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Key to MicranthesView taxon page for Micranthes
(For a list of species in Micranthes, use the above link.) Jepson Manual glossary definitions can be seen by moving your cursor over words underlined with dots. 1. Leaves cauline on ± trailing stem – blade Expanded portion of a leaf, petal, or other structure, generally flat but sometimes rolled, cylindric, wavy, or cupped. entire Having margins that are continuous and smooth (i.e., without teeth, lobes, etc.). ; flowers in head-like cluster ..... M. tolmiei 1' Leaves basal At or near the base of a plant or plant part. Especially said of leaves clustered near the ground or of a placenta confined to the base of an ovary. (bracts occasionally leaf-like) 2. Proximal flowers replaced by bulblets 1. Small bulb generally produced at the base of a bulb. 2. Any small, bulb-like structure that propagates a plant, often in a leaf or bract axil. ; flowers ± bilateral Divisible into mirror-image halves in only one way. , 3 petals broader than other 2 3. Base of all petals ± 2-spotted; leaf Organ arising from a stem, generally composed of a stalk (petiole) and a flat, expanded, green, photosynthetic area (blade); distinguished from a leaflet by the presence in its axil of a bud, branch, thorn, or flower; sometimes with lateral, basal appendages (stipules); either simple (toothed, lobed, or dissected but not divided into leaflets) or compound (divided into leaflets). blade linear-elliptic, margin ± entire or with minute teeth distally ..... M. bryophora 3' Base of only 3 broad petals (rarely all) ± 2-spotted; leaf blade obovate, teeth generally coarse ..... M. ferruginea 2' Inflorescence bulblets 0; flowers radial Divisible into mirror-image halves in three or more ways. , petals ± equal 4. Filaments inflated distally; petal spots 2 5. Leaf blade ovate Egg-shaped (i.e., widest below the middle) in two dimensions (i.e., in one plane), as a leaf. to elliptic In the shape of a flattened circle or ellipse; wider than linear , base truncate Abruptly (not gradually) narrower or smaller at base or tip, as if cut straight across or nearly so. to tapered Gradually (not abruptly) narrower or smaller at base or tip. ; ovaries fused only at base ..... M. marshallii 5' Leaf blade ± round, base cordate Heart-shaped; often pertaining to a leaf in which the blade base on both sides of the petiole is rounded and convex. to reniform Kidney-shaped; often pertaining to a leaf in which the blade base on both sides of the petiole is rounded and concave. ; ovaries fused throughout – fruit tip purple, base yellow-banded ..... M. odontoloma 4' Filaments inflated proximally, or ± flat and not inflated; petal spots 0 6' Filaments not inflated proximally, ± flat, narrowed at tip; ovary ± inferior to 1/2-inferior in flower, superior in fruit 7. Plant generally > 4 dm; leaf blade linear Elongate, with nearly parallel sides; narrower than elliptic or oblong. to oblanceolate, generally > 10 cm, long-tapered to an indistinct petiole Leaf stalk, connecting leaf blade to stem; sometimes more or less indistinct. ; bogs, marshes, lake margins ..... M. oregana 7' Plant <= 3.5 dm; leaf blade elliptic, obovate, ovate, or triangular, generally < 10 cm, short-tapered to a distinct petiole; not in bogs, marshes or lake margins 8. Leaf blade shallowly toothed; inflorescence ± open, often 1-sided; flowers not clustered to loosely clustered; anthers purple to red (orange); petals ± 2 × sepals; styles on fruit generally > 1.5 mm ..... M. californica 8' Leaf blade ± entire to minutely toothed; inflorescence not 1-sided; flowers loosely to densely clustered; anthers generally yellow to orange; petals < 1.7 × sepals; styles on fruit generally < 1 mm 9. Petals 1–2 mm; sepals ± reflexed Abruptly bent or curved downward or backward. ..... M. nidifica 9' Petals generally > 2 mm; sepals generally ± erect Upright; vertically oriented. to spreading Oriented more or less perpendicularly to the axis of attachment; often, more or less horizontal. (except Micranthes fragosa) 10. Pedicels ± glabrous to sparsely glandular; generally 1 head-like cluster of flowers at tip of inflorescence, sometimes with 1 or 2 smaller clusters on nearby short lateral branches; moist, sandy and gravelly montane to subalpine habitats >= 1600 m elevation ..... M. aprica 10' Pedicels densely glandular; lateral branches of inflorescence many, each with a terminal cluster of flowers; moist meadows, rocky slopes and outcrops 11. Lateral branches of inflorescence spreading to ascending Curving or angling upward from base, or about 30-60 degrees less than vertical or away from axis of attachment. ; inflorescence cluster at tip of main axis open to ± congested, hemispheric to ± flat-topped; sepals ± reflexed to spreading ..... M. fragosa 11' Lateral branches of inflorescence ascending to erect; inflorescence cluster at tip of main axis dense, conical to cylindric Elongate, with parallel sides and, at any point, round in transverse section. ; sepals ± erect to ascending ..... M. integrifolia
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Citation for the whole project: Jepson Flora Project (eds.) . Jepson eFlora, https://ucjeps.berkeley.edu/eflora/ [accessed on ]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on .
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