EXOGENOUS OK DICOTYLEDONOUS PLANTS. 



439 



nislied with collecting hairs. — Ex. Campanula (Bell-flower, Hare- 

 bell), Plants of little known importance to man, except for or- 

 nament. 



851. Ord. Ericaceae {Heath Family). Shrubs, or small trees, rarely 

 herbs. Flowers regular and symmetrical, or nearly so ; the petals 

 sometimes distinct. Stamens mostly distinct, free from the corolla, 

 as many or twice as many as its lobes, and inserted with it (either 

 hypogynous or epigynous) : anthers often appendaged, commonly 

 opening by terminal pores. Pollen compound (of four united 

 grains) except in the last suborder. Styles and stigmas united into 

 one. Ovary with two or more cells and usually numerous ovules, 

 free, or in Vaccineae coherent with the calyx-tube. Seeds usually 

 indefinite, albuminous. — Most botanists give the rank of orders to 

 the following suborders. 



852. Subord, Vacciniese ( Whortleberry Family). Ovary adnate to 

 the tube of the calyx, becoming a berry or drupaceous. ■ Anthers 

 two-celled ; the cells nearly distinct, mostly prolonged above into a 

 tube. Shrubs, with scattered or alternate leaves, often evergreen. — 

 Ex. Vaccinium (Bilberry, Blueberry, Cranberry) and Gaylussacia 

 ("Whortleberry or Huckleberry). 



853. Subord, EricinCEB {True Heath Family). Ovary free from 

 the calyx. Fruit capsular, sometimes baccate or drupaceous. 

 Mostly shrubs. Leaves various, often evergreen. Petals rarely 

 distinct. — Ex. Erica (Heath), Kalmia, Rhododendron, Gaultheria, 

 Andromeda, &c. 



FIG. 907. Branch of Rhododendron Lapponicum. 908. Enlarged flower, with its pedicel and 

 bracts. 909. A flower with the corolla removed, more enlarjied. 910 The capsule of R. maxi- 

 mum, opening by gepticidal dehiscence ; the valves breaking away from the persistent axis, 

 or columella. 



