SECTION 9.] 



STAMENS. 



99 



282. Insertion, or place of attachment. The stamens usually go with 

 the petals. Not rarely they are at base 



Epipetalous, that is, inserted 

 on (or adnate to) the corolla, as 

 in Tig. 283. When free from 

 the corolla, they may be 



Hypogynous, inserted on the 

 receptacle under the pistil or 

 gynoecium. 



Perigynous, inserted on the 

 calyx, that is, with the lower 

 part of filament adnate to the 

 calyx-tube. 



Epigynous, borne apparently on the top of the ovary ; all which is ex- 

 plained in Fig. 270-274. 



Grynandrous is another term relating to insertion of rarer occurrence, 

 that is, where the stamens are 

 inserted on (in other words, 

 adnate to) the style, as in 

 ^ Lady's Slipper (Fig. 284), and 

 in the Orchis family generally. 

 283. In Relation to each 

 Other, stamens are more com- 

 monly 



Distinct, that is, without any 

 union with each other. But 

 when united, the following 

 technical terms of long use 285 

 indicate their modes of mutual connection : 



Monadelphous (from two Greek words, meaning " in one brotherhood "), 

 when united by their filaments into one set, usually into a ring or cup 

 below, or into a tube, as in the Mallow Family (Fig. 286), the Passion- 

 flower (Fig. 260), the Lupine (Fig. 287), and in Lobelia (Fig. 285). 



Diadelphous (meaning in two brotherhoods), when united by the fila- 

 ments into two sets, as in the Pea and most of its near relatives (Fig. 288), 

 usually nine in one set, and one in the other. 



Triadelphous (three brotherhoods), when the filaments are united in three 

 sets or clusters, as in most species of Hypericum. 



FIG. 283. Corolla of Morning Glory laid open, to show the five stamens inserted 

 on it, near the base. 



FIG. 284. Style of a Lady's Slipper (Cypripedium), and stamens united with it ; 

 a, a, the anthers of the two good stamens ; st, an abortive stamen, what should 

 be its anther changed into a petal-like body ; stig, the stigma. 



FIG. 285. Flower of Lobelia cardinalis, Cardinal flower ; corolla making approach 

 to the ligulate form; filaments (st) monadelphous, and anthers la) syngenasious. 



