GROUP IV. — PHANEROGAMIA : ANGIOSPERMiE. 



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 two 

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

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

 filament, it forms a T-shaped body (Fig. 331 G) ; 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: « fila- 

 ment; a the dorsifixed anther. A^ Side 

 view. li Of Tilia: c connective. C Of 

 Salvia, with dorsifixed versatile anther : 

 h 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.— i4 Stamen of Allium. B 

 Of Vnccinium, Myrtillus. 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 brLstle 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 A), the filament has 

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

 332 B) 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 



