24 



yellow, shaded with a faint greenish tinge. Sepals oblong- 

 lanceolate, acute, all about one size, and not spreading very 

 wide. Petals scarcely so long as the sepals, and rather 

 narrower, reflexed at the point. Labellum 3-lobed, the 

 middle one about the length of the petals, but a good deal 

 broader, with a roundish spatulate recurved point, slightly 

 indented in the centre ; lateral lobes very small, their edges 

 curved outwards, and having in the hollow between them, 

 which is of a brownish yellow, a roundish oblong reddish 

 tubercle, extending towards the base of the column, which 

 is marked with several deep red spots. Column about two- 

 thirds the length of the petals, a little curved, and rounded 

 above, hollowed beneath and somewhat angular, with a 

 brownish point." 



The foregoing note is from Mr. Booth. The plant was 

 sent to the Horticultural Society of London, from Mexico, by 

 Mr. Hartweg, their collector in that country, and was found 

 in the neighbourhood of Vera Cruz. I have also had it 

 from the very rich collection of Thomas Harris, Esq. of 

 Kingsbury. It is scarcely more than a yellow-flowered 

 variety of M. variabilis. 



27. PLEUROTHALLIS circumplexS. 



P. circumplexa ; folio coriaceo ovato emarginato in petiolum carinatum canali- 

 culatum ipsi aequalem angustato, caule subnullo, pedunculo basi folii im- 

 merso et circumplexo, floribus capitatis ovariisque pubescentibus, capitulo 

 disticbo sexfloro basi vaginato, sepalis hiantibus erectis inferioribus in umim 

 oblongum rotundatum supremo brevius connatis : supremo angustiore sub- 

 panduriformi, petalis lineari-oblongis ciliatis, labello crasso calceiformi 

 serrulato margine calloso. 



A curious new species of this genus, obtained from Mexico 

 by Messrs. Loddiges, with whom it flowered in February, 

 1838. It approaches P. saurocephala and prolifera, differing 

 from both in the peduncle being strictly embraced by the 

 base of the leaf, so as to give the flowers an epiphyllous ap- 

 pearance. The latter are small and of a dull dirty brownish 

 yellow colour. 



