ODONTOGLOSSUM HALLII zinez XANTHOGLOSSUM_ res. £ 
OponToGLossuM HALLu, Lindl.: aff. Odontoglosso luteopurpureo, Lindl., sepalis tepalisque longe acuminatis, labello basi cordato obcuneato ante 
medium hastato triangulo abrupte acuminato lacero denticulato, carinis in disco basilari radiantibus serratis, columna utrinque (vulgo tantum) bicirrhosa. 
ODONTOGLOssUM HALLir, Lindl. Bot. Reg., 1837, sub. 1992!; Bot. Reg., 1845, misc. 60!; Folia Orch, I., Odontoglossum, Nr. 6!; excl. loco 
Lindeniano, nec Lindl., Orch, Lind., Nr, 84; Rchb.f, Xenia Orchid. I, tab. 63, I, pag. 178!; Rchb. f. in Gard. Chron., 1865, p. 962, c. xyl.!; Batem. Odont., 
tab. 21, cum xyl. optime !; Illust, Hort., Ser, 3, 58!; Floral Mag., 378 ; Warner Sel. Orch., III, 10!; Hook. Bot. Mag., 6237! (videtur O, mulus, Rchb. f.) 
Pseudobulbus ligulatus seu pyriformis anceps, media costatus. Folia lineariligulata gemina in pseudobulbo, stipantia minora basi vaginata, Pedunculus 
racemosus seu paniculatus, Bracte triangule minute. Sepala a basi cuneata oblongolanceolata acuminata apice nunc torta. Tepala paulo breviora sub- 
qualia margine hinc angulata. -Labellum altius cum columna connatum ope unguis linearis, lamina refracta subpandurata, portio postica utrinque rotundata, 
hinc minuta lobulata, portio antica ovato triangula acuminata marginibus fimbriato laceris ; falcula radiantes uni- pluriserrate in disco basilari, Sepala 
atropurpureo et flavo varie picta. Tepala flava atropurpurea maculata. Labellum album maculis atropurpureis, 
b JM, Rehb. f, Gard. Chron, 1879, June 7, p. 786: labello flavo atropurpureo picto. 
it in Andibus ecuadoriensibus. Lloa, Hall! Quito, Jameson! Wallis! Karsten! Lehmann ! Pichincha, Hartweg ! 
Papa 
rhs) 
Figure analyticae, Columna et labellum a latere. Labellum expansum. Columne pars superior antice. Pollinarium a latere. Omnia aucta. 
CotoneL Hart’s Odontoglossum is looked upon as the finest and noblest of a numerous and puzzling group of 
Odontoglossums known among Orchid growers as the luteo-purpureum section. There is a conspicuous similarity of 
growth and flower in the species comprising this group, though there is a vast difference between the finest, such as 
O. Hallii, and the inferior forms, which are usually undecided in colour and poor in form. The flowers of all exhibit a 
great diversity in their markings, but a prevailing tint of chestnut-brown and yellow runs from one end of the chain of 
species to the other. 
O. Hallii is a native of Ecuador, that delightful Orchid region whence so many of our cool Orchid house treasures 
have come. It was known to botanists long before living plants reached Europe. Colonel Hall first discovered it, and 
subsequently Dr. Jameson met with it in other parts of the Ecuadorian Andes. When Lindley received dried specimens 
of it he pronounced it to be a most beautiful plant, and this encomium was sufficient to set Orchid growers longing to 
possess and nurserymen to import it. At length Wallis sent living plants of it in 1865 to Mr. Linden. During the time 
that has since elapsed it has not been imported largely, as it is a most difficult plant to bring to Europe, the plants being 
so liable to perish at Guayaquil, the port whence collected plants are shipped, the heat there being often as high as 
120 deg. F., and this heat prevails during the journey by rail across the isthmus of Panama. Among the largest 
importations have been those sent home by Wallis, who was particularly successful in obtaining it. 
There are several forms of O. Hallii in collections, some being much superior to others, and a few are so distinct 
as to be worthy of varietal names. The typical form has large, bold flowers, with broad greenish-yellow sepals heavily 
blotched with brown, and with a large, white labellum. This is called in gardens leucoglossum in order to distinguish it 
from the yellow lipped variety, xanthoglossum, the subject of our present plate. Tbere is also a variety named 
magnificum, the flowers of which are much larger than those of the type and with richer colours. 
The culture of this Odontoglossum is similar to that recommended for O. crispum, but the imported plants are not 
easily established, the pseudo-bulbs being so soft and fleshy. It is a good plan to hang the bulbs head downwards 
until they show signs of rooting, for then the bulbs are not so liable to rot. The plants should be potted immediately 
roots are seen protruding from the bases of the bulbs, and water should be given gradually. This Orchid must be kept 
growing all the year round, and only during the time it is in bloom should it be kept a little drier. A cool and moist 
atmosphere, abundance of light (but no direct sunlight), and thorough ventilation, are the essential conditions to observe 
in the treatment of this fine species. 
Our plate was drawn, by permission of Baron J. H. W. Schréder, from a plant in the Dell collection, Egham. 
