154 ALTERATION OF POSITION. 



median formations, but they produced secondary buds in 

 the axils of the segments of the perianth. These latter 

 buds were themselves the subject of tertiary prolifica- 

 tion of both kinds, median and axillary. The tertiary 

 median growths, like the primary flower, did not 

 develop median buds, but only lateral ones quater- 

 nary axillary prolification. 



The accompanying diagrams are intended to show 

 the plan of arrangement in these flowers. Fig. 69 

 shows the disposition of parts in the primary flower 

 and the situation of the axillary buds. Fig. 70 shows 



Pig. 70. Diagram to explain the construction of the double-flowered 

 Orchis. 



1. The primaiy flower, with no median bud, the position of which, 

 had it been present, is shown by the dotted line. 



2. Two axillary buds proceeding from 1, and themselves giving 

 origin to 



3. 3. Median buds, and 3', 3', axillary buds. 



4' -i'. Axillary buds, proceeding from 3. No median bud is produced 

 from 3 ; its situation, had it been present, is indicated by the dotted 

 line. 



the primary flower without any central prolongation, 

 but giving off" axillary buds, two of which are shown 

 in the diagram, 2, 2; these are, each of them, the 

 subject of both median, 3, 3, and axillary prolification, 

 4', 4'. 



In Narcissus major a similar combination of both 

 forms of prolification exists, as described by Morren.^ 



On the general subject of Prohfication in flowers, in 



' Bull. Acad. Belg.,' t. xx, part ii, p. 271. See also Bellynck, ' Bull. 

 Soc. Bot. Belg.,' t. vi, ex. ' Bull. Soc. Bot. France,' t. xiv, 1867, Rev. 

 Bibl., p. 241. Orchis mtulata. 



