Directory       News       Site Map       Home
    Jepson eFlora: Taxon page
Key to families | Table of families and genera

Previous taxon Indexes to all accepted names and synonyms:
| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
Previous taxon


Gary D. Wallace, except as noted

Perennial herb, shrub, tree. Stem: bark often peeling distinctively. Leaf: simple or 0, generally cauline, alternate, opposite (whorled), evergreen or deciduous, often leathery, petioled or not; stipules 0. Inflorescence: raceme, panicle, cyme, or flowers 1, terminal or axillary, generally bracted; pedicel often with 2 bractlets. Flower: generally bisexual, generally radial, bell-shaped, cylindric, or urn-shaped; sepals generally (0)4–5, generally free; petals generally (0)4–5, free or fused; stamens (2–5)8–10, free, filaments rarely appendaged, anthers dehiscing by pores or slits, awns 0 or 2(4), seemingly abaxial, reduced or elongate, generally curved; nectary generally present at ovary base, generally disk-like; ovary superior or inferior, chambers generally 1–5, placentas axile or parietal, ovules 1–many per chamber, style 1, stigma head- to funnel-like or lobed. Fruit: capsule, drupe, berry. Seed: generally many, winged or not.
± 100 genera, 3000 species: generally worldwide except deserts; some cultivated, especially Arbutus, Arctostaphylos, Rhododendron, Vaccinium. [Kron et al. 2002 Bot Rev 68:335–423] Monophyletic only if Empetraceae included, as treated here. Ledum included in Rhododendron. Non-green plants obtain nutrition from green plants through fungal intermediates. —Scientific Editors: Gary D. Wallace, Thomas J. Rosatti.

Key to Ericaceae

Shrub, small, glabrous to hairy. Stem: decumbent or prostrate, often rooting. Leaf: opposite, appressed, evergreen, leathery or thin. Inflorescence: flowers 1 in upper leaf axils; bracts 0; pedicel jointed to flower, bractlets 4–6. Flower: sepals 4–5, free; petals 4–5, ± 2/3 fused, generally white; stamens 10, anthers dehiscing by gaping pores, awns elongate; ovary superior, chambers 5, placentas near top. Fruit: capsule, loculicidal. Seed: several per chamber.
± 14 species: southern and eastern Asia, North America. (Greek: mother of Andromeda)

C. mertensiana (Bong.) G. Don WHITE HEATHER
Plant low, densely branched. Stem: < 3 dm, glabrous or finely hairy. Leaf: sessile, overlapping, 2–5 mm, boat-shaped, elliptic, concave, leathery, glabrous, abaxially not grooved; margin entire, ciliate, or minutely glandular, not rolled under. Inflorescence: pedicel glabrous or hairy. Flower: corolla widely bell-shaped, white, lobes 5; filaments glabrous.
Moist, subalpine slopes, around rocks, areas of late snow; 1800–3505 m. Klamath Ranges, High Cascade Range, High Sierra Nevada; to Alaska, western Canada, Montana. If recognized taxonomically, plants with leaf 3–5 mm, margin minutely glandular-ciliate, in southern High Cascade Range (Lassen Peak), High Sierra Nevada, assignable to Cassiope mertensiana subsp. californica Piper, plants with leaf 2–3 mm, margin with white, ephemeral hairs, in Klamath Ranges, assignable to Cassiope mertensiana subsp. ciliolata Piper. Jul–Aug [Online Interchange]

Previous taxon: Cassiope
Next taxon: Chimaphila


Name search

Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora,, accessed on Nov 27 2015
Citation for this treatment: [Author of taxon treatment] 2013. Cassiope, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on Nov 27 2015

Copyright © 2014 Regents of the University of California
We encourage links to these pages, but the content may not be downloaded for reposting, repackaging, redistributing, or sale in any form, without written permission from The Jepson Herbarium.

click for enlargement Cassiope mertensiana
See CalPhotos for additional images
1991 Gary A. Monroe

Geographic subdivisions indicated for the distribution of Cassiope mertensiana Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

View elevation by latitude chart
Data provided by the participants of the Consortium of California Herbaria.
View all CCH records


CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.