ERICACEAE. (HEATH FAMILY.) 287 



Suborder I. VACCIIVIEJE. 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-celIed, with a single ovule in each cell. Fruit a berried 



drupe with 8 or 10 small seed-like nutlets. 



2. Vacciniuni. 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. EKK I\E.£. Proper Heath Family. 



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

 petalous, hypogynous. — Shrubs or small trees. 



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



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



Tribe II. AXDROMEDE.E, Fruit a loculicidal pod. Corolla deciduous. 



# Anthers upright in the bud. Corolla monopetalous. 



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



5. Epigrea. Corolla salver-sbaped. Calyx of 5 separate dry and pointed sepals. 



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

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



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



++ •*-+ Calyx dry, not becoming fleshy after flowering. 



7. Leucothoe. Calyx imbricated in 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-clefL 



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. ERICEiE. Corolla persistent, becoming scarious after flowering. 



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



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



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



— Flowers not from scaly buds -, the bracts leaf-like or coriaceous. 



14. PhyTlodoce. 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. 



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

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

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



