■?6 



STAMENS. 



double roses some stamens appear entirely changed, others retain- 

 ing something of their form, and others are still perfect. When all 

 the stamens disappear, no perfect fruit is produced. On account of 

 this degeneration of the stamens, cultivated flowers are not usually 

 so good for botanical analysis as wild ones. The single flower ex- 

 hibits the number of parts which nature has given to it. The rose 

 in its native state has but five petals. 



Anther, is a little knob or box usually situated on the summit of 

 the filament; it has cells or cavities which contain a powdef called 

 the pollen ; this is yellow, and very conspicuous in the lily and 

 tuhp. You have here the representation (Fig. 80) of a stamen with 

 (7^%!.;^ its filament a, its anther b, and the dis- 



charging pollen c. In many flowers the 

 filament is wanting; the anthers are then 

 said to be sessile; that is, placed imme- 

 diately upon the corolla, as at d, which 

 represents a flower cut open, showing 

 its stamens growing sessile in the 

 I^Fig. SO. ^'^ throat. 



The figure at A, re- 

 presents a magnified 

 stamen,* with a lance- 

 olate anther, denticu- 

 late at the sides, with 

 two hairy appendages ; 

 filament short. 



At B 1, is a magni- 

 fied stamen,t with the 

 \a filament bearded at the 

 base ; the anther is two- 

 lobed, reniform. B 2 

 ^ shows the two cells in 

 ■^ each lobe, which is cut 

 horizontally. 

 At C,X the three fila- 

 ments ai-e distinct at the base, and connected at the upper part; an- 

 thers, adnate, linear, twisting. 



At D,§ the anther is sagittate, the filament bent, and glandular in 

 the middle, (at a.) 



At E, is a stamen of the Thyme, (family of the Labiatae ;) the 

 lobes of the anthers c, are divergent; a, is the filament, b, the con- 

 nective of the anthers. 



AtF, is a stamen of the Laurus ; a, cordate, pedicelled glands ; b, 

 pubescent filament ; c, anther opening by four valves, throwing out 

 pollen. 



At G, is a stamen of the genus Lavendula ; the anthers are reni- 

 form, cilicate, opening transversely, lobes confluent at the summit, 

 diver^nt at the base. 



At H, a stamen of the genus Begojiia ; the filament is enlarged at 

 the summit ; the two lobes of the anther a, a, adnate at the sides, 

 parallel distant. 



* Of the Cerinthe major, (family of the Eoragirteae.') 

 t Of the Tradescantia virginica. 

 t Of the Cucumber family. 

 § Of the Linden family. 



Anther— Explain Fig. 81 



