DtCOTYLEDONS. 101 



crenate-serrate ; stipules deciduous; corymbs terminal, peduncled, 

 nearly globose, pubescent, many-flowered ; pedicels and calyx nearly 

 glabrous ; follicles o-5, much longer than the calyx, smooth and 

 shining, obliquely tipped by the persistent style. April-May. Banks 

 of streams. 



II. SPIREA. 



Shrubs with simple leaves ; flowers perfect, in terminal or 

 axillary racemes or panicles ; calyx 5-cleft, persistent ; petals 

 5; stamens numerous; pistils usually 5, free from the calyx 

 and alternate with its lobes ; follicles not inflated, 2-several- 

 seeded. 



1. S. SALiciFOLiA L. Willow-leafed Spirea. Shrubs 2-5 ft. 

 high, branches smooth ; leaves lanceolate to oblong-ovate, smooth or 

 nearly so, sharply serrate, base usually cuneate, pale beneath ; stipules 

 deciduous ; flowers white or pink, panicle dense-flowered ; follicles 

 smooth. May-July. On low ground. 



2. S. Reevesiana Gard. Bridal Wreath. Shrubs 2-4 ft. 

 tall ; branches long, slender and spreading ; leaves lanceolate, ser- 

 rate, sometimes 3-lobed or pinnatifid, glaucous beneath ; flowers 

 white or pinkish, in axillary racemes or corymbs, often forming long 

 wreaths; follicles smooth. May-June. Introduced from Europe. 



3. S. TOMENTOSA L. Hardiiack. Erect slirubs ; stems tomen- 

 tose, usually simple ; leaves simple, ovate or oblong, serrate, densely 

 tomentose below, smooth and dark green above ; flowers small, pink 

 or purple, in a close panicle ; follicles 5, tomentose, several-seeded. 

 May-June. On low ground. 



III. PORTERANTHUS. 



Perennial herbs ; leaves nearly sessile, 3-foliate or 3-parted ; 

 flowers white or rose-colored, in loose corymbs ; calyx tubular- 

 campanulate, 5-toothed ; petals 5, unequal ; stamens 10-20 ; 

 follicles 5, included in the calyx, 2-4-seeded. 



P. stipulatus (Muhl.) Britt. American Ipecac. Stem 2-3 

 ft. tall, branches few ; leaves lanceolate, coarsely serrate or the lower 

 incisely lobed ; stipules leaf-like, ovate, serrate ; corymbs few-flowered, 

 flowers pink; petals linear-lanceolate, ^ in. long; follicles nearly 

 smooth. May--June. On hills in rich woods. 



