HILLS AND ROCKY WOODS 279 



ish. Leaves, long and narrow or oblong, partly clasping the 

 stem by somewhat arrow or heart shaped bases. Time, May, 

 June. 



Sepals, 4. Petals, 4. Stamens, 6, 2 short, 4 long. Pistil, i, 

 producing in fruit a long, slender, upright pod, 2-valved by a 

 thin partition. Stem, rough, erect, simple, i to 2 feet high. 



7 



A. laevigdta has root-leaves occasionally lyre-shaped, stem- 

 leaves similar to those above. A smooth plant, taller than 

 the last. 



8. Sickle-pod 



A. Canadensis has sessile stem-leaves, acute at apex and base, 

 the lower ones toothed. Pods, rough and hairy, flat, curved, 

 hanging on hairy stalks. 



9. Tower-mustard 



A. perfolidta is the tallest species, 2 to 4 feet, with yellowish- 

 white petals, oblong or lance-shaped stem-leaves; pods 3 inches 

 long and very narrow. Around rocks. 



A. lyrdta differs in having much-cut and lyre-shaped root- 

 leaves, with stem-leaves entire or sometimes toothed. Petals 

 long, sepals yellowish green. 



These all bear rather small white blossoms in terminal, fiattish 

 racemes. 



II. Starry Campion 



Silene siellata. — Family, Pink. Color, white. Leaves, in 

 whorls of fours, smaller towards the top, simple, pointed, some- 

 what toothed. Time, June, July. 



Calyx, bell-shaped and swollen, with 5 points, often brown- 

 ish or reddish, sticky. Petals, 5, fringed, on claws. Stamens, 



