134 ASCLEPIADACEAE 



VINCA. Periwinkle. 



Evergreen trailing herbs with opposite petioled rather 

 small leaves; rather large perfect funnel- or salver-shaped 

 stalked gamopetalous flowers; and paired cylindrical follicles 

 which are infrequently seen. 



Leaves lanceolate: flowers blue. (Running "myrtle"). V. minor. 

 Leaves ovate, over 5 cm. long. V. major. 



Family ASCLEPIADACEAE. Milkweed Family. 



A moderate-sized family, chiefly of herbs with milky sap, 



some of which are used in hardy perennial planting. Hoya, 



the waxflower, and Stapelia, the star-"cactus", are frequent in 



greenhouses. Stephanotis is a favorite climber in warm regions. 



PEBIPLOCA. Silk Vine. 



Deciduous twining woody plants with milky sap; round 

 stems; opposite raised round leaf-scars with a single curved 

 bundle-trace; no stipule-scars; small hairy buds with few 

 scales; moderate entire petioled leaves; rather large perfect 

 purplish gamopetalous flowers in sparse stalked axillary clus- 

 ters'; slender paired follicles; and small winged seeds. 

 Leaves ovate, round-based, acuminate. P. graeca. 



Leaves lanceolate. P. graeca angustifolia. 



Family POLEMONIACEAE. Phlox Family. 

 A rather small family of herbs, much used as hardy peren- 

 nials. 



PHLOX. 



Mostly perennial herbs with opposite leaves; gamopetalous 

 salver-shaped white or reddish perfect flowers 1 in sometimes 

 panicled cymes; and small 3-seeded capsules. The following 

 somewhat woody evergreen matted species with small linear 

 leaves is used for rockeries, etc. 



Flowers bluish or pink. (Ground pink). P. subulata. 



Flowers white. P. subulata alba. 



Family VERBENACEAE. Verbena Family. 

 A moderately small family, chiefly of woody species in the 

 tropics, yielding the teak lumber used in ship-building. Among 



