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Key to families | Table of families and genera
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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, , 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.
± 30 genera, 600 species: especially northern temperate, arctic, alpine; some cultivated (Bergenia, Darmera, Heuchera, Saxifraga, Tellima, Tolmiea). [Soltis et al. 2001 Ann Missouri Bot Gard 88:669–693; Okuyama et al. 2008 Molec Phylogen Evol 46:560–575] California Mitella moved to Mitellastra, Ozomelis, Pectiantia; Suksdorfia ranunculifolia to Hemieva. Parnassia moved to Parnassiaceae. —Scientific Editor: Bruce G. Baldwin.
Unabridged references: [Soltis 1988 Syst Bot 13:64–72]
Key to Saxifragaceae
Plant generally ± hairy, often glandular; caudex or rhizome generally not woody, generally scaly. Leaf: blade obovate to round, base tapered to reniform or cordate, margin lobed. Inflorescence: raceme or panicle; flowers 1–many; bracts scale-like. Flower: hypanthium free or ± fused to ovary; [petals sometimes spotted]; stamens 10, filaments generally flat; pistil 1, ovary superior to ± inferior (sometimes more superior in fruit), chambers 2, placentas 2, axile, styles 2, free throughout. Fruit: capsule.Key to Saxifraga
± 300 species: cool northern temperate, boreal, arctic. (Latin: rock-breaking) Saxifraga stolonifera W. Curtis cultivated only. Other taxa in TJM (1993) moved to Cascadia, Micranthes.
Caudex fragile; bulblets 0. Leaf: basal and cauline, < 3 cm, smaller upward; petiole 5–25 mm; blade generally 5–8 mm, wider than long, divided > 1/2 to base, base ± shallowly reniform; lobes 3–5, ± round to elliptic. Inflorescence: raceme; flowers generally few. Flower: sepals erect, generally < petals, elliptic to ovate; petals 2–6 mm, elliptic to ± obovate; filaments thread-like, slightly widened at base; ovary > 1/2-inferior, more superior in fruit.
2n=26. Uncommon. Moist crevices, shaded rocky areas; 3000–4500 m. c&s High Sierra Nevada; sporadic to arctic, Colorado, Arizona, circumboreal. [Saxifraga rivularis L., misappl.] Jul–Aug [Online Interchange]
Previous taxon: Saxifraga cespitosa
Next taxon: Saxifraga mertensiana
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Aug 30 2015
Citation for this treatment: [Author of taxon treatment] 2013. Saxifraga, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=43367, accessed on Aug 30 2015
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|Geographic subdivisions indicated for the distribution of Saxifraga hyperborea|| 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.
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(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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