ERICACEAE (^HEATH FAMILY) 627 



++ ++ Corolla Qrceolate to cylindrical, 5-toothed ; not heath-like. 



16. Leucothoe. Calyx slig'htly or much imbricated, naked or bibracteate. Corolla ovoid or 

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



IT. 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. 



( apsiile splitting when 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. 



-t- -!- 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. ARBUTEAE. Fruit indehiscent, a berry or drupe. Corolla deciduous. 

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



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

 "2-1. Calluna. Corolla bell-shaped, -l-parted. Leaves minute, opposite, imbricate. 



Subfamily IV. VACCINOfDEAE (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 10-celled, ^vlth a single ovule in each cell. Fruit a berry-like drupe 



with 10 small seed-like nutlets. 



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



Anther-cells tapering upward into a tube. 



1. CL^THRA [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. 

 (KX^^pa, the ancient Greek name of the Alder, which this genus somewhat 

 resembles in foliage.) 



1. C. alnifblia L. (Sweet Pepperbush.) Shrub 1-3 m. high ; leaves 3.5-7 

 cm. long, rcedge-ohovate, sharply serrate, entire toward the base, prominently 

 straiiiht-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 ohlovg. 

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

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

 — Woods in the AUeghenies, 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 conspicuouslj'' 2-horned. 

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



