THE DEHISCENCE OF ANTHERS BY APICAL PORES. 



177 





-corolla ganiopetalous, globose, urceolate, tubular, infundi- 

 buliform, campanulate or almost rotate, generally 4-5-lobed, 

 very rarely divided to the base ; stamens usually twice as 

 many as the lobes of the corolla, equal or alternately un- 

 equal, free or nearly free from the corolla, exserted or 

 more generally included ; filaments usually long, various in 

 form ; anthers basifixed or dorsifixed at the base or below 



the 



by 



pores or more or less extensive slits, sometimes produced 



m one or 



more 



two often very lor 

 the top with small pores or 



sometimes provided dorsally with aristae or setaceous 

 appendages. 



All Ericaceae are here included in this type. Galanthus 

 and Leucojum of the Amaryllidaceae, with their pendulous 

 flowers and perianth closely approximated around the an- 

 droccium, may also be tentatively assigned to this type. 



P. 



may 



be treated here, as may also Clethra of the Clethraceae, 



the Pirolaceae. 



Chimaphila and P 



The floral ecology of this group is not discussed here. 



is chiefly of the Ericaceae and the two 



Our knowledge 



genera from the Amaryllidaceae. Many 



upon these will be found recorded in 

 Knuth. 



Handb 





V. DILLENIACEOUS TYPE. 



Both whorls of perianth usually developed, but one or 

 both sometimes reduced, usually campanulate or rotate in 

 disposition; stamens indefinite in number; filaments long 

 or short, free or variously united; anthers mostly elongate, 



ifixed; flowers usually actii 

 roecium sometimes zygomor 



throughout, but 



or variously united carpels ; flowers generally highly col- 

 ored and conspicuous. 



12 



