LESSON 17.] 



TIIK STAMENS. 



Ill 



LESSON XVII. 



MORPHOLOGY OF TIIK STAMENS. 



284. The Sta:me\s exhibit iiearly the same kinds of variation in 

 (liH'crent species that the calyx and corolhi do. They may be dis- 

 tinct (that is, separate from each other, 2G7) or united. Tliey may 

 he free (2('>"J), or else coherent with other parts : this concerns 



285. Their Iliserlion, or pUice of attachment, which is most com- 

 monly the same as that of the corolla. So, stamens are 



Hypogynous (2G9), when they are borne on the receptacle, or axis 

 of the flower, under the pistils, as they naturally should be, and as is 

 shown in Fig. 212. 



Perigynous, when borne on (that is coherent below with) the 

 calyx ; as in the Cherry, Fig. 213. 



Epigynons. when borne on the ovary, appar- 

 ently, as in Fig. 21(3. To these we may add 



Gynandrons (fron\ two Greek words, answer- 

 ing to ''Stamens and pistil united"), when the 

 stamens are Consolidated with the style, so as 

 to be borne by it, as in the Lady's Slipper 

 (Fig. 22G) and all the Orchis Family. Also 



Epipetalous (meaning on the petals), when 

 they are borne by the corolla; as in Fig. 19-1, 

 and in most mouopftalous blossoms. As to ^*^ 



280. Their L'llioil Milh each other, the stamens may be united by 

 tlieir filaments or by their anthers. In the former case they are 



Monadelphous (from two Greek words, meaning '* in one brother- 

 hood "), when united by their filaments into one set, usually into a 

 ring or cup below, or info a tube, as in the Mallow Familv, the 

 Titssion-flower, and the Lupine (Fig. 22.S). 



Diadelphous (in two brotherhootls), when so united in two sets, 

 as in the Pea and almost all papilionaceous flowers (27.'>): liere 

 the stamens are nine in one set, and one in the oilier (Fig. 227). 



T\C.. OOll St\lc or.% I,aily's .'^lipixr (l-ypriprctiiiitO, nnd sfnnipns tinilod with it : a, a, the 

 aiKlicrv iif the two pooil i<tninpnH ; .it., ,iii abtiriive utaiuvii, whal tthuulil l>« iLi aiithcr cUaiigvJ 

 iiitu a pelal-liko body ; sti^., tJio uliguia. 



