ERIC'ACEAIS (HEATH FAMILY^ 627 



+f-++ Corolla nrceolate to cyHndrical, !5-toothert ; not lieath-llke. 



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



nyiindraceous. Capsule depressed, 5-lobed, the valves eiitiro. 



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



presst'd-fjlobose to obovoid, not thickened at the sutures. Seeds mostly banging on the 

 central placenta. 



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



sutures with corky or spongy thickenings. 



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



Capsule splitting wlien 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. 



^- +- 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-a\vned at top. 



Tribe UI. ARBtlTEAE. Fruit indehiscent, a berry or drupe. Corolla deciduous. 

 28. Arctostaphylos. Corolla urn-shaped. Drupe berry-Uke, 5-10-seedea. 



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



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



Subfamily IV. VACCINOfDEAE (Whorti.eberky 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. CMogenes. 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, with a single ovule in each cell. Fruit a berry-like drupe 



with 10 small seed-like nutlets. 



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



Anther-cells tapering upward into a tube. 



1. CL^THRA [Groiiov.] 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 flovirers in terminal hoary racemes. Bracts deciduous. 

 (KXiiSpa, the ancient Greek name of the Alder, which this genus somewhat 

 resembles in foliage.) 



1. C. alnifdlia L. (Sweet Pupperbush.) Shrub 1-3 m. high ; leaves 3. b-1 

 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. — 

 AVet 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 AUeghenies, Va. to Ga. July, Aug. 



2. CHIMAPHILA Pursh. Pipstssewa 



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 



