ONCIDIUM. 



23 



growing upon oaks at 8_,000 feet elevation, and introduced by him to 

 the gardens of Senator Jenisch and Consul Schiller, near Hamburgh, 

 where it flowered for the first time in Europe in 1852. At the 

 altitude at which this Oncid grows Warscewicz observed that the 

 temperature frequently falls during the night to 4°— 7° C. (40°— 45° F.), 

 a circumstance which suggests cool treatment in the glass-houses 



Oncidiura clieirophoruin. 

 a, natural size ; b. enlarged. 



of Europe. The specific name " Wallflower-bearing " refers to the 

 resemblance of the colour of the flowers to that of species of 

 Cheiranthus. Oncidiiim cheirophorum is well known as one of the 

 prettiest of the small-flowered Oncids, and one of the most tractable 

 under cultivation. 



On. chrysodipterum. 



Pseudo-bulbs oblong, compressed, 3 inches long, mono-diphyllous. 

 Leaves broadly strap-shaped, sub-acuminate, cuneate at base, 15 — 20 

 inches long. Scape flexuose, 7 — 9 or even more feet long, with short 

 branches at irregular intervals, each bearing 3 — 5 or more flowers. 

 Flowers 3 inches across vertically; sepals with a semi-terete claw grooved 

 on the face and slightly reflexcd, the dorsal sepal cordate-orbicular, 

 undulate at the margin, bright chestnut-brown with a narrow yellow 

 border ; the lateral two divergent, broadly ovate, sub-acute, keeled behind, 

 wholly brown; petals much smaller with a shorter claw, ovate-lanceolate, 

 incurved and strongly undulated at the margin, bright gamboge-yellow 

 spotted with brown on the basal half only ; lip linear, reflexcd, yellow 

 stained with brown in front of the crest, with two triangular deflexed 



