Heuchera hallii

A. Gray

Proc. Acad. Nat. Sci. Philadelphia 15: 62. 1864 ,.

Common names: Front Range alum-root
Endemic
Treatment appears in FNA Volume 8. Treatment on page 102. Mentioned on page 84, 86.

Herbs acaulescent; caudex branched or unbranched. Flowering-stems 10–30 cm, glabrous or short-stipitate-glandular. Leaves: petiole glabrous or short-stipitate-glandular; blade rounded-reniform, deeply 5–7-lobed, 1–3.8 cm, base cordate, lobes rounded, margins dentate, apex obtuse, surfaces glabrous or short-stipitate-glandular. Inflorescences dense, (sometimes secund). Flowers: hypanthium weakly bilaterally symmetric, free 0.8 mm, greenish or pinkish yellow, broadly campanulate, 4–5.5 mm, short-stipitate-glandular proximally, medium stipitate-glandular distally; sepals erect, green-tipped, equal, 1.2–2 mm, apex rounded-ovate; petals usually spreading, white, broadly oblanceolate, (clawed), unlobed, 1.8–2.5 mm, margins entire; stamens included 1 mm; (filaments erect or incurved distally, relatively slender, longer than and not concealed by anthers); styles included 1.5 mm, 1 mm, 0.1+ mm diam. Capsules globose or ovoid, 3.5–4 mm, beaks divergent, not papillose. Seeds dark-brown, fusiform, 0.6 mm. 2n = 14.


Phenology: Flowering Jun–Aug.
Habitat: Subalpine and alpine regions
Elevation: 2200-3000 m

Discussion

Heuchera hallii occurs in south-central Colorado. It resembles H. bracteata in shape and size of the flowers and congestion of the inflorescence. It is distinguished by having stamens and styles included; H. bracteata has stamens and styles exserted.

Selected References

None.

Lower Taxa

None.

"full" is not a number.

... more about "Heuchera hallii"
epigynous +, perigynous +  and hypogynous +
rounded-ovate +  and obtuse +
Elizabeth Fortson Wells +  and Barbara Greene Shipes +
A. Gray +
cordate +
not papillose +
dentate +, serrate +  and entire +
glandular-ciliate +  and ciliate +
5-7-lobed +  and rounded-reniform +
1 cm10 mm <br />0.01 m <br /> (3.8 cm38 mm <br />0.038 m <br />) +
ovoid +  and globose +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
3-carpellate +  and 2-carpellate +
unbranched +  and branched +
Front Range alum-root +
ebracteate +, bracteate +  and 2-300(-1000+)-flowered +
2200-3000 m +
unisexual +  and bisexual +
bearing 1-5 cauline leaves +  and leafless +
10 cm100 mm <br />0.1 m <br /> (30 cm300 mm <br />0.3 m <br />) +
2-3(-4)-beaked +  and folliclelike +
Subalpine and alpine regions +
multicellular +
pinkish yellow +  and greenish +
stipitate-glandular +  and short-stipitate-glandular +
campanulate +
0.4 cm4 mm <br />0.004 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 +
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 +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
peltate +  and jointed +
short-stipitate-glandular +  and glabrous +
Flowering Jun–Aug. +
unequal +
Proc. Acad. Nat. Sci. Philadelphia +
dark-brown +
straight +
muricate +, cellular-rugulose +, tuberculate +, pitted +, papillate +  and wrinkled +
fusiform +
0.6 cm6 mm <br />0.006 m <br /> (?) +
green-tipped +
distinct +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
unbranched +  and branched +
persistent +
horizontal +  and erect +
connate +  and distinct +
1 cm10 mm <br />0.01 m <br /> (?) +
short-stipitate-glandular +  and glabrous +
Heuchera hallii +
Heuchera +
species +
glandular-ciliate +  and ciliate +
crenate +  and dentate +
annual +, biennial +  and perennial +