ONTIDIUM. 599 



better in the cool lious,\ especially 0. crisimm, 0. concolor, 0. curtimi, 

 0. Marshallianum, O-iwaetextum, O.Phalaenopsis, and O.inciirrinn. These 

 plants are very accommodating, since they will thrive in either house. 

 They are propagated by division of the pseudobulbs. The following are 

 all fine sorts, of easy culture, and ought to be in every collection. There 

 are, however, many other species of Oncidium worth growing, besides 

 those named in the following descriptions. 



O. ACINACEUM, Lindl. — A very distinct and elegant species -svith oval 

 pseudobulbs, each bearing three flat leaves, and producing flower scapes from 

 1 to 2 feet long, the upper portion of which becomes a twining raceme ; the 

 flowers are about 1 inch across, the sepals linear retuse, white, the lateral ones 

 connate, the petals broad obovate, violet bordered with white, and the concave 

 lip of the same colom-s, streaked with carmine; the column has two large 

 acinaciform ears. It should be grown in the cool house. — Peru. 



O. ACROBOTRYUM.-See O. Hamisonianum. 



O. ALBO-VIOLACEUM.-See O. inclrvum. 



O. AMPLIATUM, Lindl. — A showy species, with roundish compressed pseudo- 

 bulbs, flat oblong lanceolate leaves, and erect flower scapes branched at the top, 

 and forming an ample panicle, the flowers having a broad transverse sub- 

 rotund bilobed lip of a clear yellow, paler almost white behind, and with a 

 three-lobed callus at the base. There are two varieties of this species to be met 

 with in gardens, differing only in the size of the flowers, which are produced 

 in spring and summer. — Central America ; Sania Martha; U. S. of Colovihia. 



Fm.—Bot. licg., t. 1G99 : VritrJr.t .Van. Orcli. PI., viii. p. 8. 



O. AMPLIATUM MAJUS, Hort., is one of the finest Oncids in cultivation. It 

 produces its large bright yellow flowers in abundance, on a long branching spike 

 3 or 4 feet high, in April, May, and June, and continues blooming for two 

 months ; the flowers are almost white on the outer surface. This variety is a 

 robust-growing plant, and should be grown in a mixture of peat and sphagnum ; 

 when^in good health and well-flowered it is one of the finest of the Oncidiums for 

 exhibition purposes. — Central America: Costa Rica, Nicaragua, max. temp. 85". 



Fig. — Flore des Scrres, t. 2140 ; BficJicnbacliia, ii. t. 70. 



O. ANDIGENUM, Lind. et Rclib. — A very rare and beautiful species, similar 

 in growth to 0. concolor. " The sepals and petals are creamy -white, irregularly 

 blotched and dotted with dull crimson ; lip large, three-lobed, the side-lobes very 

 large, creamy-white, suffused with pink and blotched at the base with deep 

 velvety crimson, and dotted and freckled with the same colour ; front lobe 

 spotted with rich crimson, and bearing at its base a rich orange crest." The 

 only specimen known to occur in European collections is in the possession of 

 J. M. Bannerman, Es(j., Wyastone Leys, Monmouth. Flowers in autumn. — 

 Hcuddor. 



