176 DOGBANE FAMILY 



The larger floating-heart is common in the edges of 

 lakes, and in sluggish streams and ditches, where it grows 

 with other water plants. When not in bloom, the plants 

 may be identified by the small heart-shaped leaves, which 

 are roughened and pitted on the lower surface. (See 

 Plate No. 29.) 



Nsnnphoides aquaticum (Linmanthemum) . Flowers white, 

 about •/4 in. across, clustered. Calyx and corolla 5-lobed, 

 stamens 5. Leaves heart-shaped, thick, 2-6 in. long. Ponds 

 and streams. Blooming from spring to fall. Pla. to N. J. 

 and Texas. 



Njnnphoides lacunosmn. Flowers slightly smaller than in 

 above species. Leaves only 1-2 in. long. Fla. to La. and 

 northward. 



DOGBANE FAMILY (Apocynaceae) 



Flowers tubular below, expanded and 5-lobed above. Sap milky. 

 Leaves entire. 



The most cheerfully ubiquitous flower in the Florida 

 peninsula is the cultivated periwinkle of this family, 

 which, though it escapes from cultivation, is so thoroughly 

 domesticated that it shows no inclination to wander off 

 by itself into the country, but remains near towns, where 

 it blossoms all the year in pink and white. 



A native plant of this family, the pretty Amsonia ciliata, 

 often seen on sandy roadsides, blooms in loose clusters of 

 starry flowers above delicate foliage of many narrow leaves. 

 A bluish tinge, shading into green, is usually present in 

 the corolla tube. 



Several interesting twining or shrubby vines with large 

 flowers, and long seedpods borne in spreading pairs, are 

 found in the southern part of the peninsula. Of these an 

 attractive rubber-vine, Rhabdadenia hiflora, climbs on 

 trees, and opens fragrant white flowers nearly all the year. 



Our cultivated members of this family include the alia- 



