58 



MORPHOLOGICAL BOTANY. 



Hasu (Fig. 68), but sometimes the face is turned outwards 

 towards the floral envelopes, as in the Ayame (see Fig. 69). 

 When turned inwards the anther is said to be Introrse ; 

 and when turned outwards it is said to be Extrorse. 



Direction of the anther j 



Introrse. 

 Extrorse. 



Dehiscence of the Anther. — The act of discharging 

 its contained pollen is called the Dehiscence of the Anther. 

 This dehiscence takes place in different ways : in the com- 

 monest case each anther-lobe opens longitudinally, as in the 

 Mokuren (Fig. 65) and Hasu (Fig. 68) ; in some cases it 

 splits transversely, as in the Hinjimo (Lemna trisulca) 



Fig. 70. 



Fig. 71. 



Fig. 70.— Flower of the Hinjimo Fig. 71.— Stamen of the Nasubi 

 (Lemna trisulca) (Solatium Melongena) 



with anthers opening transversely, with the anther opening by pores. 



(Fig. 70) ; in some it opens by a hole or holes, as in the 

 Nasubi (Solatium Melongena) (Fig. 71) and Tsutsuji 

 (Rhododendron indicum) ; and in others the whole or 

 portions of its face open like trap-doors, as in the Hebino- 

 boradzu (Fig. 66) and all species oiLindera. The first kind 

 of dehiscence is said to be Longitudinal, the second kind 

 Transverse, the third kind Porous, and the last Valvular. 



