14 
ONCIDIUM stramineum. 
Straw-coloured Oncidium. 
GYNANDRIA MONANDRIA. 
Nat. ord. ORCHIDACEA, Y VANDER. 
ONCIDIUM. Botanical Register, vol. 9. fol. 727. 
O. stramineum ; ebulbe, foliis crassis carnosis ovato-lanceolatis acutis dorso 
rotundatis scapo paniculato rigido erecto brevioribus, sepalis subrotundis 
 unguiculatis concavis liberis integerrimis, petalis dupló majoribus ob- 
longis obtusis emarginatis margine crispis, labelli lobis lateralibus ob- 
longis carnosis acutis margine -revolutis basi’ columnee proximâ nectari- 
feris intermedio reniformi plano emarginato longioribus, tuberculis disci 
4 geminatis, columne alis carnosis linearibus obtusis elongatis genuflexis 
decurvis. Bot. Reg. 1838. misc. no. 63.- 
Of this pretty species a short account has already been 
given in this work among the miscellaneous matter for the 
year 1838. It was one of the first plants sent from Vera 
Cruz to the Horticultural Society by Mr. Hartweg, who 
found it at a place called Zacuapan, where some other fine 
things, especially the rare and beautiful Berberis tenuifolia, 
were obtained. 
This species is readily known when out of flower by its 
rigid fleshy unspotted leaves, rounded, not keeled, at the 
back. When in flower the stiff panicles, and pale straw 
coloured blossoms, smelling slightly of primroses, together 
with the peculiar form of the wings of the column, and the 
almost orbicular sepals, offer sufficient means of recognition. 
Fig. 1. represents the lip and column, the latter with the 
narrow falcate deflexed wings peculiar to this species ; fig. 2. 
is a transverse section of a leaf to show its thickness and. 
peculiar form. 
O. stramineum will not submit readily to the same treat- 
ment as is given to the West Indian species of this genus. 
It is injured by that degree of heat in which they flourish; 
the leaves which it forms under it are small, and the flowers 
