Heuchera merriamii

Eastwood

Bull. Torrey Bot. Club 32: 199. 1905 (as merriami),.

Endemic
Treatment appears in FNA Volume 8. Treatment on page 93. Mentioned on page 87.

Herbs acaulescent; caudex branched or unbranched. Flowering-stems 11–32 cm, long-stipitate-glandular or glabrate. Leaves: petiole (2.4–5 cm), moderately long-stipitate-glandular; blade orbiculate, reniform, or pentagonal, shallowly 5–7-lobed, 2.5–4.5 cm, base shallowly cordate to truncate, lobes rounded, margins dentate, apex rounded to obtuse, surfaces finely long-stipitate-glandular abaxially, sparsely long-stipitate-glandular adaxially. Inflorescences dense; (bracts linear and scarious to 3–5-parted and herbaceous). Flowers: hypanthium radially symmetric, free 0.5–1.5 mm, pink, hemispheric, 3–5.5 mm, (base rounded), densely long-stipitate-glandular; sepals erect, green or red-tipped, equal, 1–2 mm (often wider than long), apex obtuse; petals erect, white, oblanceolate, (clawed), unlobed, 2–3.5 mm, margins entire; stamens exserted 0.8–2 mm; styles exserted 1–2 mm, 1.5–2.5 mm, 0.1+ mm diam. Capsules ovoid, 3–5 mm, beaks divergent, not papillose. Seeds dark-brown, ellipsoid, 0.6 mm. 2n = 14.


Phenology: Flowering Jul–Aug.
Habitat: Exposed granite ledges in subalpine forests
Elevation: 1500-2500 m

Discussion

Heuchera merriamii is known from the Siskiyou and Trinity mountains.

Selected References

None.

Lower Taxa

None.

"full" is not a number.

... more about "Heuchera merriamii"
epigynous +, perigynous +  and hypogynous +
obtuse +  and rounded +
Elizabeth Fortson Wells +  and Barbara Greene Shipes +
Eastwood +
shallowly cordate +  and truncate +
not papillose +
dentate +, serrate +  and entire +
glandular-ciliate +  and ciliate +
5-7-lobed +, pentagonal +, reniform +  and orbiculate +
2.5 cm25 mm <br />0.025 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
3-carpellate +  and 2-carpellate +
unbranched +  and branched +
ebracteate +, bracteate +  and 2-300(-1000+)-flowered +
Calif. +  and Oreg. +
1500-2500 m +
unisexual +  and bisexual +
bearing 1-5 cauline leaves +  and leafless +
11 cm110 mm <br />0.11 m <br /> (32 cm320 mm <br />0.32 m <br />) +
2-3(-4)-beaked +  and folliclelike +
Exposed granite ledges in subalpine forests +
multicellular +
long-stipitate-glandular +
hemispheric +
0.3 cm3 mm <br />0.003 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
bracteate +, not secund +  and 100-1000-flowered +
dense +  and diffuse +
opposite +  and alternate +
long-stipitate-glandular +
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 +
distinct +
unlobed +  and oblanceolate +
0.2 cm2 mm <br />0.002 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
peltate +  and jointed +
stipitate-glandular +  and glabrous +
Flowering Jul–Aug. +
unequal +
Bull. Torrey Bot. Club +
dark-brown +
straight +
muricate +, cellular-rugulose +, tuberculate +, pitted +, papillate +  and wrinkled +
ellipsoid +
0.6 cm6 mm <br />0.006 m <br /> (?) +
red-tipped +  and green +
distinct +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
unbranched +  and branched +
persistent +
horizontal +  and erect +
connate +  and distinct +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
long-stipitate-glandular +
Heuchera merriamii +
Heuchera +
species +
glandular-ciliate +  and ciliate +
crenate +  and dentate +
annual +, biennial +  and perennial +