Jepson Flora Project: Jepson Interchange    

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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
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Gary D. Wallace, except as specified

Perennial, shrub, tree
Stem: bark often peeling distinctively
Leaves simple, generally cauline, alternate, opposite, rarely whorled, evergreen or deciduous, often leathery, petioled or not; stipules 0
Inflorescence: raceme, panicle, cyme, or flowers solitary, generally bracted; pedicels often with 2 bractlets
Flower generally bisexual, generally radial; sepals generally 4–5, generally free; petals generally 4–5, free or fused; stamens 8–10, free, filaments rarely appendaged, anthers awned or not, dehiscent by pores or slits; nectary generally at ovary base, 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
Seeds generally many, sometimes winged
Genera in family: ± 100 genera, 3000 species: generally worldwide except deserts; some cultivated, especially Arbutus, Arctostaphylos, Rhododendron, Vaccinium
Reference: [Wallace 1975 Wasmann J Biol 33:1–88; 1975 Bot Not 128:286–298]
Subfamilies Monotropoideae, Pyroloideae, Vaccinioideae sometimes treated as families. Nongreen plants obtain nutrition from green plants through fungal intermediates.



Shrub, small, glabrous to hairy
Stem decumbent or prostrate, often rooting
Leaves opposite, appressed, evergreen, leathery or thin
Inflorescence: flowers solitary in upper leaf axils; bracts 0; bractlets 4–6; pedicels jointed to flower
Flower: sepals 4–5, free; petals 4–5, ± 2/3 fused, generally white; stamens 10, anthers dehiscent by gaping pores, awns elongate; ovary superior, chambers 5, placentas near top
Fruit: capsule, loculicidal
Seeds several per chamber
Species in genus: ± 14 species: s&e Asia, North America
Etymology: (Greek: mother of Andromeda)


C. mertensiana (Bong.) Don


Plant low, densely branched
Stem < 3 dm, glabrous or finely hairy
Leaf ± peltate, 2–5 mm, boat-shaped, elliptic, concave, leathery, glabrous; lower surface not grooved; margin entire, ciliate or minutely glandular, not rolled under
Inflorescence: pedicels glabrous or hairy
Flower: corolla widely bell-shaped, white, lobes 5; filaments glabrous
Ecology: Moist, subalpine slopes, around rocks and areas of late snow
Elevation: 1800–3505 m.
Bioregional distribution: Klamath Ranges, High Cascade Range, High Sierra Nevada
Distribution outside California: to Alaska, w Canada, Montana
Plants have been assigned to subsp. californica Piper [leaf 3–5 mm, margin minutely glandular-ciliate; s CaRH (Lassen Peak), SNH] or subsp. ciliolata Piper [leaf 2–3 mm, margin with white, ephemeral hairs; KR], but study needed
Horticultural information: IRR: 1, 2 &SHD: 6, 7, 14, 15, 16, 17; SUN: 4, 5; DFCLT.

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bioregional map for CASSIOPE%20mertensiana being generated
YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps).

Retrieve Jepson Interchange Index to Plant Names entry for Cassiope mertensiana
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