Micranthes oregana

(Howell) Small in N. L. Britton et al.

in N. L. Britton et al., N. Amer. Fl. 22: 138. 1905 ,.

Common names: Oregon or bogsaxifrage
Basionym: Saxifraga oregana Howell Erythea 3: 34. 1895
Synonyms: Saxifraga montanensis Small Saxifraga oregana var. montanensis (Small) C. L. Hitchcock
Treatment appears in FNA Volume 8. Treatment on page 67. Mentioned on page 51, 70.

Plants solitary or in clusters, with caudex or thick, fleshy rhizomes. Leaves basal; petiole indistinct, flattened, 3–10 cm; blade linear to oblanceolate, 6–25 cm, fleshy, base cuneate, margins serrulate to denticulate, ciliate, surfaces glabrous or sparsely hairy. Inflorescences (30–) 50+-flowered, open to ± crowded, conic to cylindric thyrses, 25–125 cm, hairy proximally, yellow to pink-tipped stipitate-glandular distally. Flowers: sepals reflexed, ovate to triangular; petals white, not spotted, broadly elliptic to obovate and 2 times as long as sepals, sometimes oblanceolate and equaling or shorter than sepals, clawed, 2–5 mm; filaments linear, flattened; pistils connate to 1/2 their lengths; ovary 1/2+ inferior, often appearing superior in fruit. Capsules green to reddish purple, folliclelike. 2n = 38, 76.


Phenology: Flowering early spring–summer.
Habitat: Bogs, marshes
Elevation: 100-2500 m

Distribution

V8 128-distribution-map.gif

Alta., Calif., Colo., Idaho, Mont., Nev., Oreg., Wash.

Discussion

In both habitat and morphology, Micranthes oregana is similar to M. pensylvanica. A thorough investigation of the two species, especially the populations in Colorado that are disjunct from those in Montana, is needed to clarify relationships. The name Saxifraga integrifolia was misapplied to M. oregana by early California authors.

Selected References

None.

Lower Taxa

None.

"full" is not a number."thick" is not a number.

... more about "Micranthes oregana"
epigynous +, perigynous +  and hypogynous +
palmate +  and pinnate +
acute +  and obtuse or rounded +
Luc Brouillet +  and Patrick E. Elvander† +
(Howell) Small in N. L. Britton et al. +
cuneate +
Saxifraga oregana +
dentate +, serrate +  and entire +
glandular-ciliate +  and ciliate +
linear +  and oblanceolate +
6 cm60 mm <br />0.06 m <br /> (25 cm250 mm <br />0.25 m <br />) +
green;reddish purple +
3-carpellate +  and 2-carpellate +
connate +  and distinct +
Oregon or bogsaxifrage +
ebracteate +, bracteate +  and 2-300(-1000+)-flowered +
Alta. +, Calif. +, Colo. +, Idaho +, Mont. +, Nev. +, Oreg. +  and Wash. +
100-2500 m +
flattened +
bracteate +  and 2-70+[-1000]-flowered +
unisexual +  and bisexual +
2 cm20 mm <br />0.02 m <br /> (125 cm1,250 mm <br />1.25 m <br />) +
2-3(-4)-beaked +  and folliclelike +
Bogs, marshes +
multicellular +
glabrous +, stipitate-glandular +  and hairy +
purplish +  and green +
free +  and adnate +
0 cm0 mm <br />0 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
pink-tipped +, open +  and (30-)50+-flowered +
stipitate-glandular;hairy +
conic;cylindric +
25 cm250 mm <br />0.25 m <br /> (125 cm1,250 mm <br />1.25 m <br />) +
opposite +  and alternate +
serrulate +  and denticulate +
crassinucellate +, unitegmic +  and bitegmic +
epigynous +, perigynous +  and hypogynous +
purple-margined +
not spotted +  and white +
reddish purple +  and purple +
distinct +
2 times as long as sepals +
clawed +, oblanceolate +, broadly elliptic +  and obovate +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
peltate +  and jointed +
flattened +
3 cm30 mm <br />0.03 m <br /> (10 cm100 mm <br />0.1 m <br />) +
Flowering early spring–summer. +
2(-3)-carpellate +
0 +  and 1/2 +
unequal +
in N. L. Britton et al., N. Amer. Fl. +
straight +
muricate +, cellular-rugulose +, tuberculate +, pitted +, papillate +  and wrinkled +
ovoid +, ellipsoid +  and oblong +
reddish +  and green +
distinct +
ovate +  and triangular +
unbranched +  and branched +
persistent +
horizontal +  and erect +
2 +  and 3 +
connate +  and distinct +
hairy +  and glabrous +
Saxifraga montanensis +  and Saxifraga oregana var. montanensis +
Micranthes oregana +
Micranthes +
species +
dentate +, serrate +  and entire +
stoloniferous +  and rhizomatous +
annual +, biennial +  and perennial +