47 ^' 



PHANEROGAMS. 



the lime, where the five primordial stamens also branch at the margins, and form 

 anthers on their branches, the stamens remain free, but in other respects the 

 phenomena are altogether similar [cf. Payer I. c.) 



Fig. ■i'^.—Althaa rosea ; A horizontal section through the young andrcecium ; B a piece of the tube of a mature 

 andrcecium with several stamens ; h cavity of the tube, -o substance of the tube, a anthers, / the spot where the 

 filament divides, /"the spot v/here two filaments spring from the tube {A much more strongly magnified than B). 



The stamens not unfrequently suffer conspicuous displacements by the inter- 

 calary growth of the tissue of the receptacle in the region of their insertion ; and 

 such displacements are also ordinarily included under the term cohesion (or adhe- 

 sion) \ Thus the stamens often adhere to the calyx or corolla; and then, when 



Y\C..->,y^.—V\ov&x oi Mauglesia glabraia; 4 before open- 

 ing ; B open ; C the gynaeceum, ^p the gynophore ; D hori- 

 zontal section of the ovary ; E fruit ripening on its pedicel. 



Fig. 340. — Flower oi Sterciilia Ealaiis^has ; 

 A, ss the gynophore, y ovary, n stigma ; B hori- 

 zontal section of the ovary. 



mature, the filaments appear as if they sprang from the inside of the perianth ; 

 the earliest stages of development show, however, that the perianth-leaves and the 

 stamens spring in succession and separately from the receptacle ; it is not till a later 

 period that intercalary growth begins at the part of the receptacle from which both 

 spring ; in this manner a lamella grows up which structurally forms the basal portion 

 of the perianth-leaf, and which at the same time bears the stamen, so that the 



* [It has come to be the usage in English works on descriptive botany to apply the term 

 ' cohesion ' to the apparent union of organs of the same kind, ' adhesion ' to the apparent union of 

 organs of a different kind.— Ed.] 



