76 BtPRENARlA. 



tlirougli their correspondent Mr. Warre, and occasionally imported 

 since with other south Brazilian orchids. It is the species on which 

 the genus was founded^ and with the exception of Bifrenaria 

 HarrisonicB, the first Bifrenaria introduced into cultiv^ation. Its 

 chief attraction is the pleasant fragrance of its flowers. 



B. aurantiaca. 



Pseudo-bulbs ovoid, ribbed and spotted, 1 — 1^ inch long, monophyllous. 



Leaves 5 — 8 inches long, oval-oblong, acute, narrowed below into a 



short channelled petiole. Scapes longer than the leaves, racemed along 



the distal half, few - flowered. Flowers an inch in diameter, deep 



yellow spotted with orange ; sepals and petals similar and sub-equal, 



oblong, undulate, sub-acute ; lip clawed, three-lobed, the side lobes 



roimdish oblong, deflexed ; the front lobe somewhat fan-shaped with a 



deep cleft at the apex and with a truncate crest at the base. 



Column semi -terete, pubescent. 



Bifrenaria aurantiaca, Lindl. in Bot. Reg. t. 1875 (1836), and 18i3, misc. p. 52. 

 Bot. Mag. t. 3597. Kchb. in Walp. Ann. VI. p. 550. 



A native of British Guiana, whence it was first introduced in 



1835, and where it was afterwards detected by the brothers 



Schomburgk along the banks of the Essequibo and Pomeroon rivers, 



growing on the stems and branches of trees. 



B. Harrisonise. 



Pseudo-bul]).-; broadly ovoid, obscurely four-angled, 2 — 3 inches long, 



monophyllous. Leaves elliptic-oblong, acute, 9 — 12 inches long, 3 — 4 



inches broad, leathery and dark green. Scapes shorter than the leaves, 



usually two from the base of the latest-formed pseudo-bulbs, sheathed 



with a pale brown, acute bract, about an inch long at each joint, and 



a larger one at the base of the ovary, 1 — 2 flowered. Flowers fleshy, 



about 3 inches across the lateral sepals ; sepals and petals spreading, 



oval-oblong, obtuse, ivory-white ; the dorsal sepal concave, the lateral 



two a Httle larger, slightly falcate, adnate to the produced foot of the 



coliunn, and forming with it and the base of the lip a funnel-shaped 



obtuse spur ; lip three-lobed, vinous purple with darker purple veins ; 



the side lobes oblong, incurved, the intermediate lobe sub-quadrate, 



emarginate, hairy above, the margins much notched ; crest very hairy, 



orange-yellow. Column clavate, arched, white. 



Bifrenaria Harrisonise, Rchb. in Bonpl. III. p. 217 (1855). id. Xcn. Orch. 1. p. 

 224, t. 94. tig. 2. Id. in Walp. Ann. VI. p. 547. Limienia, V. t. 239. Maxillaria 

 Harrisonise, Lindl. in Bot. Reg. t. 897 (1825). Id. Gen. et Sp. Orch. p. 148. 

 Bot. Mag. t. 2927- Paxt. Fl. Gard. IT. p. 196 (grandifiora). Dendrobium 

 Harrisoniee, Hook. Exot. Fl. t. 120 (1825). Lycaste Harrisonire, Williams' Orch. 

 Manual, p. 579. 



SUb-vars. — alha (Bot. Reg. 1841, misc. No. 68), sepals and petals cream- 



