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Tiarella trifoliata var. trifoliata

Higher Taxonomy
Family: SaxifragaceaeView DescriptionDichotomous Key

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: TiarellaView Description 

Common Name: SUGAR-SCOOP
Habit: Plant hairy, glands few; rhizome scaly; bulblets 0. Leaf: simple or compound, basal and cauline, distal reduced; stipules minute on cauline leaves, membranous, with marginal bristles; blade ovate, base cordate, lobes 3--5, +- deep, or leaflets 3, teeth sharp. Inflorescence: generally raceme-like panicle. Flower: hypanthium minute, free of ovary; petals thread-like; stamens 10; pistil 1, ovary superior, chamber 1, placentas 2, parietal. Fruit: capsule, valves unequal.
Species In Genus: 2 species: North America, Asia. Etymology: (Greek: small tiara)
Reference: Kern 1966 Madroño 18:152--160
Species: Tiarella trifoliataView Description 

Common Name: LACE FLOWER
Habit: Plant 15--40 cm. Leaf: stipules on basal leaves < 1 cm, on cauline leaves < 1 mm; petiole > blade. Inflorescence: glandular hairs dense. Flower: calyx lobes 1.5--2.5 mm; petals 3--4 mm.

Tiarella trifoliata L. var. trifoliata
Leaf: generally 3--9 cm wide; leaflets stalked, shallowly lobed, teeth sharp.
Ecology: Moist shady streambanks; Elevation: < 1500 m. Bioregional Distribution: KR (Humboldt Co., expected elsewhere), n NCoRO; Distribution Outside California: to Alaska, eastern British Columbia, Montana. Flowering Time: Jun--Aug
eFlora Treatment Author: Michael S. Park & Patrick E. Elvander
Reference: Kern 1966 Madroño 18:152--160
Jepson Online Interchange
Listed on CNPS Rare Plant Inventory

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botanical illustration including Tiarella trifoliata var. trifoliata


Citation for this treatment: Michael S. Park & Patrick E. Elvander 2012, Tiarella trifoliata var. trifoliata, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on July 23, 2018.

Citation for the whole project: Jepson Flora Project (eds.) 2018, Jepson eFlora,, accessed on July 23, 2018.

Tiarella trifoliata var. trifoliata
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© 2014 Barry Rice
Tiarella trifoliata var. trifoliata
click for enlargement
© 2016 California Academy of Sciences
Tiarella trifoliata var. trifoliata
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© 2009 Barry Breckling

More photos of Tiarella trifoliata var. trifoliata in CalPhotos

Geographic subdivisions for Tiarella trifoliata var. trifoliata:
KR (Humboldt Co., expected elsewhere), n NCoRO;
Markers link to CCH specimen records. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues. Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
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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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.