72 



and more glaucous ; the flowers, which are rather smaller, 

 are extremely fugacious, opening in the morning and soon 

 closing again, and are a dead lead-colour, relieved only by 

 the yellow of the petals, which is itself bordered with very 

 bright light blue at the station of their principal convexity. 

 In addition to the general colour, the lower part of the cup 

 of the flower is banded with dull purplish brown. I have 

 never seen in any other plant of this order a tendency to 

 produce sterile stamens ; here however they exist in the 

 form of subulate membranous processes, alternating with the 

 perfect stamens and as long as their filaments. 



131. BANISTERIA tenuis. 



B. tenuis ; caule filiformi glabriusculo, foliis membranaceis lineari-oblongis un- 

 dulatis obtusis glabris, umbellis ramentaceis pedunculatis paueifloris, petalis 

 denticulatis, samara lsevi reticulata : ala oblonga venosa falcata. 



A genuine species of this genus as most recently limited, 

 inhabiting the neighbourhood of Buenos Ayres, whence its 

 seeds were obtained by the Hon. W. F. Strangways. It is a 

 greenhouse twiner, with small bright yellow flowers, and 

 though not handsome is quite pretty enough to deserve 

 cultivation. Its winged fruits are a rather bright reddish 

 green. 



132. PHYSOSIPHON carinatus. 



P. carinatus ; folio oblongo angusto obtuso aut emarginato racemis binis bre- 

 viore, calycis tubo triquetro angulis carinatis, labelli lobo intermedio serrato 

 scabro. 



A plant resembling Physosiphon Loddigesii in the colour 

 of its flowers, and the form of the leaves, but differing in 

 having a serrated labellum, whose surface at the point is 

 broken up into little sharp teeth. It has been recently ob- 

 tained in a live state from Mexico by George Barker, Esq. ; 

 but was originally met with by Schiede, growing upon the 

 trunks of trees near Sosocola in Mexico, as I learn from a 

 dried specimen (No. 8), for which I am obliged to Professor 

 Schlechtendahl. 



