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.
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. 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 odontoloma (Piper) A. Heller
NATIVE Habit: Plants 20--50 cm; caudex producing rhizomes; bulblets 0. Leaf: 4--40 cm; petiole 2--30 cm, base generally +- expanded, sheathing, membranous; blade +- round, base cordate to reniform, teeth coarse, sharp. Inflorescence: open. Flower: sepals reflexed, generally +- = petals, ovate to elliptic; petals 3--4.5 mm, round to elliptic, 2-spotted, ephemeral; filaments club-shaped; nectaries band-like; pistil 1, ovary superior, placentas proximally axile and distally marginal in ovary lobes. Fruit: capsule, follicle-like. Chromosomes: 2n=48. Ecology: Wet meadows, ledges; Elevation: > 1500 m. Bioregional Distribution: KR, NCoRH, CaRH, SNH, SnBr; Distribution Outside California: to British Columbia, Montana, New Mexico. Flowering Time: Jul--Aug Note: Can be confused with Saxifraga mertensiana Bong., which has 2° leaf teeth and often reduced cauline leaves present. Synonyms: Saxifraga odontoloma Piper Jepson eFlora Author: Michael S. Park Reference: Elvander 1984 Syst Bot Monogr 3:1--44 Index of California Plant Names (ICPN; linked via the Jepson Online Interchange) Previous taxon: Micranthes nidifica Next taxon: Micranthes oregana
Botanical illustration including Micranthes odontoloma
Citation for this treatment: Michael S. Park 2012, Micranthes odontoloma, in Jepson Flora Project (eds.) Jepson eFlora, https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=33445, accessed on April 25, 2024.
Citation for the whole project: Jepson Flora Project (eds.) 2024, Jepson eFlora, https://ucjeps.berkeley.edu/eflora/, accessed on April 25, 2024.
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Blue line denotes eFlora flowering time (fruiting time in some monocot genera).