POPULAR FLORA. 



127 



8. Lance-leaved Violet. Leaves lance-shaped, erect, smooth ; petals not bearded. V. lanceolata. 



-M- -M- ++ Flowers light yellow, small. 



9. Round-leaved V. Leaves round ovate and heart-shaped, spreadmg flat on the groiind; side- 



petals bearded and brown-streaked inside. Cold woods, N. V. rotundifbUa. 



* * Leafy-stemmed species, 

 -t- Wild species, perennial, with heart-shaped leaves, blossoming nearly all summer. 



10. Long-spurred V. Spur h' long, considerably longer than the pale bluish corolla. V. rostrata. 



11. JIuhlenberg's V. Low, spreading by runners; spur stout, not more than half the length of 

 the pale violet corolla. Wet woods. V. Muhlenbergii. 



12. Pale V. Spur much shorter than the cream-colored corolla; lower petal streaked. V. striata. 



13. Canada V. Tall ; petals white above, violet-tinged beneath ; spur very short. V. Canadensis. 



14. Downy V. Tall, leafless below, downy; corolla yellow, spur very short. V. imbescens. 



-)- -t- Cultivated or run wild ; root annual or biennial. 



15- Heakt's-ease or Pansy V. Low; upper leaves oval, the lower heart-shaped; stipules large 

 and leaf-like, pinnatifid; corolla yellow-whitish, violet-blue, and purple, varying or mixed, large 

 and showy in the cultivated Pansy, becoming small when run wild. V. tricolor. 



13. CISTUS FAMILY. Order CISTACE^. 



This small family consists of low sliriibby plants or perennial herbs, in Europe with a 



showy corolla which opens only once, in sunshine, 

 the petals ftiHIng off at sunset. Here it contains 

 only a few less handsome, or homely, weed-like 

 plants. They may be known by the fbllowiug 

 marks. — Leaves some of them alternate. Calyx 

 remaining after blossoming, of 5 sepals, three of 

 them large and two smaller, often very small, the 

 latter entirely outside in the bud and looking like 

 bracts. Petals 5 or 3, all alike, overlapping each 

 other in the bud, each with one edire coverinfj the 

 one before it, but covered by that behind it. Sta- 

 mens from 3 to 20 or more, all separate, borne on 

 the receptacle. Pistil one, making a one-celled 

 pod, with the seeds borne on three lines down the 

 walls, or on projections from them, that is, with 

 3 parietal placentas. 



295 



^294. Flower, &c. of Fiostweeil. 293. Its calyx and 

 pistil. 293. Its ovary cut across and niagmfied. 



Petals 5, yellow, falling after the flower has opened for one day only. 



Style none. Petals crumpled in the bud, (Ilelidnthemum) Frostweed. 



Style slender. Little shrubs with minute leaves on sandy shores, (Hitdsdnia) Hudsonia. 



Petals 3, purplish, persistent. Flowers very small. {Lecliea) Pinweed. 



