634 orchid-growek's manual. 



O. TRILINGUE, Lindl. — A very peculiar plant, still rare in collections, and 

 very much, resembling 0. sermium, to wliicli, indeed, it is nearly allied. The 

 flowers grow in semi-scandent panicles, rather sparsely furnished ; the lateral 

 sepals are unguiculate, connate at the base, elongate lanceolate and undulated, 

 the dorsal one roundish ovate, crisped, the claw auriculate, all of a rich reddish 

 brown; the lip is dagger-shaped, brown, edged with light yellow, with a yellow 

 crest. It should be potted in fibrous peat, and grown in the cool house. — Peru. 



Fig.— Paxton, Fl. Ganh, ii. t.-63 ; Lem. Jard. Fl., t. 217. 



O. TRIQUETRUM, B. Br. — A very pretty little species; -introduced as far 

 back as 1793. It has no pseudobulbs, but produces its leaves in tufts, which 

 are 4 to 6 inches long ; triquetrous spikes ten- to fifteen-flowered ; individual 

 flowers 1 inch across, "rose bordered with white, and deeply stained and spotted 

 with crimson." — Jamaica. 



Fig.— But. Mag., t. 3393. 



O. UNDULATUM, Lindl. — One of the Macranihum section and a strong 

 growing evergreen species, with large ovate pseudobulbs, ribbed and wrinkled 

 when old; the leaves are oblong-lanceolate, strongly ribbed and deep-green; 

 scape 10 feet or more in length, much branched and many-flowered; the 

 flowers measure from 2 to 3 inches across; se^pals large and clawed, bronzy- 

 brown in colour with a central band of pale green ; petals larger than the sepals, 

 clawed, oblong-cordate, emarginate, white, the lower half blotched with purple- 

 mauve, spotted with purple on the upper margin and flushed with irregular 

 feathery streaks of yellow ; lip small triangular ligulate, recurved at the apex 

 and of a uniform rich purple. — Nen: Orenada. 



Fig. — Hmnb., Sonpl.,et Xiinth, i.t. Si {Ciji'tochilum. unAulatum') \ Orchid Alhitm, 

 vlli. t. 368. 



Syn. — Ci/rtoc7Ulum undulatum,. 



O. VARICOSUM, Lindl. — A very beautiful and well-marked species, having 

 ovate oblong sub-tetragonal furrowed pseudobulbs 2 to 4! inches high, ligulate 

 lanceolate bluntish keeled leaves, and stout glaucous panicles 2 to 3 feet long, 

 literally covered with large showy flowers, of which the small oblong acute 

 incurved sepals and reflexed obovate petals are pale dull green banded with 

 dark brown, these being quite eclipsed by the large roundish or transversely 

 reniform obsoletely four-lobed lip, which is flatly expanded and of a clear bright 

 yellow. It flowers during the months of October and November. — Brazil. 



Fig.— Orchid Album, iv. t. 192 ; Lem. Jard. Fl, tt. 206-7 ; Ycitck's Man. Orcli. PI., 

 viii. p. 89. 



O. VARICOSUM ROGERSII, Bchh. f.—Aii exceedingly showy and beautiful 

 free-flowering plant, which is now generally considered to be a variety of 0. 

 varicosum, to which it is evidently closely related. It has oblong ovate furrowed 

 pseudobulbs, which bear two ligulate lanceolate leaves, and from their side a 

 large densely-branched nodding panicle which sometimes bears as many as one 

 hundred and seventy flowers, each measuring about 2^-inches across. The sepals 

 and petals are comparatively small, the lip large, reniform, flat and spreading, 

 deeply four-lobed in front, and rich golden-yellow in colour, with a few bars of 



