60 ONCIDIUM. 



On. maculatum. 



Pseudo-bulbs ovoid, 3 — 4 incbes long, mucb compressed, with 2 — 3 

 ribs on each of the flattened sides, diphyllous. Leaves linear-ligulate, 

 7 — 10 inches long. Scapes 12 — 18 inches long, racemose along the 

 distal half, rarely paniculate. Flowers 2 inches in diameter ; sepals and 

 petals sub-equal, lanceolate-oblong, acute with reflexed tip, yellow, some- 

 times yellow-green heavily blotched with dark chestnut-brown ; lip 

 oblong-ovate, apiculate, obscurely three-lobed, the side lobes reduced to 

 small triangular auricles, the basal half white, the apical half yellowish ; 

 crest consisting of four plates, of which the two middle ones are the 

 largest, white streaked with red. Column wings narrow, horn-like below. 



Oncidium maculatum, Lindl. Sert. Orch. sub. t. 48 (1838). Id. Fol. Orch. Oncid. 

 No. 113 (1855). Knowles and Westc. Fl. Cab. II. t. 67. Cyrtochilum maculatum, 

 Lindl. in Bot. Reg. 1838, t. 44. Id. Kcrt. Orch. t. 25. Bot. Mag. t. 3836 (ecornutum). 

 Id. t. 3880. 



A species very common in some parts of the Mexican province of 



Vera Cruz. It was first sent to the Horticultural Society of London 



by Hartweg in 1837; and two years later it was sent to the Woburn 



collection by Mr. Parkinson, Her Majesty's Consul in Mexico. For 



some years after its introduction, Oncidium maculatum was one of 



the most popular of the genus, but it is now rarely seen in amateur 



collections ; at that time it was generally known as Gyrtochilum 



maculatum * It is one of the most variable of Oncids as regards 



the colour of its flowers. 



On. Marshallianum. 



Pseudo-bulbs ovate-oblong, 4 — 6 inches long, compressed, diphyllous. 

 Leaves oblong-lanceolate, acute, 7 — 12 or more inches long, complicate 

 at base. Panicles 3 — 5 or more feet long, much branched. Flowers 

 variable in size and colour, the finest forms 2^ — 3 inches across vertically ; 

 dorsal sepal obovate-oblong, concave, dull yellow barred with pale 

 red-brown ; lateral sepals nearly concealed by the lip, oblong, connate 

 ■ to about one-third of their length, and coloured like the dorsal one ; 



* Althougli Cyrtochilum has long since disappeared from the list of genera, it frequently 

 occurs in the orchid literature of the period above referred to. It was founded by Humboldt 

 and Kunth in the early part of the century on Cyrtochiluin tmdulatum {Oncidium undulatum 

 of Lindley), a very different plant from that figured under this name in Williams' Orchid 

 Album, VIII. t. 368. It is chiefly distinguished from Oncidium by the labellum being 

 much smaller than the other segments, its front lobe narrow, entire and bent back under 

 the crest, the character tliat suggested the generic name, KvpTug, "bent," and ^hXoq, "a lip"; 

 it thence corresponds to Bentliam's section Microciiila. The group of species to which 

 this form of the lij) is peculiar, combined with other characters both floral and vegetative, 

 constitute as fairly a natural genus as Miltonia or Odoutoglossum ; but the Cyrtochilum of 

 Humboldt and Kunth as thus circumscribed was afterwards thrown into confusion by the 

 addition of such species as Oncidiu7n maculatuvi, On. concolor, Millonia flavcsccns, Odouto- 

 glossum bictonejisc and others which do not conform to its essential character, and which 

 subsequently led to its rejection. 



