Heuchera micrantha var. micrantha

Endemic
Treatment appears in FNA Volume 8. Treatment on page 91.

Leaves: petiole glabrous or long-stipitate-glandular; blade orbiculate to pentagonal, shallowly lobed. Inflorescences glabrous or sparsely short to medium stipitate-glandular. Flowers: hypanthium obconic, 1.4–4.5 × 1–3.7 mm, short to long-stipitate-glandular; sepals 0.6–1.2 mm, apex rounded to acute; petals 0.2–0.7 mm wide; styles 1.6–3.1 mm. 2n = 28.


Phenology: Flowering May–Jun.
Habitat: Evergreen coniferous forests on basalt, schistose shale, metavolcanic, ultra basic, or serpentine-derived soils
Elevation: 10-1900 m

Distribution

V8 172-distribution-map.gif

Calif., Idaho, Oreg., Wash.

Discussion

Variety micrantha occurs in the Coast Range, Cascade Range, Blue and Klamath mountains, northern Sierra Nevada, and the Columbia River gorge, and on wooded banks of the Columbia and its tributaries.

Selected References

None.

Lower Taxa

None.

"full" is not a number.

epigynous +, perigynous +  and hypogynous +
rounded +  and acute +
Elizabeth Fortson Wells +  and Barbara Greene Shipes +
Douglas ex Lindley +
cordate +
not papillose +
dentate +, serrate +  and entire +
glandular-ciliate +  and ciliate +
lobed +, orbiculate +  and pentagonal +
2.5 cm25 mm <br />0.025 m <br /> (10 cm100 mm <br />0.1 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.85 cm8.5 mm <br />0.0085 m <br />) +
3-carpellate +  and 2-carpellate +
ebracteate +, bracteate +  and 2-300(-1000+)-flowered +
Calif. +, Idaho +, Oreg. +  and Wash. +
10-1900 m +
unisexual +  and bisexual +
bearing 1-5 cauline leaves +  and leafless +
6 cm60 mm <br />0.06 m <br /> (57 cm570 mm <br />0.57 m <br />) +
2-3(-4)-beaked +  and folliclelike +
Evergreen coniferous forests on basalt, schistose shale, metavolcanic, ultra basic, or serpentine-derived soils +
multicellular +
tinged with red +  and greenish white +
1.4mm;4.5mm +
long-stipitate-glandular +
0.1 cm1 mm <br />0.001 m <br /> (0.49 cm4.9 mm <br />0.0049 m <br />) +
stipitate-glandular;glabrous +
short to medium +
bracteate +, not secund +  and 100-1000-flowered +
dense +  and diffuse +
opposite +  and alternate +
rounded +
entire +  and dentate +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
crassinucellate +, unitegmic +  and bitegmic +
epigynous +, perigynous +  and hypogynous +
pale-pink +  and white +
distinct +
unlobed +  and oblanceolate +
0.16 cm1.6 mm <br />0.0016 m <br /> (0.33 cm3.3 mm <br />0.0033 m <br />) +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
peltate +  and jointed +
long-stipitate-glandular +  and glabrous +
Flowering May–Jun. +
unequal +
Edwards’s Bot. Reg. +
straight +
muricate +, cellular-rugulose +, tuberculate +, pitted +, papillate +  and wrinkled +
ellipsoid +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
red-tipped +  and green +
distinct +
spreading +  and nearly erect +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
unbranched +  and branched +
persistent +
horizontal +  and erect +
0 cm0 mm <br />0 m <br /> (0.01 cm0.1 mm <br />1.0e-4 m <br />) +
connate +  and distinct +
0.16 cm1.6 mm <br />0.0016 m <br /> (0.31 cm3.1 mm <br />0.0031 m <br />) +
long-stipitate-glandular +  and glabrous +
Heuchera micrantha var. micrantha +
Heuchera micrantha +
variety +
glandular-ciliate +  and ciliate +
crenate +  and dentate +
annual +, biennial +  and perennial +