ERICACEAE. (HEATH FAMILY.) 287 



SUBORDER I. VACCINIE JE. 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. 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 or 10 small seed -like nutlets. 



2. Vacciiiium. Berry 4 - 5-celled (or imperfectly 8 - 10-celled by false partitions), many- 



seeded. Anther-cells tapering upward into a tube. 



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



into a tube, but each 2-pointed. 



SUBORDER II. EKICINE JE. PROPER HEATH FAMILY. 



Calyx free from the ovary. Corolla monopetalous, or sometimes poly- 

 petalous, hypogynous. Shrubs or small trees. 



Tribe I. ARBUTEJE. Fruit indehiscent, a berry or drupe. Corolla deciduous. 



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



Tribe II. ANDROMEDE^E. Fruit a loculicidal pod. Corolla deciduous. 



* Anthers upright in the bud. Corolla monopetalous. 

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



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



*- *- Anther-cells opening only at the top. Corolla not salver-shaped. 

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



6. Gaul theria. Calyx 5-cleft, in fruit enclosing the small pod. Anthers 4-awned at the top. 



M- ++ Calyx dry, not becoming fleshy after flowering. 



7. Leucothoe. Calyx imbricated hi the bud. Corolla cylindraceous, 5-toothed. Pod 



depressed, 5-lobed, the valves entire. 



8. Cassandra. Calyx imbricated in the bud. Corolla cylindraceous, 5-toothed. Pod 



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



9. Cassiope. Calyx imbricated. Corolla broadly campanulate, deeply 4-5-cleft. Pod 



globular-ovoid, 4- 5-valved, the valves 2-cleft. 



10. Andromeda. Calyx valvate and very early open in the bud. Pod globular. Seeds 



mostly hanging on the central placenta. 



11. Oxydendrum. Calyx valvate and opening early in the bud. Pod oblong-pyramidal. 



Seeds all ascending. 



* * Anthers turned over outwardly in the bud. Corolla of 5 separate petals. 



12. Clethra. Sepals 5 Stamens 10: anther-cells opening by a terminal hole or chink. 



Style 3-cleft at the apex. Pod 3-valved. 

 Tribe III. ERICEJE. Corolla persistent, becoming scarious after flowering. 



13. Calluna. Corolla bell-shaped, 4-parted Pod opening septicidally. 



Tribe IV. RHODOREJE. Fruit a septicidal pod. Corolla deciduous. 



* Anther-cells opening by a hole or chink at the top. 

 *- Flowers not from scaly bu<1s 5 the bracts leaf-like or coriaceous. 



14. Phyllodoce. Corolla ovate or urn-shaped. Leaves narrow and heath-like. 



15. Kalmia. Corolla broadly bell-shaped or wheel-shaped, with 10 pouches receiving as 



many anthers. Leaves oblong or linear. 



4- - Flowers developed from large scaly buds, the scales or bracts caducous. 

 16 Menziesia. Corolla globular-bell-shaped, 4-toothed. Stamens 8. Leaves deciduous. 

 17. Azalea. Corolla open funnel-form, 5-lobed. Stamens 5. Leaves deciduous. 



