172 



JNIANUAL OF BOTANY 



unilocular, or one-celled, as in the Mallow (fig. 359), Milkwort 

 {fig. 341), and Lady's Mantle {fig. 342) ; this arises either from 

 the abortion of one lobe of the anther, and the absorption of the 



Fig. 340. 



Fig. 341, 



Fig. 343. 



Fig. 344, 



Fig. 345, 



Fi'i, 'MO. Fonr-celled autlier of the Ploweriug Rush {lititomus itinheUatm). 

 a. Filament bearing an entire anther, h. Section of the anther with its 



four cells. Fig. 341. Androecium of Milirwort (^Polygala), with eight ono- 



celletl anthers dehiscing at their apex. Fig. 342. One of the stamens of 



the Lady's Mantle (^Alchemilla). The anther is one-celled, and dehisces 



transversely. Fig. 343. Stamen of the Sage {Salvia), f. Filament. 



c. Elongated connectiye, separating the two lobes of the anther, one of 



which, Xf, produces pollen, while the other, Is, is sterile. Fig. 344. The 



androecium and gyuoecium of the Vine {VUis vinifera). a. Anther. 

 c. Furrow in its face which is turned towards the pistil or gynoecium. 



6. Suture or line of dehiscence. The anther is introrse. Fig.Z^^. The 



perianth cut open, showing the stamens, of the Meadow Saffron (^Colchicum 

 aiittimnale), \^ith extrorse anthers. 



septum between the two sporangia of the lobe that is left ; or 

 from the destruction of the partition wall of the two lobes as well 

 as of the septa between the sporangia of each lobe. In many 

 species of Salvia, the connective becomes elongated into a kind 



