Saxifraga L.
  • Sp. Pl. 1: 398. 1753. (1 May 1753)
  • Saxifrage [Latin saxum, rock, and frango, to break, alluding to growth in rock crevices and/or medical use for kidney stones]

Cite taxon page as 'WFO (2021): Saxifraga L. Published on the Internet; Accessed on: 21 Sep 2021'

General Information

Herbs perennial (biennial in S. adscendens, annual in S. tridactylites), sometimes rhizomatous, sometimes stoloniferous; caudex not fleshy, scaly, sometimes with bulbils; herbage hairy or stipitate-glandular, sometimes glabrous. Flowering stems ± erect, leafy, 1-40[-100] cm. Leaves in basal rosette and cauline, alternate (opposite in S. nathorstii, S. oppositifolia), cauline reduced; stipules absent; petiole absent or present; blade obovate, oblong, oblong-obovate, elliptic, linear, spatulate, or oblanceolate to ovate, reniform, or round, lobed or unlobed, base cuneate to cordate, ultimate margins entire, crenate, serrate, or dentate, (with lime-secreting hydathodes in S. aizoides, S. nathorstii, S. oppositifolia, S. paniculata), apex acute to obtuse or rounded; venation pinnate or palmate. Inflorescences thyrses or, sometimes, cymes, sometimes solitary flowers, terminal from terminal bud in rosette, 2-200[-1000]-flowered, (some or all flowers replaced by bulbils in S. cernua, S. mertensiana), usually bracteate (ebracteate in S. nathorstii, S. oppositifolia); (bracts leaflike). Flowers [bilaterally symmetric], bisexual (unisexual and plants sometimes gynodioecious, or plants dioecious in S. eschscholtzii); hypanthium free from or 1/4-3/4 adnate to ovary, free from ovary to 0.5 mm, green or pink to purple, (0.1-4 mm); sepals 5, green, sometimes reddish at tips, sometimes ± purple; petals absent or (1-)5, white, cream, yellow, orange, red, pink, or purple, often yellow-, orange-, or red-spotted; nectary disc present or not; stamens 10, (distinct); filaments linear and ± flattened (club-shaped in S. mertensiana); ovary superior to ± inferior, sometimes appearing more superior in fruit, 2-locular, carpels usually (1/4-)1/2 connate proximally or ± distinct; placentation axile (when connate 1/2+ their length) or appearing marginal; styles 2; stigmas 2. Capsules 2(-3)-beaked (± folliclelike in S. oppositifolia). Seeds brown, oblong, ellipsoid, or ovoid, smooth, tuberculate, or papillate. x = 6, 8, 11, 13, 14.

  • Provided by: [A].Flora of North America @
    • Source: [
    • 1
    • ]. 

    Herbs perennial, rarely annual or biennial. Stem cespitose or simple. Leaves both basal and cauline, petiolate or not; leaf blade simple, entire, margin dentate or lobate; cauline leaves usually alternate, rarely opposite. Inflorescence a solitary flower or few- to many-flowered cyme, bracteate. Flowers usually bisexual, sometimes unisexual, actinomorphic, rarely zygomorphic; receptacle cyathiform or saucer-shaped. Sepals (4 or)5(or 7 or 8). Petals (4 or)5, yellow, orange, white, or red to purple, callose or not, distinctly veined, margin usually entire. Stamens (8 or)10; filaments subulate or clavate. Carpels 2, usually connate at least in placental region; ovary superior to inferior, usually 2-loculed; placentation usually axile; ovules many; integuments 1 or 2; nectary disc sometimes well developed, annular or semiannular. Fruit a 2-valved capsule. Seeds many.

  • Provided by: [C].Flora Of CHina @
    • Source: [
    • 2
    • ]. 

    "Fls perfect, regular or slightly irregular, 5-merous; hypanthium usually adnate to the base of the carpels, sometimes essentially free; pet mostly narrow; stamens 10; carpels mostly 2, connate at least at the base, with axile placentas, ripening into a bilobed capsule or nearly distinct follicles; perennial herbs with the principal lvs usually in basal rosettes or crowded on basal shoots, the flowering stem commonly with few or no lvs, the fls mostly in branched, cymose or cymose-paniculate infls, rarely solitary and terminal. (Antiphylla, Chondrosea, Hydatica, Leptasea, Micranthes) 350, Arctic, N. Temp., Andes."

  • Provided by: [B].New York Botanical Garden
    • Source: [
    • 3
    • ]. 


    SELECTED REFERENCES Calder, J. A. and D. B. O. Savile. 1959b. Studies in Saxifragaceae--II. Saxifraga sect. Trachyphyllum in North America. Brittonia 11: 228-249. Elvander, P. E. 1984. The taxonomy of Saxifraga (Saxifragaceae) section Boraphila subsection Integrifoliae in western North America. Syst. Bot. Monogr. 3: 1-44. Jørgensen, M. H. et al. 2006. Taxonomy and evolutionary relationships in the Saxifraga rivularis complex. Syst. Bot. 31: 702-729. Webb, D. A. and R. J. Gornall. 1989. A Manual of Saxifrages and Their Cultivation. Portland.

  • Provided by: [A].Flora of North America @
    • Source: [
    • 1
    • ]. 

    Included Species

    Other Local Names

    Saxifrage [Latin saxum, rock, and frango, to break, alluding to growth in rock crevices and/or medical use for kidney stones]

     Information From

    Flora of North America @
    'Flora of North America @ eFloras (2008). Published on the Internet [accessed August 2016]' Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
    • A Flora of North America Association
    New York Botanical Garden
    Descriptions of plants should be attributed to the full citation for each individual article, chapter or book that is the source for each record, which should include the authors of original publication.
    • B Content licensed under Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License
    Flora Of CHina @
    'Flora of China @ eFloras (2008). Published on the Internet [accessed August 2016]' Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
    • C Missouri Botanical Garden
    • D CC0 1.0 Universal (CC0 1.0).
    World Flora Online consortium
    World Flora Online Data. 2018.
    • E CC0 1.0 Universal (CC0 1.0).