Ericaceae 8 1 



loculicidal. Seeds with loose testa and fleshy endosperm. 

 Embryo of few cells without cotyledons. 



Subfamily i. Piroloideae. Anthers recurved before 

 flowering, then erect, opening by two pores. Pollen in 

 tetrads. 



Only British genus (herbs with broad evergreen 

 leaves): Pirola (including Moneses). 



Subfamily 2. Monotropoideae. Anthers always 

 erect at the apex of the filament, opening by slits. 

 Pollen simple. 



Tribe Monotropeae. Ovary 4-5-loc below, i-loc 

 above. 



Only British genus (colourless root-parasites): 



Monotropa. 



Fam. 2. Ericaceae. Usually low shrubs. Leaves 

 mostly evergreen. Flowers solitary or racemose, 5-4- 

 merous, obdiplostemonous. Corolla usually sympetalous. 

 Stamens on the edge of a hypogynous or epigynous disc. 

 Anther-thecae free, tubular, often spreading above and 

 with basal or dorsal appendages. Pollen in tetrads. 

 Gynaecium syncarpous. Ovules i-oo in each carpel on 

 di^W^ placentae. Style i, stigma capitate. Fruit various. 

 Seeds with loose testa and copious efidosperm. Embryo 

 often very short. 



A. Septicidal capsule. Petals {vqq or \m\\.td. Anthers 

 without appendages. Testa loose, often winged. 



Subfamily i. Rhododendroideae. As above. Puds 

 scaly. 



