Heuchera alba

Rydberg

Torreya 26: 31, plate 2. 1926,.

Treatment appears in FNA Volume 8. Treatment on page 96. Mentioned on page 84, 88.

Herbs acaulescent; caudex branched. Flowering-stems often leafy, 26–77 cm, short-stipitate-glandular. Leaves: petiole glabrous or short-stipitate-glandular; blade broadly ovate to cordate, shallowly 5-lobed, 4.5–9 cm, base cordate or nearly truncate, lobes rounded to widely ovate, margins dentate, apex acute or obtuse, surfaces glabrous or sparsely stipitate-glandular, at least on veins. Inflorescences diffuse. Flowers: hypanthium moderately bilaterally symmetric, free 3.5–4.5 mm, green, campanulate, abruptly inflated distal to adnation to ovary, 7.5–11 mm, short-stipitate-glandular; sepals spreading, green-tipped, equal, 3–4 mm, apex rounded (sinuses narrower than petals); petals inflexed, white, broadly spatulate, unlobed, 2.8–3.5 mm, margins fimbriate; stamens 2 mm included to 2 mm exserted; styles included 0.5–1 mm, 4–6 mm, to 0.1 mm diam. Capsules ovoid, 9–10 mm, beaks divergent, not papillose. Seeds dark-brown, ellipsoid, 0.6–1 mm.


Phenology: Flowering May–Jun.
Habitat: Shaded or exposed sandstone rock outcroppings, ridges, and peaks
Elevation: 1300-1500 m

Discussion

Of conservation concern.

Heuchera alba occurs on sandstone ridges in the Ridge and Valley Province.

Selected References

None.

Lower Taxa

None.

"full" is not a number.

... more about "Heuchera alba"
epigynous +, perigynous +  and hypogynous +
rounded +, obtuse +  and acute +
Elizabeth Fortson Wells +  and Barbara Greene Shipes +
Rydberg +
truncate +  and cordate +
not papillose +
dentate +, serrate +  and entire +
glandular-ciliate +  and ciliate +
5-lobed +, broadly ovate +  and cordate +
4.5 cm45 mm <br />0.045 m <br /> (9 cm90 mm <br />0.09 m <br />) +
0.9 cm9 mm <br />0.009 m <br /> (1 cm10 mm <br />0.01 m <br />) +
3-carpellate +  and 2-carpellate +
ebracteate +, bracteate +  and 2-300(-1000+)-flowered +
Va. +  and W.Va. +
1300-1500 m +
unisexual +  and bisexual +
26 cm260 mm <br />0.26 m <br /> (77 cm770 mm <br />0.77 m <br />) +
2-3(-4)-beaked +  and folliclelike +
Shaded or exposed sandstone rock outcroppings, ridges, and peaks +
multicellular +
short-stipitate-glandular +
inflated +  and campanulate +
0.75 cm7.5 mm <br />0.0075 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
bracteate +, not secund +  and 100-1000-flowered +
dense +  and diffuse +
opposite +  and alternate +
rounded;widely ovate +
fimbriate +
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 spatulate +
0.28 cm2.8 mm <br />0.0028 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
peltate +  and jointed +
short-stipitate-glandular +  and glabrous +
Flowering May–Jun. +
unequal +
dark-brown +
straight +
muricate +, cellular-rugulose +, tuberculate +, pitted +, papillate +  and wrinkled +
ellipsoid +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
green-tipped +
distinct +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
exserted +  and included +
2 cm20 mm <br />0.02 m <br /> (2 cm20 mm <br />0.02 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 +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
stipitate-glandular +  and glabrous +
Heuchera alba +
Heuchera +
species +
glandular-ciliate +  and ciliate +
crenate +  and dentate +
annual +, biennial +  and perennial +