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Ericaceae

Flowers: Perfect, actinomorphic (slightly zygomorphic in Rhododendron), often urceolate or campanulate; anthers often appendaged & opening by pores; carpels syncarpous; ovary superior or inferior, as many locules as carpels; ovules numerous, axile; style hollow; pollen often in tetrads

Inflorescences: Various

Fruits: Capsules, berries, or drupes

Habit: Mainly small to large shrubs, evergreen or deciduous; prefers acid soil

Leaves: Alternate, simple, mostly entire, often thick, leathery, evergreen; no stipules

Examples:
Arbutus (madrone)
Erica and Calluna (heathers)
Kalmia (mountain laurels)
Oxydendrum arboreum (sourwood)
Pieris (fetterbush)
Rhododendron (rhododendron, azaleas)

rhododendrons are usually evergreen while azaleas are mostly deciduous (exceptions to both do occur)
Arctostaphylos uva ursi (bearberry)
Vaccinium (blueberry, cranberry)

Pyrola (wintergreen) and Chimaphila (pipsissewa) are often placed in a separate family, Pyrolaceae

Monotropa uniflora (Indian pipe) and related genera, which are saprophytic, are often placed in a separate family, Monotropaceae