86 ONCIDltJM. 



occupation by tlie Spaniards in tlie sixteentli century, by wbicb all 

 the most conspicuous native orcliids have been associated with their 

 religious obsei'vances. 



On. triquetrum. 



Pseuilo-l)ul1« none. Leaves in tufts of 3 — 4 or more, linear, acute, 



3 — 5 inches long, fleshy, triquetrous, the angles very acute, channelled 



on one side. Scapes slender, longer than the leaves, terminating in a 



10 — 15 flowered raceme. Flowers an inch across vertically; sepals 



broadly lanceolate, acute, purplish green, the lateral two connate and 



together equal to the dorsal one, hi-dentate at the tip ; petals ovate, 



imdulate, white tinged -N^dth pale green and spotted with purple ; lip 



cordate-ovate with two rounded basal auricles, white spotted and streaked 



with purple ; crest small, sub-globose, orange-yellow. Column wings 



oblong Avith the outer margin crenulate. 



Oncidiura triquetrum, R. Br. in Ait. Hort. Kew, ed. 2, vol. V. p. 216 (1813—15). 

 Lindl. Gen. et Sp. Oreh. p. 205 (1832). Id. Fol. Orch. Oncid. No. 30. Bot. Mag. 

 t. 3393. 



One of the prettiest of the equitant Oncids, although like its 



congeners and from the same cause it is but rarely seen in British 



gardens. It was originally introduced to the Royal Gardens at Kew 



by Admiral Bligh from St. Ann's, in Jamaica, in 1793; and again from 



the same island, to which so far as at present known it is confined, 



by Mr. Horsfall, of Liverpool, about 1833, by whom plants were 



distributed among the orchid collections at Wentworth, Chatsworth, 



etc. It is very near Oncidium pulchellum, from which it is easily 



distinguished by its very difTerently-shaped labellum. 



On. trulliferum. 



Pseudo-bidbs oblong, compressed, much elongated, 4 — 7 inches long, 

 di-triphyUous, broA\Tiish green. Leaves variable in size, narrowly oblong 

 or lanceolate-oblong, narrowed at the base, sub-acute, 6-9 or more inches 

 long, 1 — 2 inches broad. Scapes about 2 feet long, loosely panicled 

 along the distal third. Flowers nearly an inch across vertically, on 

 short, slender pedicels, sheathed at the base by a minute auricular 

 bract; sepals and petals bright yellow barred -with red-brown, oval- 

 oblong, obtuse, the dorsal sepal the shortest and concave, the lateral 

 two free and divergent ; lip bright yeUow, broadly clawed with two 

 roimded basal auricles and a trowel-shaped blade with serrulate margin ; 

 crest primarily three-lobed, each lobe much warted and toothed, the 

 front lobe somewhat saddle-shaped, yellow, the posterior two divergent 

 and spotted with red-brown. Column -wings narrow; anther beaked. 



Oncidiura trulliferum, Lindl. in Bot. Reg. 1839, t. 59. Id. Fol. Orcli. Oncid, 

 No. 190. Kegel's Gartenfi. 1877, t. 922. 



