APPENDIX I 447 



A. Polypetaly, as well as sympetaly, occurs; 2 whovls, 

 or I whorl, of stamens ; usually hypogynous ; some- 

 times epigynous. 

 Order i. Ericales. — Flowers 5- to 4-merous, 

 obdiplostemonous, or the stamens before the petals 

 absent, bisexual, usually actinomorphic ; petals free 

 or united ; stamens hypogynous or epigynous, rarely 

 united to corolla at base ; carpels (2 to indefinite) ; 

 when isomerous, usually opposite petals ; ovary 

 superior or inferior. 



Family i. Pirolace^ (Vol. II, p. 319). — Flowers 

 solitary or in racemes, obdiplostemonous, 5-4-partite ; petals 

 free or united ; stamens hypogynous ; carpels (5-4) ; ovules 

 indefinite, minute ; fruit a capsule. 

 Sub-Family i. Piroloideae. 



Genus. Pirola (including Moneses). 

 Sub-Family 2. Monotropoideae. 

 Tribe. Monotropece. 



Genus. Monotropa (Vol. II, p. 320). 

 Family 2. Ericaceae (Introductory Vol., p. 151 ; 

 Vol. II, p. 314). — Flowers solitary or in racemes, obdiplo- 

 stemonous, 5-4-partite; stamens 5, 8, 10 ; anthers usually 

 opening by apical pores ; pollen in tetrads ; gynoecium 

 syncarpous ; ovules i to indefinite ; styles i. 

 Sub-Family i. Rhododendroideae. 

 Tribe i. Ledece, 



Genus. Ledum. 

 Tribe 2. Rhododendrecc. 



Genus. Rhododendron (including Azalea). 

 Tribe 3. Phyllodocece. 



Genera. Loiseluria^ Phyllodoce^ Daboecia. 



