TllK .M'TIM'J'lDN iiF l'l,A,\TS 



1 <:;.': 



swiiUowc'd Ijy aniiiiuls. Some couiiiiou illustr;itioiis ;ii'e as 

 follows : 



(1) I'ilrhvr jiJidits. — In these pLuits the leaves form 

 tuhes, or iinis, ol ■\'ui'ioiis foi'iiis. ^^■hieh eontaiii water, and 

 to which insects are a.( trad eil and drowned (see Fiij;. 14(i). 

 iV pitcher plant common Ihronghont the SoiUhern States 

 may be taken as a type (see Fig. 147). The leaves are 

 shaped like slender^ Iiollow cones, a,nd rise in a tuft from 



tlie swampy ground. 

 The montli (if tljis 

 conical urn is over- 

 arched and shaded 

 Ijy a. hood, in ■\vhi(di 

 are ti'ansluceid". spots, 

 like snndl windows. 

 Around the mouth 

 of the u r n a r e 

 glands, wliieh se- 

 crete a sweet li([uid 

 {nedur), and nectar 

 drojis foi'm a. trail 

 down the outside of 

 the ui'ii. Inside, just 

 lielow the rim of tlie 

 urn, is a glazed zone, 

 so smooth that insects 

 cannot walk upon it. 



Flu. 155. A Rui-duw, ri.owiiii; rnsvltu habit of IScloW the ghlZcd ZOUC 



iiiu iiusett-caidiins; luavL's, jg another zone, 



thiiddy set with stiff, 

 downward-pointing hairs, and below this is the li(|uid in 

 the l;ottom of the urn. 



If a lly is attracted by the nectar drops \x\xn\ this curious 

 leaf, it naturally follows tlie trail up to the rim of tlie urn, 

 where the nectar is abundant. If it attempts to descend 

 within the urn, it slips on tlic glazed zone, and fulls into 



