26 



ONCroiUM. 



acute, connate to about half their lengtli ; lip clawed, the blade spreading, 



orbicular or broadly cordate, emarginate ; crest bi-lamellate. Column 



wings tooth-like, ascending. 



Oncidiura concolor, Hook. Bot. Mag. t. 3752 (1840). Lindl. Fol. Orch. Oncid. 

 No. 65 (1855). The Garden, XIII. (1878), t. 111. Williams' Orch. Alb. I. t. 1. 

 Rev. hort. 1881, \\ 30. Illus. hort. a. 3, t. 487. Sander's Reichenhachia I. t. 30. 

 Lindenia V. t. 205. On. unguiculatum, Klotzsch, ex. Lindl. Fol. Orch. Cyrtochilum 

 citrinum, Bot. Mag. t. 4454 (1849). 



Discovered by Gardner on the Organ Mountains in 1837, and sent 



by him to the Woburn collection, where it flowered in 1840; it wa3 



subsequently gathered by Sellow and Glaziou, both of whom sent 



Oncidium concolor. 



herbarium specimens to Europe, but it continued to be very rare 

 in European gardens till 1876, in which year we received a con- 

 signment of plants from a correspondent at Rio de Janeiro. The 

 drooping racemes of self-coloured flowers of the purest yellow render 

 this species one of the most admired in the genus ; its flowering 

 season is April and May. 



On. cornigerum. 



Pseudo-bulbs sub-cylindric, compressed, 2 — 3 inches long, monophyllous. 

 Leaves elliptic-oblong, sub-acute, 3 — 5 or more inches long. Scapes 

 slender, arching or pendulous, 15 — 24 inches long, pale green dotted 

 with dull crimson, with an acute, striated, closely appressed bract at 

 each joint, much branched along the distal half. Flowers somewhat 

 crowded, about f inch in diameter ; sepals and petals yellow spotted 

 and barred with red-brown, the dorsal sepal obovate-oblong, concave, 

 bent forward over the column, the lateral sepals oblong, connate to 

 beyond the middle ; petals clawed, obovate, obtuse ; lip panduriform, 



