Heuchera americana var. americana

IllustratedEndemic
Synonyms: Heuchera americana var. brevipetala Fernald Heuchera americana var. heteradenia Fernald Heuchera americana var. subtruncata Rydberg Heuchera calycosa Heuchera curtisii Heuchera curtisii var. crenata Heuchera lancipetala
Treatment appears in FNA Volume 8. Treatment on page 94. Mentioned on page 95.

Petioles glabrous or very short to sparsely long-stipitate-glandular. Flowers: hypanthium free 0.6–1.5 mm, urceolate; petals greenish, white, or pink, narrower than sepals, margins entire or finely dentate. 2n = 14.


Phenology: Flowering Apr–Jun.
Habitat: Rich woods often over base-saturated granite and gneiss, or in shallow, rocky soil
Elevation: 70-1300 m

Distribution

V8 181-distribution-map.gif

Ont., Ala., Ark., Conn., Del., Ga., Ill., Ind., Ky., La., Md., Mich., Miss., Mo., N.J., N.Y., N.C., Ohio, Okla., Pa., S.C., Tenn., Va., W.Va.

Discussion

Variety americana is widely distributed from Connecticut to Georgia and from southern Ontario and Ohio to Oklahoma and northwestern Louisiana. It intergrades with Heuchera pubescens and H. richardsonii where their ranges overlap, but not with H. longiflora, H. parviflora, or H. villosa, which also share overlapping ranges with it.

Selected References

None.

Lower Taxa

None.

"full" is not a number."narrower" is not a number.

epigynous +, perigynous +  and hypogynous +
rounded +, obtuse +  and acute +
Elizabeth Fortson Wells +  and Barbara Greene Shipes +
Linnaeus +
cordate +  and nearly truncate +
not papillose +
dentate +, serrate +  and entire +
glandular-ciliate +  and ciliate +
3-9-lobed +, polygonal +, oblong +, cordate +, ovate +, orbiculate +  and reniform +
0.4 cm4 mm <br />0.004 m <br /> (1.05 cm10.5 mm <br />0.0105 m <br />) +
3-carpellate +  and 2-carpellate +
ebracteate +, bracteate +  and 2-300(-1000+)-flowered +
Ont. +, Ala. +, Ark. +, Conn. +, Del. +, Ga. +, Ill. +, Ind. +, Ky. +, La. +, Md. +, Mich. +, Miss. +, Mo. +, N.J. +, N.Y. +, N.C. +, Ohio +, Okla. +, Pa. +, S.C. +, Tenn. +, Va. +  and W.Va. +
70-1300 m +
unisexual +  and bisexual +
40 cm400 mm <br />0.4 m <br /> (145 cm1,450 mm <br />1.45 m <br />) +
2-3(-4)-beaked +  and folliclelike +
Rich woods often over base-saturated granite and gneiss, or in shallow, rocky soil +
multicellular +
short-stipitate-glandular +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
bracteate +, not secund +  and 100-1000-flowered +
dense +  and diffuse +
opposite +  and alternate +
5-9-lobed +, broadly ovate +  and cordate +
3.5 cm35 mm <br />0.035 m <br /> (11 cm110 mm <br />0.11 m <br />) +
ovate;rounded +
dentate +  and entire +
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 +
pink +, white +  and greenish +
distinct +
unlobed +  and spatulate +
0.09 cm0.9 mm <br />9.0e-4 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
peltate +  and jointed +
long-stipitate-glandular +  and glabrous +
Flowering Apr–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 /> (0.09 cm0.9 mm <br />9.0e-4 m <br />) +
green-tipped +
distinct +
0.1 cm1 mm <br />0.001 m <br /> (0.24 cm2.4 mm <br />0.0024 m <br />) +
Illustrated +  and Endemic +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 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 /> (0.7 cm7 mm <br />0.007 m <br />) +
short-stipitate-glandular +  and glabrous +
Heuchera americana var. brevipetala +, Heuchera americana var. heteradenia +, Heuchera americana var. subtruncata +, Heuchera calycosa +, Heuchera curtisii +, Heuchera curtisii var. crenata +  and Heuchera lancipetala +
Heuchera americana var. americana +
Heuchera americana +
variety +
glandular-ciliate +  and ciliate +
crenate +  and dentate +
annual +, biennial +  and perennial +