ATTACHMENT OF THE ANTHER 



63 



and the production of a sccoiHlan- or "false" i)artition separating each 

 theca h)ngitudinally into two locclli. This inipHes a four-h)cellatc 

 condition of all anthers (Fig. K)S). Ordinarily this condition is not 

 permanent, the false septa more or less completely (lisa])i)earing after 

 the formation of the pollen, leaving the mature, antlier two-celled, or 

 this condition is brought about in other ways. 



Attachment of the Anther. — The Adnaic Form.— It is furthermore 

 assumed that the filament is normally continued along the back of 

 the anther in the relation of the midrib of the formative leaf. This 

 form of attachment is called Adnate (Fig. ]2()). 



Fig. 126. Adnate anther of Magnolia. 127. An incumbent anther. 128. Twisted anther of Ceiba. 

 129. Versatile anther of Oenothera. 130. Innate anther of Sangumaria. 131. Reniform confluent 

 anther of Malva. 132. Horizontal confluent anther of Pcnlslemon. 133. Sagittate anther of Taber- 



naemontana. 



Iiicinnhctit Form. — It ma>' be attached only at some ])oint u])()n the 

 back (I)orsifixed). Of this there are two forms. In one (Fig. 127) the 

 anther is rigidly fixed, its lower portion close to and ])arallel with but 

 free from the upper portion of the filament, the Incumbent form. 



]'ers(iiUe Form. — In the other, it moves freely upon the pivotal 

 l)()int of attachment (Fig. 129), the Versatile form. Rarely the anther 

 is wrapped or twi.sted about its filament (Fig. 128). 



Innate Form.— Thv continuation of the filament, instead of being 

 along the back, may be centrally up through the base and between the 

 thecae (Fig. 130), the Innate form. 



SiiKjiiidtc Form. — The lower ])ortions of the thecae may be separated 

 from one another and from the connective (Fig. 13.3), the Sagittate form. 



Reniform (inti Ilor/'jnifdl Form.^-. — The sagittate condition is some- 

 times extreme, the antliers becoming more or less reiiifonn (Fig. 131) 

 or semicircular, or tlicy may e\fii become liori/.ontal I l''ig. 132). This 



