188 



7° Same variety. Stamen completely jiliform but vnth only one 

 antkercell so that the petaloid half is luanting means either 

 the absence of .v or suppression of the stamen proper and 

 X replaced by a stamen. 

 8° 2\vo styles grown together at the base, both of them three-vnnged 

 seems to indicate that a style may produce more than one 

 wing. The case probably refers to doubling of the main style 

 as in fig. 21 which I drew from a specimen collected in the 

 autnmn of 1915. 

 Mention has also been made in the same place of a few ob- 

 servations with regard to irregularities in the arrangement of 

 the sepals and the petals. 



Hilversum (Holland), December 1915. 



LIST OF THE FIGURES. 



1. Diagrams after Eiciiler, A and B. 



2. Brickred Canna. s...s: insertioa of the sepals, 2?',p', p': basal portions of the 

 petals, a, y aad J the same of three alae, lah.: labellum, x\ the partly peta- 

 loid stamen, /3: one of the outer alae, st\ stigma with the upper portion of 

 the style. , 



3. The same after removal of |3 viewed from the labellum which has been care- 

 fully cut away. 



4. The same. Front wall of the flowertube turned over to the left, s and s' • 

 rudimentary styles, m: anther-bearing filament, 6': functioning style. 



5. Flowertube transversely cut just above the ovary, S: style (if). 



6. The same, somewhat higher up, p...p: petals, «, ^, y and I indicate their 

 respective vascular bundles. S: style, s and s': indications of their vascular 

 bundles (','). 



7. The same. The petals p' and p^ detach themselves from the tube, y and I 

 are being differentiated, also labellum. 



8. Petals p' and p2 altogether away, having left the tube, further stage of 

 development of |3, the tube narrowed in the direction a?— labellum. 



9 and 10. The hind wall shrinking, alae detaching themselves. 



11. The basal portion of « differentiating from the tube. 



12. The front wall of the tube disappearing. 



13. Vertical section of the tube in two equal halves to show its widening in the 

 middle and its strong narrowing at the upper end. 



14. Strong development of the rudimentary style s' connected with S by means 

 of the membrane constituting the hindwall of the flowertube. The filament 

 strongly contrasting with x on the same radius as s'. 



