Tas. 6254. 
ONCIDIUM STRAMINEUM. 
Native of Mexico. 
Nat. Ord. OrcHipem.—Tribe VANDEm. 
Genus Oncipium, Swartz, (Lindl. Fol. Orchid. Oncidium). 
Oncrptum(Paucituberculate) stramineum ; pseudobulbis 0, foliis oblongo-lanceolatis 
in petiolum brevem crassum angustatis subacutis crasse coriaceis dorso secus 
costam obtusis concoloribus, panicula breviuscula nutante densiflora, floribus 
pedicellatis 2 poll. diam. albis aurantiaco-maculatis, bracteolis parvis, sepalis 
rotundatis petalisque consimilibus margine crispatis, labelli breviter unguicu- 
lati lobis lateralibus oblongis falcato-recurvis carnosis intermedio substipitato 
reniformi longioribus, disci tuberculis 2 2-lobis v. 4 plus minusve per paria 
confluentibus, column brevis alis carnosulis decurvis. 
O. stramineum, Lindl. in Bot. Reg. 1838, Misc. No. 63; 1840, t. 14; Fol. Orehid. 
et Oneid., p. 36; Walp. Ann. vol. vi. p. 776. 
O. Columbe, O. Columbiz, et O. Lindeni, Hort. (fid. Rehb. f.) 
Lindley describes this, in the miscellaneous notices to vol. 24 
of the Register, as one of the first plants sent to the Horti- 
cultural Society by Hartweg, when collecting for that esta- 
_ blishment, and as being a stove epiphyte and native of Za-— 
cuapan, near Vera Cruz; but in the description published two 
years afterwards with the figure, he states that it will not 
bear the heat given to the West India Oncidia, for that in heat 
its leaves are small and flowers imperfectly developed, whereas 
under cooler treatment it flourished. This latter statement, 
coupled with the fact that it was found in company with a rare 
Berberry, raised the suspicion that it rather came from the 
mountainous parts of Mexico than the hot damp neighbour- 
hood of Vera Cruz. A reference to Bentham’s “ Plante Hart- 
wegiane,” (p. 29), favoured this view, for amongst the plants 
gathered by Hartweg at Zacuapan (a Zaquapan) were species of 
Monotropa, Lobelia and Hscobedia, all temperate forms ; and on 
reference to the extracts of Hartweg’s journals, published in 
the Horticultural Society’s Transactions (Ser. 2, vol. ii1. p. 116), 
I find that Zacuapan is a village elevated 3000 feet on the 
eastern slopes of Orizaba (itself 17,000 feet high), with a 
temperate climate and the richest vegetation in Mexico. 
do not find the name Zaquapan in any map accessible to me, 
