DICOTYLEDONOUS PLANTS 103 



ovary. Petals 5, cut-fringed, inserted on the throat of the 

 calyx-tube. Stamens 5 or 10, not projecting from the calyx- 

 tube. Styles 2, very short. Ovary and pod 2-beaked, 

 globular, 1-celled. 



1. M. diphylla, L. Two-leaved Bishop's Cap, Fringe Cup, 

 Fairy Cup. Stemless, with long-petioled, roundish-cordate root- 

 leaves, and a scape about 1 ft. high, bearing 2 oj^posite, nearly ses- 

 sile leases. Flowers many, racemed, white. AVoods. 



IV. HEUCHERA, L. 



Perennials with a tall scape and roundish, heart-shaped 

 radical leaves. Flowers rather small, greenish or purplish, 

 in a long panicle. Calyx 5-cleft, the tube below adnate to the 

 ovary. Petals 5, small, spatulate, inserted with the 5 sta- 

 mens on the margin of the calyx-tube. Capsule 1-celled, 

 2-beaked, splitting open between the beaks. 



1. H. americana, L. Common Alum Root. Scapes 2-4 ft. high, 

 rather slender, often several from the same root, hairy and glandu- 

 lar. Radical leaves large and long-petioled, abundant, somewhat 

 7-lobed. Flowers whitish with a tinge of purple, in a loose panicle. 

 Stamens projecting considerably outside the flower, their stamens 

 of a bright terra cotta color. The root is very astringent and is 

 somewhat used as a home remedy. Shaded banks, fence rows, and 

 thickets ; common W. 



V. PHILADELPHUS, L. 



Shrubs. Leaves simple, opposite, 3-5-ribbed, petioled, 

 without stipules. Flowers solitary or in cymes, large, white. 

 Calyx-tube top-shaped, adnate to the ovary, the limb 4-5- 

 parted, persistent. Petals 4-5, rounded or obovate. Stamens 

 20-40, shorter than the petals. Ovary 3-5-celled, many- 

 seeded ; styles 3-5, more or less united.* 



1. P. grandiflorus, Willd. Large-flowered Syringa. Shrub, 

 6-10 ft. high ; branches downy. Leaves ovate or ovate-oblong, 

 taper-pointed, sharply serrate, downy, 3-ribbed. Flowers solitary or 

 2-3 together, white, lj-2 in. broad, not fragrant. Calyx-lobes 

 ovate, taper-pointed, about twice as long as the tube. On low 

 ground, S., and cultivated.* 



2. P. coronarius, L. Garden Syringa. Shrub, 8-10 ft. high. 

 Leaves oval or ovate, obtuse at the base, acute at the apex, remotely 



