ERICACEJS. (HEATH FAMILY.) 245 



2. S. perfoliata, A. DC. Somewhat hairy ; leaves roundish or ovate, 

 clasping by the heart-shaped base, toothed; flowers sessile, solitary or 2-3 to- 

 gether in the axils ; the upper and later ones only with a conspicuous expanding 

 (purple-blue) corolla ; pod oblong, opening rather below the middle. Dry hills 

 or open fields ; common. May - Aug. 



ORDER 62. ERICACEAE. (HEATH FAMILY.) 



Shrubs, sometimes herbs, with the flowers regular or nearly so: the stan*ent 

 as many or twice as many as the 4 5-lobed or 4^ 5-petalled corolla, free 

 from but inserted with it: anthers 2-celled, commonly apper*aged or open- 

 ing by terminal chinks or pores : style 1 : ovary 3 - 10-celled. Seeds small, 

 anatropous. Embryo small, or sometimes minute, in fleshy albumen. A 

 large family, very various in many of the characters, comprising four well- 

 marked suborders, as follows : 



SUBORDER I. VACCINIEJS. THE WHORTLEBERRY FAMILY. 



Calyx-tube adherent to the ovary, which forms an edible berry or berry- 

 like fruit, crowned with the short calyx-teeth. Anthers 2-parted. Pollen 

 compound (of 4 united grains). Shrubs or somewhat woody plants, with 

 scaly buds. 



1. GAYLUSSACIA. Ovary 8-10-celled, with a single ovule in each cell. Fruit a berried 



drupe with 8-10 small nutlets. 



2. YACCINIUM. Berry 4 - 6-celled (or imperfectly 8 -10-celled by false partitions), many- 



seeded. Anther-cells tapering upward into a tube. 



8. CHIOGENES. Berry 4-celled, many-seeded, its summit free. Anther-cells not prolonged 

 into a tube, but each 2-pointed. 



SUBORDER II. ERICINE^E. THE PROPER HEATH FAMILY. 



Calyx free from the ovary. Corolla monopetalous, or rarely nearly or 

 quite polypetalous, hypogynous. Pollen of 4 united grains. Shrubs or 

 email trees. 



TRIBE I. ARBTJTE^E. Fruit indehiscent, a berry or drupe. Corolla deciduous. 

 4. ARCTOSTAPHYLOS. Corolla urn-shaped. Drupe berry-like, 5 - 10-seeded. 

 TEIBE II. AJVDROMEDE^E. Fruit a pod opening loculicidally. Corolla deciduous. 



* Anthers upright in the bud, the cells opening lengthwise. Corolla salver-shaped. 

 6. EPIGJBA. Calyx of 5 separate dry and pointed sepals. Anthers not appendaged. 

 * * Anthers upright in the bud, opening only at the top. Corolla monopetalous, either glob- 

 ular, urn-shaped, bell-shaped, or cylindrical. 

 *- Calyx enlarged and berry-like hi fruit. 



6. GAULTIIEIUA. Calyx 5-cleft, hi fruit enclosing the small many -seeded pod. Anthers 4- 



awned at the top. 



- - Calyx dry, not becoming fleshy after flowering. 



7. LEUCOTHOE. Calyx imbricated hi the bud. Corolla cylindraceous, 6-toothed. Pod de- 



pressed, 6-lobed, the valves entire. 



8. CASSANDRA. Calyx imbricated. Corolla cyliadraceous, 6-toothed. Pod splitting when 



ripe into an outer and inner layer, the inner of 10 valves. 

 21* 



