Revisions of Some Plant Phyla 53 



mostly 2-celled ; ovules many ; placenta axile ; fruit a capsule 

 dehiscing circumscissillely. Plantago. (Pf. IV, 3b, 363.) 



Family 153. Plumbaginaceae. Leadworts. Herbs with alter- 

 nate or clustered leaves; stamens opposite the petals; ovule i, 

 basal, anatropous ; fruit capsular ; dehiscence valvate or irregu- 

 lar. Plumbago, Armeria. (Pf. IV, i, 116.) 



Family 154. Theophrastaceae. Tropical trees and shrubs 

 closely related to the preceding family, and usually included in 

 it. Thcophrastaj Jacquinia. (Pf. IV, i, 88.) 



Family 155. Myrsinaceae. Trees and shrubs with alternate 

 (or opposite) leaves; stamens opposite the petals; ovules usually 

 few; fruit a drupe or berry. Myrsine, Ardisia. (Pf. IV, i, 84.) 



Order Ericales. Flowers regular, perfect; stamens alternate 

 with the corolla-lobes ; cells of the ovary, or placentae 2 to many ; 

 seeds minute. 



Family 156. Clethraceae. White Alders. Shrubs and trees of 

 warm climates, with alternate deciduous leaves; stamens 10; pistil 

 tricarpellary. Clethra. (Pf. IV, 1,1.) 



Family 157. Ericaceae. Heaths. Shrubs and small trees with 

 mostly evergreen leaves; ovary typically superior, 2- to lo-celled; 

 anthers usually dehiscing by an apical pore. Rhododendron, Kal- 

 mia, Gaultheria, Arctostaphylos, Gaylnssacia, Vaccinium, Cal- 

 luna. Erica. (Pf. IV, i, 15.) 



Family 158. Epacridaceae. Shrubs and small trees with 

 mostly alternate evergreen leaves ; ovary superior, mostly 2- to 

 lo-celled; fruit capsular or drupaceous; anthers dehiscing by a 

 slit. Epacris. (Pf. IV, i, 66.) 



Family 159. Diapensiaceae. Low undershrubs, with alternate 

 evergreen leaves; ovary superior, 3-celled; fruit a capsule; an- 

 thers dehiscing by a slit. Diapensia, Shortia. (Pf. IV, i, 80.) 



Family 160. Pirolaceae. Wintergreens. Low evergreen, or 

 chlorophylless herbs, with pentamerous or tetramerous (rarely 

 hexamerous) flowers; stamens twice as many as the petals; ovary 

 4- to 6-celled. Pirola, Chimaphila, Monotropa. (Pf. IV, i, 3.) 



89 



