FAMILIES OF FLOWERING PLANTS 



119 



Family Droseraceae. Sundew Family. Another interesting fam- 

 ily, with a somewhat peculiar geographical distribution. There are six 

 genera; Drosera, with about 110 species, occurs in temperate and sub- 

 tropical regions of both hemispheres, being particularly abundant in 

 Australia; Dlonma is a monotypic genus, restricted to a limited area 

 along the coast of North and South Carolina; Aldrovandra, another 

 monotypic genus of south Europe and Asia; Byhlis, with two Australian 



Fig, 104, Thread-leaved sundew (D.filiformis). After Berry in Asa Gray Bulletin, Vol. V. No. 5, 



species; Roridida, with two South African species; and DrosophyUum, a 

 monotypic half-shrubby genus of Portugal. With the latter exception, 

 the plants are marsh or aquatic herbs, glandular-jiubescent, and exud- 

 ing a viscid secretion; they are mostly scapose, the leaves in a tuft or 

 cluster at base. The flowers are solitary or racemose, with a 4-5-parted 

 persistent calyx and 5 hypogynous petals; stamens 5-20; ovary 1-3- 

 celled, the style often cleft or divided (see Fig. 103). 



