TKRATOl.OCilC iS^OTES. 



18" 



lias an extrorse antlier. The petaloid 

 stylo arm lacks the usual stig'uiatic flaji 

 and the ovarian cavities are entirely ol)- 

 1 iterated. This flower has been divided 

 in such a wav that the two division lines 

 have passed throug'h the tiower in the 

 manner indicated in the Horal diaoram 

 ( Fiii'ure 35) where the heavily shaded 

 parts represent the organs that are pres- 

 ent. 



Dimerous Syhunctnj In Citltlcya Flowers. From the or- 

 chid greenhouse of the Ihiiversitv of Pennsylvania was ol)tained 

 a flower of Cattleya sp. that showed dimerous instead of trimer- 

 ous symmetry. The two sepals opposite to each other were ex- 

 actly of the same size and appearance, standing in a lateral ])osi- 

 tion. The two petals (not hooded) stood in a posterior and an 

 anterior position respectively and were exactly the counterparts 

 of each other. 



Ahnormal Flowers of riiajus ^Ya]Hr]lii. A single raceme 

 of this orchid showed two anomalous flowers. The sixth flower 

 from the bottom of the raceme had only two sepals, the anterior 

 sepal was absent, while t^^'o petals were present, one of the an- 

 terior lateral petals being suppressed. The seventh flower from 

 the bottom showed two lateral sepals, an anterior petal (second- 

 ary lalxdlmn) an<l a ]iosterior petal (true labellum) each jietal 

 spurred at the base. Each labellum developed also two wing- 

 like projections, which probably represent the two posterior lat- 

 eral stamens of the outer row, which are considered to l)e inti- 

 mately fused with the edffes of labellum. From another raceme 

 with nineteen flowers on jNfarch 15, 1906, I secured two teratol- 

 ogic flowers, one with two sepals and two labella like the ]n-eced- 

 ing, and one with two sepals and each of the petals modified into 

 a labellum. two of them with spurs. 



Proliferated Flowers in Adonis davurica. From Dreer's 

 Xursei-y T secured on jNfarch 20, lOO.T, two ]u-oliferated flowers 



