216 ERICACEAE. 



1. H. americana (D.C.) Small. Plants tawny or yellow, finely pubescent or 

 nearly glabrous, 1-3 dm. tall: sepals 7-10 mm. long: petals sparingly pubes- 

 cent: capsules oval or oblong-oval, 7-10 mm. long. — S. Occasional, in woods. 



2. H. lanuginosa (Michx.) Nutt. Plants deep pink and crimson, markedly or 

 copiously pubescent, 0.5-3.5 dm. tall: sepals 6-9 mm. long: petals markedly 

 pubescent : capsules globular, 4-5 mm. long. — Common, in woods and thickets. 



Family 3. ERICACEAE. Heath Family. 



Shrubs, trees, or undershrubs. Leaves often persistent : blades com- 

 monly leathery. Flowers typically perfect. Calyx of 4-7 distinct or 

 partially united sepals. Corolla of 4-7 distinct or partially united petals, 

 sometimes slightly 2-lipped. Androecium of as many or twice as many 

 stamens as there are petals : anthers opening by pores, chinks, or valves. 

 Gynoeeium of 2-7 united carpels. Fruit a capsule, or sometimes baccate 

 or drupaceous. 



Capsule septicidal : anthers unappendaged. 



Anthers opening by pores : corolla not salverform : erect 

 shrubs or trees : capsules dry. 

 Flowers from scaly buds : corolla irregular : seeds winged. 



Corolla of a funnelform type : leaves deciduous ; blades gland-tipped. 



1. Azalea. 

 Corolla of a campanulate type : leaves persistent ; 



blades not gland-tipped. 2. Rhododendron. 



Flowers not from scaly buds : corolla regular : seeds not 



winged. 3. Kalmia. 



Anthers longitudinally dehiscent : corolla salverform : pros- 

 trate and creeping slightly shrubby plants : capsules fleshy. 4. Epigaba. 

 Capsule loculicidal, sometimes enclosed in the fleshy accrescent 

 hypanthium and calyx {Gaultheria) . 

 Calyx dry, not accrescent : fruit dry, not berry-like. 



"Capsules not angled, the valve-margins not thickened : 



calyx-lobes imbricate, at least in the bud. 5. Eubotkys. 



Capsules angled or the valve-margins thickened : calyx-lobes 

 valvate or separate in the bud. 

 Filaments appendaged : corolla of a cylindraceous- 



campanulate type. 6. Neopieris. 



Filaments unappendaged : corolla of an urceolate type. 7. Aesenococcus. 

 Calyx fleshy, accrescent : fruit fleshy, berry-like. 8. Gaultheria. 



1. AZAIjEA L. Erect deciduous-leaved shrubs. Leaves alternate: blades 

 sometimes bristle-toothed. Calyx deciduous: lobes 5, conspicuously ciliate. 

 Corolla variously colored, funnelform: tube elongate: limb 2-lipped. Stamens 

 5 or rarely 10, conspicuously exserted: anthers with terminal pores. Style 

 declined. Capsule elongate. 



Corollas expanding before the leaves ; limb deep-pink or purple. 1. A. nudiftora. 

 Corollas expanding after the leaves ; limb white or pale-pink. 

 Calyx-lobes ovate to triangular-ovate : leaves with the midrib 



strigillose beneath. 2. A. viscosa. 



Calyx-lobes lanceolate to linear : leaves with the midrib gla- 

 brous beneath. 3. A. arhorescens. 



1. A. nudiflora L. Shrub 0.5-3 m. tall, the twigs tomentulose and strigose- 

 hispid: leaf -blades oblong to obovate, 3-10 cm. long, hispidulous beneath: 

 pedicels 10-20 mm. long: corolla deep-pink to purple, or rarely white; tube 

 about 2 cm. long: capsules 1-3 cm. long, strigose or hirsute-strigose. — Com- 

 mon, in woods. — Spr. — Honeysuckle. Pinxter-flower. 



2. A. viscosa L. Shrub 1-3 m. tall, the twigs hispidulous: leaf-blades oblong 

 to elliptic-oblanceolate, cuneate, or obovate, 2-6 cm. long, strigillose beneath: 

 calyx-lobes 1-2 mm. long: corolla white or pale-pink; tube 2-2.5 cm. long: 

 anthers about 2 mm. long: capsules 1.5-2 cm. long, slender, rather strigose, 

 gradually narrowed at the apex. — N. S. Common, in moist thickets. — Sand- 

 stones and shales, schists. — Spr. and sum. — Swamp-honeysuckle. Clammy- 

 azalea. 



