AO2 MEIOTAXY IN 
faces upwards; it is oval and symmetrical, and a light 
eroove across its middle shows it to be dimerous. The 
placenta, accordingly, are only two. The groove on 
the stigma and the placentze are in line with the fertile 
stamens. 
Here, therefore, is a symmetrical and complete, 
regular, but dimerous orchideous flower, the first ver- 
ticil of stamens not antheriferous, the second anthe- 
riferous, the carpels alternate with these; and here we 
have clear (and perhaps the first direct) demonstration 
that the orchideous type of flower has two stamineal 
verticils, as Brown always insisted.” 
Dr. Moore, of Glasnevin, kindly forwarded to the 
writer a flower of Calanthe vestita (fig. 198), in which 
there were two sepals only, anterior and posterior, and 

Fic. 198.—Regular dimerous Fie. 199.—Regular dimerous 
flower of Calanthe vestita. flower of Odontoglossum Alewandre. 
two petals at right angles to the two sepals. The hp 
was entirely wanting, but the column and ovary were 
