GROUP IV. PHANEROGAMIA : AWQIOSPER1LE. 



517 



serted in the middle of its dorsal surface, when it is dorsifixed 

 (Fig. 331 A) ; in the last case it may be articulated as by a joint, 

 so that the anther with the connective can oscillate on the apex 

 of the filament (versatile anther, Fig. 331 0), as in Grasses and some 

 other plants. But the connective is often broader, so that the 

 halves of the anther are widely separated (Fig. 331 J3) ; it may be 

 much elongated (distractile) and very delicate, so that, with the 

 filament, it forms a T-shaped body (Fig. 331 0) ; in this plant, 

 the Sage, the further peculiarity is exhibited that one-half of the 

 anther is abortive and is modified for another purpose. It is only 



FIG. 331. Stamen: A^ Of Lilium: s fila- 

 ment; a the dorsifixed anther. A a Side 

 view. B Of Tilia: c connective. C Of 

 Salvia, with dorsifixed versatile anther : 

 b is the half of the anther that has been 

 modified. D Transverse section of the 

 anther of Hypericum (mag.) : p the 4 

 pollen-sacs ; c connective. 



FIG. 332. -4 Stamen of Allium. B 

 Of Vaccinium MyrtiUus. C Of Paris 

 quadrifolia (mag,): /filament; c 

 connective; a anther; b appen- 

 dages; p the pores by which the 

 anther opens. 



rarely, as in Herb Paris, that the connective is prolonged beyond 

 the anther into a point, or into a bristle as in the Oleander. 



The filament is usually round and stalk-like, of a delicate 

 coloured or colourless tissue, with a central vascular bundle ; it is 

 occasionally flattened ; when it is very short or absent the anthers 

 are sessile. 



In some plants, e.g. Allium (Fig. 332 J.), the filament has 

 what appear to be stipular appendages ; in others, e.g. Erica (Fig. 

 332 J5) and Asclepiadaceae, the anther is furnished with appen- 

 dages, such as spurs and so forth: in Viola, the "spurs borne by 

 the two anterior stamens are glandular. In certain plants the 



