82 



PRINCIPLES OP PLANT-TERATOLOGY. 



larger number of stamens present. Arundina pentandra 

 bas all three of the outer whorl and the two anterior 

 lateral ones of the inner whorl present and fertile. 

 Epidend.nim (Htonis is triandrous, A 1 of the outer 

 whorl, and a l and a 2 of the inner whorl being present. 

 In Neuwiedia (of the sub-order Diandrse) the stami- 

 node of C ijpripedium is present in the form of a fertile 

 stamen. 



We should naturally expect cases of reversion, under 

 one form or another, to occur in abnormal flowers; and 

 such are quite frequent. In Masters' works will be 

 found a fairly full account of them. 



In a flower of Pogonia ophioglosxoidex, described by 

 Asa Gray, the perianth was normal. There were two 

 accessory labella just in the position of the two sup- 

 pressed stamens of the outer whorl (A 2 and A 3 ), and 

 there was a small petaloid structure corresponding to 

 Aj. In another flower the two lateral stamens of the 

 inner whorl (<x 3 and a 2 ) were represented in the form of 

 slender filaments. The third stamen of the inner 

 whorl and the stigmas may be represented by some or 

 all of the remaining petaloid structures. 



Flowers of Gattleya labiata and Odo?itoglosmm 

 crispum were seen with three stamens in the column. 

 The two extra ones probably represented stamens a~ 

 and a 6 of the inner whorl, but this was not certain. 

 The rest of the flower in each plant was normal. 



Schlechter and Fischer describe flowers of Odonto- 

 glossum grande which were most perfectly peloric 

 throughout. All three petals were alike and mainly 

 resembled the normal lateral petals ; the column con- 

 sisted of three anthers, all exactly alike, and, therefore, 

 presumably all belonging to the outer whorl ; there 

 were three rostella and stigmas (hi. XXX VII, figs. 5 

 and 6). 



Masters saw a flower of Cj/pripedium, barbatum in 

 which the staminode (A : ) of the outer whorl was 

 fertile. In another flower the converse condition to 

 that normally obtaining occurred, viz., the staminode 



