( 2101 ) 



Calostemma luteum. Yellow Calostemma. 



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C/tfss #wd Order. 

 Hexandria Monogynia. 



Generic Character. 



Corolla supera, infundibuliformis, limbo sexpartito. Nee 

 tarium tubulosum, ore 12-dentato, dentibus alternis subu- 

 latis antheriferis. Anther ce versatiles. Germen l-loculare, 

 2 — 3-spermum. Stylus filiformis. Stigma obtusum. Bacca 

 [Capsula~\ sphasrica, 1 — 2-sperma. 



Specific Character. 



Calostemma luteum; foliis lineari-Ioratis, nectario subintegra 

 inter stamen utrumque bidenticulato. 



However readily this plant and the preceding are dis- 

 tinguished by the colour of the flowers, it is not easy to find 

 specific distinguishing characters. The corolla of luteum 

 is somewhat larger and less connivent ; but the principal 

 difference exists in the nectarium, which, at least in the few 

 specimens that we had an opportunity of examining, had a 

 margin more entire, not divided into so distinct lacinia?, or if 

 the smaller indentations can be considered as lacinia?, the 

 filament rises from the sinus between the lacinias and not 

 from the middle of the Iacinia as in purpureum. But we 

 must acknowledge that we have not examined a sufficient 

 number of flowers to be certain that this distinction will 

 always hold good. If not, the colour of the flowers alone 

 makes it probable that they are not mere varieties ; for it has 

 been doubted whether purple flowers ever vary to yellow 

 in the same species ; the few instances in which this variation 

 has been supposed to take place being uncertain. There are 

 six bright crimson spots on the base of the nectarium which 

 Show through the interstices between the outer Iaciniee. 



This 



