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Vascular Plants of California
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Micranthes californica


Higher Taxonomy
Family: SaxifragaceaeView DescriptionDichotomous Key
Common Name: SAXIFRAGE FAMILY
Habit: Perennial herb from caudex or rhizome, generally +- hairy. Stem: often +- leafy on proximal 1/2, rarely trailing and leafy throughout. Leaf: generally simple, basal and/or cauline, generally alternate, generally petioled; veins +- palmate. Inflorescence: raceme or panicle, generally +- scapose. Flower: generally bisexual, generally radial; hypanthium free to +- fused to ovary; calyx lobes generally 5; petals generally 5, free, generally clawed, generally white; stamens 3, [4], 5, 8, or 10; pistils 1 (carpels +- fused, ovary lobed, chambers 1 or 2, placentas generally 2(3), axile or parietal or occasionally proximally axile and distally marginal in ovary lobes) or 2 (carpels free, placentas marginal), ovary nearly superior to inferior, occasionally more superior in fruit, styles generally 2(3). Fruit: capsule (generally 2(3)-beaked, valves generally 2(3), generally equal) or 2 follicles. Seed: generally many, small.
Genera In Family: +- 30 genera, 600 species: especially northern temperate, arctic, alpine; some cultivated (Bergenia, Darmera, Heuchera, Saxifraga, Tellima, Tolmiea). Note: California Mitella moved to Mitellastra, Ozomelis, Pectiantia; Suksdorfia ranunculifolia to Hemieva. Parnassia moved to Parnassiaceae.
eFlora Treatment Author: Michael S. Park & Patrick E. Elvander, except as noted
Scientific Editor: Bruce G. Baldwin.
Genus: MicranthesView DescriptionDichotomous Key


Common Name: SAXIFRAGE
Habit: Plant generally +- hairy, often glandular; caudex or rhizome generally not woody, generally scaly. Leaf: basal (cauline); blade linear to (ob)ovate or +- round, base tapered to reniform, margin entire or toothed. Inflorescence: flowers few to many; bracts scale-like. Flower: generally radial; hypanthium free or +- fused to ovary; petals 5, white, sometimes with yellow spots at base; stamens 10, filaments flat or variously inflated; pistils 1 (chambers 2, placentas 2, axile or occasionally proximally axile and distally marginal) or 2, ovary superior to +- inferior (sometimes more superior in fruit), styles free throughout. Fruit: capsule or 2 follicles.
Species In Genus: +- 80 species: North America, Eurasia, South America, especially cool temperate northern hemisphere. Etymology: (Latin: small flower) Note: Intermediates common between Micranthes integrifolia, Micranthes nidifica, Micranthes fragosa, Micranthes aprica; some may be vegetatively reproducing, sterile hybrids. Study needed.
eFlora Treatment Author: Michael S. Park
Reference: Elvander 1984 Syst Bot Monogr 3:1--44
Unabridged Reference: Small & Rydberg 1905 N Am Fl 22:132--150
Micranthes californica (Greene) Small
NATIVE
Habit: Plant 15--35 cm; caudex generally with long slender rhizomes and bulblets. Leaf: 4--10 cm; petiole 2--5 cm; blade ovate, base tapered, teeth shallow, +- round or sharp. Inflorescence: often 1-sided, +- open. Flower: sepals generally reflexed, elliptic; petals 2.5--4.5 mm, >> sepals, elliptic to round; filaments +- flat, generally narrowed at tip; nectaries disk-like, lobed; pistils 2, ovary +- 1/2-inferior in flower. Fruit: 2 follicles. Chromosomes: 2n=20.
Ecology: Moist, shady places; Elevation: < 1200 m. Bioregional Distribution: KR, NCoRO, NCoRI, CaRF, SN (expected Teh), GV (Sutter to Stanislaus cos.), CW, SW; Distribution Outside California: southwestern Oregon, northwestern Baja California. Flowering Time: Feb--May(Jun) Note: Plants in far northern California difficult to assign; see Micranthes fragosa.
Synonyms: Saxifraga californica Greene
Jepson eFlora Author: Michael S. Park
Reference: Elvander 1984 Syst Bot Monogr 3:1--44
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Botanical illustration including Micranthes californica

botanical illustration including Micranthes californica

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Citation for this treatment: Michael S. Park 2012, Micranthes californica, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=91942, accessed on December 08, 2019.

Citation for the whole project: Jepson Flora Project (eds.) 2019, Jepson eFlora, http://ucjeps.berkeley.edu/eflora/, accessed on December 08, 2019.

Micranthes californica
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© 2017 Vernon Smith
Micranthes californica
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© 2016 Steve Matson
Micranthes californica
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© 2009 George W. Hartwell
Micranthes californica
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© 2015 Julie Kierstead Nelson
Micranthes californica
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© 2015 Julie Kierstead Nelson
Micranthes californica
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© 2007 George W. Hartwell

More photos of Micranthes californica in CalPhotos



Geographic subdivisions for Micranthes californica:
KR, NCoRO, NCoRI, CaRF, SN (expected Teh), GV (Sutter to Stanislaus cos.), CW, SW
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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).





 

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Data provided by the participants of the  Consortium of California Herbaria.
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All markers link to CCH specimen records. The original determination is shown in the popup window.
Blue markers indicate specimens that map to one of the expected Jepson geographic subdivisions (see left map). Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time.