Jepson eFlora: Taxon page
Key to families | Table of families and genera
Previous taxon Index to 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 |
Next taxon
Rhododendron columbianum
WESTERN LABRADOR TEA

Higher Taxonomy
Family: EricaceaeView DescriptionDichotomous Key

Common Name: HEATH FAMILY
Habit: 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.
Genera In Family: +- 100 genera, 3000 species: generally worldwide except deserts; some cultivated, especially Arbutus, Arctostaphylos, Rhododendron, Vaccinium. Note: Monophyletic only if Empetraceae included, as treated here. Ledum included in Rhododendron. Non-green plants obtain nutrition from green plants through fungal intermediates.
eFlora Treatment Author: Gary D. Wallace, except as noted
Scientific Editor: Gary D. Wallace, Thomas J. Rosatti.
Genus: RhododendronView DescriptionDichotomous Key

Habit: Shrub to tree, glabrous, hairy, and/or with glandular scale-like hairs. Stem: prostrate to erect, bark thin, sometimes peeling or shredding. Leaf: alternate, evergreen or deciduous, ovate to obovate to elliptic, margin entire, flat to rolled under. Inflorescence: raceme, 1--many-flowered, bracts green to red-brown. Flower: sepals, petals generally 5, corolla radial to bilateral, 1--5 cm, petals free to +- fused, spots or blotch present or 0; anther awns 0; ovary superior. Fruit: capsule, septicidal, dehiscing base to tip or tip to base, placentas axile. Seed: many, fusiform, +- flat to not, wings and/or tails present or 0.
Species In Genus: +- 1000 species: northern hemisphere, tropical Asia, to Australia. Etymology: (Greek: rose tree)
eFlora Treatment Author: Kathleen A. Kron & Walter S. Judd

Rhododendron columbianum (Piper) Harmaja
NATIVE
Stem: erect, < 2 m, bark smooth, peeling or shredding in age or not, twigs with unicellular hairs, papillae, and/or +- flat glandular scales. Leaf: (1)2--8 cm, 1.5--3 cm wide, leathery, evergreen, margin flat or +- rolled under, abaxially with sparse to dense papillae, +- flat glandular scales, adaxially with scattered +- flat glandular scales and/or papillae. Inflorescence: +- rounded, bracts, bractlets with +- flat glandular scales, margins ciliate. Flower: corolla widely bell-shaped, white to cream; stamens (8)10, +- equal. Fruit: 8--10 mm wide, +- longer, dehiscing base to tip. Seed: +- fusiform, coat +- elongated beyond narrow end.
Ecology: Coast, higher elevations inland, bogs, stream margins, occasionally well-drained sites; Elevation: < 3630 m. Bioregional Distribution: NCo, KR, s NCoRO, CaRH, s SNF, SNH, CCo, SnFrB, n SCoRI, Wrn, SNE; Distribution Outside California: to British Columbia, Montana, Wyoming, Utah. Flowering Time: May--Aug
Synonyms: Ledum glandulosum Nutt.
eFlora Treatment Author: Kathleen A. Kron & Walter S. Judd
Jepson Online Interchange

Previous taxon: Rhododendron
Next taxon: Rhododendron macrophyllum

Name Search
botanical illustration including Rhododendron columbianum

Contact/Feedback

Citation for this treatment: Kathleen A. Kron & Walter S. Judd 2016. Rhododendron columbianum, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=91858, accessed on February 06, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on February 06, 2016.


Rhododendron columbianum
click for enlargement
© 2011 Julie Kierstead Nelson
Rhododendron columbianum
click for enlargement
© 2005 Steve Matson
Rhododendron columbianum
click for enlargement
© 2015 Neal Kramer
Rhododendron columbianum
click for enlargement
© 2015 Neal Kramer
Rhododendron columbianum
click for enlargement
© 2009 Keir Morse
Rhododendron columbianum
click for enlargement
© 2012 Len Lindstrand III

More photos of Rhododendron columbianum in CalPhotos


Geographic subdivisions for Rhododendron columbianum:
NCo, KR, s NCoRO, CaRH, s SNF, SNH, CCo, SnFrB, n SCoRI, Wrn, SNE;
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.
READ ABOUT YELLOW FLAGS
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.