94 CISTACEAE (ROCKROSE FAMILY) 



round-shaped, on very long petioles, obscurely- 

 lobed and crenate ; flowers clustered in the 

 axils ; petals whitish, twice as long as the calyx ; 

 carpels pubescent. Roadsides and cultivated 

 grounds. 



CISTACEAE ( ROCKROSE FAMILY) 



Maiva rotundifolia, ^ ow shrubs or herbs with simple, mostly 



Common mallow. . , , .. 



entire leaves and regular flowers. Stamens 

 numerous and distinct. Capsules i-celled. 



HELIANTHEMUM 



Shrubby plants with petals fugacious (or none). Stamens nu- 

 merous in the petal-bearing flowers. Stigma nearly sessile. The 

 earlier flowers with large yellow petals and indefinitely numerous 

 petals. The later flowers much smaller, with small petals or none, 

 and 3 to 10 stamens. 



H. canadense, FROSTWEED. Hoary, pubescent, reaching 5 dm. in 

 height ; leaves lance-oblong, pale beneath ; the large flowers solitary, 

 the small flowers clustered on short branchlets. Sandy or gravelly 

 soil. June to August. 



HUDSONIA 



Small bushy shrubs covered with scale-like, persistent, downy 

 leaves. Numerous small, showy, yellow flowers, crowded along 

 the upper part of the branches. Style long and slender. 



H. tomentosa. Heath-like plant, hoary with down; leaves oval 

 or oblong, close pressed and imbricated ; flowers sessile, or nearly so. 

 Sandy shores. May, June. 



VIOLACEAE (VIOLET FAMILY) 



Herbs, with alternate, stipulate leaves, axillary, nodding flowers, 

 an irregular corolla of 5 petals (one of them spurred or saccate}, 

 5 stamens connivent over the pistil, and a i-celled, ^-valvcd pod. 



