Micranthes subapetala

(E. E. Nelson) Small in N. L. Britton et al.

in N. L. Britton et al., N. Amer. Fl. 22: 139. 1905 ,.

Common names: Yellowstone saxifrage
Basionym: Saxifraga subapetala E. E. Nelson Erythea 7: 169. 1899
Synonyms: Saxifraga oregana var. subapetala (E. E. Nelson) C. L. Hitchcock Saxifraga rydbergii Small ex Rydberg
Treatment appears in FNA Volume 8. Treatment on page 66. Mentioned on page 49, 51, 65, 67.

Plants solitary or in clumps, with bulbils on caudices. Leaves basal; petiole usually indistinct, flattened, ca. 2 cm; blade ovate or elliptic to oblanceolate, 3–15 cm, fleshy, base cuneate, margins entire or minutely denticulate, ciliate, surfaces hairy. Inflorescences 30+-flowered, ± constricted (spikelike) to ± open thyrses, 20–75 cm, yellow to pink (rarely purplish) tipped stipitate-glandular. Flowers: sepals reflexed, ovate; petals absent, sometimes 1–5, pink to purplish, not spotted, elliptic, clawed, 1–2 mm, shorter than sepals; filaments linear, flattened; pistils connate to 1/2 their lengths; ovary inferior. Capsules dark purple, valvate. 2n = 76.


Phenology: Flowering summer.
Habitat: Subalpine and alpine meadows, wet banks, ledges
Elevation: 1200-3000 m

Discussion

Although the species is usually distinctive, some populations of Micranthes subapetala in northern Wyoming appear more similar to M. hieraciifolia than to typical M. subapetala and may need to be re-evaluated. The distributional disjunction between the two taxa is about 1600 kilometers.

Selected References

None.

Lower Taxa

None.
... more about "Micranthes subapetala"
epigynous +, perigynous +  and hypogynous +
palmate +  and pinnate +
Luc Brouillet +  and Patrick E. Elvander† +
(E. E. Nelson) Small in N. L. Britton et al. +
cuneate +
Saxifraga subapetala +
dentate +, serrate +  and entire +
glandular-ciliate +  and ciliate +
elliptic +  and oblanceolate +
3 cm30 mm <br />0.03 m <br /> (15 cm150 mm <br />0.15 m <br />) +
2(-3)-beaked +  and folliclelike +
3-carpellate +  and 2-carpellate +
connate +  and distinct +
Yellowstone saxifrage +
ebracteate +, bracteate +  and 2-300(-1000+)-flowered +
Idaho +, Mont. +  and Wyo. +
1200-3000 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 +
Subalpine and alpine meadows, wet banks, ledges +
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 />) +
yellow to pink tipped +
stipitate-glandular +
20 cm200 mm <br />0.2 m <br /> (75 cm750 mm <br />0.75 m <br />) +
opposite +  and alternate +
denticulate +  and entire +
crassinucellate +, unitegmic +  and bitegmic +
epigynous +, perigynous +  and hypogynous +
purple-margined +
reddish purple +  and purple +
distinct +
1 +  and 5 +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
peltate +  and jointed +
flattened +
2 cm20 mm <br />0.02 m <br /> (?) +
Flowering 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 +
unbranched +  and branched +
persistent +
horizontal +  and erect +
2 +  and 3 +
connate +  and distinct +
Saxifraga oregana var. subapetala +  and Saxifraga rydbergii +
Micranthes subapetala +
Micranthes +
species +
dentate +, serrate +  and entire +
stoloniferous +  and rhizomatous +
annual +, biennial +  and perennial +