ERICACEAE (HEATH FAMILY) 627 



M- -M. Corolla urceolate to cylindrical, 5-toothed ; not heath-like. 



16. Leucothoe. Calyx slightly or much imbricated, naked or bibracteate. Corolla ovoid or 



cylindraceous. Capsule depressed, 5-lobed, the valves entire. 



17. Andromeda. Calyx valvate and very early open, naked. Anthers 2-4-awned. Capsule de- 



pressed-globose to obovoid, not thickened at the sutures. Seeds mostly hanging on the 

 central placenta. 



18. Lyonia. Calyx, etc., much as in Andromeda. Anthers awnless. Capsule 5-angled, the 



sutures with corky or spongy thickenings. 



19. Chamaedaphne. Calyx of rigid imbricated ovate sepals, bibracteate. Corolla cylindraceous. 



Capsule splitting \vhen ripe into an outer and inner layer, the inner of 10 valves. 



20. Oxydendrum. Calyx short, early open, naked. Capsule slender-pyramidal. Seeds all 



ascending. A small tree. 



-i- +- Anther-cells opening through their whole length, not appendaged. 



21. Epigaea. Corolla salver-shaped. Calyx of 5 separate dry and pointed sepals. 



* * Calyx becoming enlarged and berry-like in fruit. 



22. Gaultheria. Calyx 5-cleft, in fruit inclosing the capsule. Anthers 4-awned at top. 



Tribe III. ARBtfTEAE. Fruit indehiscent, a bony or drupe. Corolla deciduous. 



23. Arctostaphylos. Corolla urn-shaped. Drupe berry -like, 5-10-seeded. 



Tribe IV. ERiCEAE. Corolla persistent, becoming scarious. Capsule septicidal. 



24. Calluna. Corolla bell-shaped, 4- parted. Leaves minute, opposite, imbricate. 



SUBFAMILY IV. VACCINOtDEAE (WHORTLEBERRY SUBFAMILY) 



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

 fruit, crowned with the short calyx-teeth. Anther-cells opening at the apex. 

 Shrubs or somewhat woody plants, with scaly buds. 



25. Chiogenes. Berry 4-celled, many-seeded, its summit free. Anther-cells not prolonged into 



a tube, but each 2-pointed. Slender trailing evergreen. 



26. Gaylussacia. Ovary Id-celled, with a single ovule in each cell. Fruit a berry-like drupe 



with 10 small seed-like nutlets. 



27. Vaccinium. Berry 4-5-celled (or imperfectly S-10-celled by false partitions), many-seeded. 



Anther-cells tapering upward into a tube. 



1. CLETHRA [Gronov.] L. WHITE ALDER 



Sepals imbricated in the bud. Petals obovate-oblong. Anthers arrow-shaped, 

 erect in the bud, becoming inverted. Style slender. Capsule 3-valved, many- 

 seeded, inclosed in the calyx. Shrubs or trees, with alternate serrate decidu- 

 ous leaves, and white flowers in terminal hoary racemes. Bracts deciduous. 

 (K\?70pa, the ancient Greek name of the Alder, which this genus somewhat 

 resembles in foliage.) 



1. C. alnifblia L. (SWEET PEPPERBUSH.) Shrub l-o m. high ; leaves 3.5-7 

 cm. long, wedge-obovate, sharply serrate, entire toward the base, prominently 

 straight-veined, smooth, green both sides ; racemes upright, usually panicled ; 

 petals white, rarely pink ; bracts shorter than the flowers ; filaments smooth. 

 Wet copses, Me. to Fla., mostly near the coast. July-Sept. 



2. C. acuminata Michx. A tall shrub or small tree ; leaves oval or oblong, 

 pointed, thin, finely serrate, 7-15 cm. long, pale beneath ; racemes solitary, 

 .flexuous or drooping ; bracts longer than the flowers ; filaments and pods hairy. 

 Woods in the Alleghenies, Va. to Ga. July, Aug. 



2. CHIMAPHILA Pursh. PIPSISSEWA 



Petals 5, concave, orbicular. Stamens 10 ; filaments enlarged and hairy in 

 the middle ; anthers as in Pyrola, but more or less conspicuously 2-horned. 

 Style nearly immersed in the depressed summit of the globular ovary ; stigma 



