but Bentham restored it to Acacallis 

 on the ground that the curious appendage to the labellum and the 



