BOTANICAL NOTICES OF NEW PLANTS. 



143 



VANDEiE. LEOCHILUS ONCIDIOIDES. 



Leochilus (nov. gen.). Perianthium connivens. Sepala lateralia basi connata. Petala 

 conformia. Labellum columna continuum integerrimum. Columna nana basi alata. Gynizus 

 subquadratus. Clinandrium marginatum rostratum. Pollinia duo globosa cavata. Anthera 

 unilocularis. Caudicula linearis. Glandula minuta. Herba Mexicana. Pseudo bulbosa. 



Pseudo bulbs ovate, bearing at the apex one or two lanceolate leaves. Scape drooping, 

 simple, arising from the base of the pseudo bulbs, bearing many dull purplish-coloured flowers. 

 Bracts nearly as long as the pedicel and ovarium, scarious, ovate, acute, with a strong midrib. 

 Sepals of a dull purplish colour, lanceolate, ribbed, the lateral ones joined about half way up 

 from the base and situate under the labellum. Petals the size of the sepals, connivent and 

 ribbed, and marked similar to the sepals. Labellum smooth, continuous with the column, 

 ovate, lanceolate, obtuse, marked more distinctly than the sepals and petals. Column very 

 short, having two wings at the base. Stigma somewhat of a square form, smooth. Clinan- 

 drium surrounded with a membranaceous margin, and beaked in a similar manner to Oncidium 

 Ornithorhyncum. Pollen-masses two, globular, hollow, situate just below the apex of a linear, 

 obtuse caudicula. Gland minute. Anther one-celled, having exteriorly on each side two round 

 beaked projections. 



This genus is very nearly related to Oncidium, particularly to O. carinatum, from which it 

 principally differs in having a smooth, not a tuberculated or crested labellum. It is a native 

 of Mexico, and is in the collection of G. Barker, Esq., Springfield, by whom it was imported in 

 1837. 



Trigonidium Acuminatum. {Bateman.) " Found in Demerara by Mr. Colley and other 

 collectors. It is a small, though interesting species. The flowers are of a dull straw-colour 

 externally, but are most elegantly pencilled on the inside with a rich brown. The petals in 

 this, as in all the other species, have each a dark-coloured callosity at their apex, which is placed 

 in such a manner near the entrance of the triangular cup which the sepals form, that the 

 appearance of a pah* of eyes peeping out is produced." — J. B. in Bot. Reg. No. 10, N. S. We 

 had an opportunity of examining a specimen of this new species about three months ago, in 

 the collection of John Willmore, Esq., of Oldford, and (which is a somewhat curious coinci- 

 dence) we at the same time named it T. acuminatum; though the strikingly acuminate shape 

 of the sepals, when compared with the other species, would naturally suggest the specific name. 

 We would remark, however, that the thin and delicate structure of the sepals in this species 

 (which are in fact semi-pellucid) renders " sepala herbacea" as part of the generic character of 

 Trigonidium, inappropriate ; and shows the difficulty of drawing a perfect generic character 

 from a single species. 



Oncidium Unicornutum. One-horned Oncidium (sp. nov.). O. unicornutum; pseudo 

 bulbis oblongis compressis costatis diphyllis, foliis lineari-lanceolatis, scapo simplici gracili 

 glauco multifloro, sepalis petalisque late lineari-spathulatis, inferioribus in unum connatis ; 

 labelli lobis lateralibus rotundatis denticulatis, intermedio subcuneato basi unicornuto, crista 

 elevata, transversa, columnae alis abbreviatis. 



A new and interesting species ; it is a native of the Organ Mountains, and has recently 

 flowered in the collection of John Willmore, Esq., of Oldford. 



