256 



Till; FLOWER. 



proper filament, and bearing an anther-cell at each end. In a 

 few species, the two anther-cells arc nearly alike ; in more, the 

 lower one is imperfect, as in Fig. 510; in more, it is abortive 

 or wanting altogether, as in Fig. 510 fc . Then, in the related 

 California!) genus Aiuliliertia. the lower half of this connective 



is reduced to a short tail, as shown in Fig. 511, or even in 

 most of the species to so minute a vestige that, except for these 

 transitions, the stamen might be supposed to consist of a simple 

 filament, with an interruption like a splice in tin- middle, and 

 surmounted by a one-celled anther, as shown in Fig. all 6 . In 

 Rosemary, the continuity is complete, although a minute reflexed 

 tooth sometimes indicates the junction. 



470. Polleii, the product of the anther, is usually a powdery 

 substance, which when magnified is seen to consist of separate 

 grains, of definite size and shape, uniform in the same plant, 



.-,11' 513 M4 I' 



but often very different in different species or families. The 

 grains are commonly single cells, globular or oval in shape, and 

 of a yellow color. But in Spiderwort they arc oblong; in the 



KKS. nos -r.ll. Anthers, with nppor pnrt of filament. >f several Lahiata'. . r >OS. Of 

 Monarda. ->n:i of. -i <':il:iiniiiihii. 510 Of two species of SaMa, ^wlth long and slender 

 connective, the upper fork c,f which bears one anther-cell; the lower in a (from Snlvia 

 Texanai. l.eaiiie,' the othercell in an imperfect condition; in l> (from S. coccinea), bear- 

 ing none at all. nil.rc. Same of Audil.ertia irranditlora. the lower fork of the connec- 

 tive reduced to a naked spur; l>. from A. stachyoides, in which this lower fork is nearly 

 wanting, and the upper is in a straight line with the filament which it seems to 

 continue. 



Kit;. 512-515. Forms of pollen: 512, from Mimulus moschatus; 513, Sicyos; 514, 

 Kchinocystis; 515, Hibiscus. 



