Heuchera hirsutissima

Rosendahl

Minnesota Stud. Pl. Sci. 2: 110. 1936,.

Common names: Shaggyhair alum-root
EndemicConservation concern
Treatment appears in FNA Volume 8. Treatment on page 99. Mentioned on page 87, 100.

Herbs acaulescent; caudex branched. Flowering-stems 10–40 cm, short-stipitate-glandular and sparsely long-stipitate-glandular. Leaves: petiole long-stipitate-glandular; blade orbiculate to reniform, shallowly 5-lobed, 1–1.5 cm, base cordate, lobes rounded, margins dentate, apex obtuse, surfaces long-stipitate-glandular. Inflorescenses dense. Flowers: hypanthium strongly bilaterally symmetric, free 0.8 mm on abaxial side, 1.8 mm on adaxial side, pink, narrowly cylindric, 5–6.5 mm, short-stipitate-glandular proximally, densely long-stipitate-glandular distally; sepals spreading, green and red-tipped, unequal, 0.5–1.5 mm on abaxial side of hypanthium, to 0.5 mm on adaxial side, apex rounded; petals spreading, white, oblanceolate, (clawed), unlobed, 2–2.5 mm (equaling or longer than sepals, rarely shorter), margins entire; stamens exserted to 0.5 mm; styles included to 0.5 mm, 1.5 mm, 0.1+ mm diam. Capsules ovoid, 3 mm, beaks divergent, not papillose. Seeds dark-brown, ellipsoid, ca. 0.7 mm. 2n = 14.


Phenology: Flowering Jul–Aug.
Habitat: Fir and subalpine forest
Elevation: 2100-3500 m

Discussion

Of conservation concern.

Heuchera hirsutissima is known from Mount San Jacinto and the San Jacinto Mountains of Riverside County and possibly the San Bernardino Mountains of San Bernardino County. It resembles H. caespitosa and H. elegans, except for its densely villous hypanthium and minute adaxial sepals.

Selected References

None.

Lower Taxa

None.

"full" is not a number.

... more about "Heuchera hirsutissima"
epigynous +, perigynous +  and hypogynous +
rounded +  and obtuse +
Elizabeth Fortson Wells +  and Barbara Greene Shipes +
Rosendahl +
cordate +
not papillose +
dentate +, serrate +  and entire +
glandular-ciliate +  and ciliate +
5-lobed +, orbiculate +  and reniform +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
3 cm30 mm <br />0.03 m <br /> (?) +
3-carpellate +  and 2-carpellate +
Shaggyhair alum-root +
ebracteate +, bracteate +  and 2-300(-1000+)-flowered +
2100-3500 m +
unisexual +  and bisexual +
bearing 1-5 cauline leaves +  and leafless +
10 cm100 mm <br />0.1 m <br /> (40 cm400 mm <br />0.4 m <br />) +
2-3(-4)-beaked +  and folliclelike +
Fir and subalpine forest +
multicellular +
long-stipitate-glandular +  and short-stipitate-glandular +
0.5 cm5 mm <br />0.005 m <br /> (0.65 cm6.5 mm <br />0.0065 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 +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
peltate +  and jointed +
long-stipitate-glandular +
Flowering Jul–Aug. +
unequal +
Minnesota Stud. Pl. Sci. +
dark-brown +
straight +
muricate +, cellular-rugulose +, tuberculate +, pitted +, papillate +  and wrinkled +
ellipsoid +
0.7 cm7 mm <br />0.007 m <br /> (?) +
green and red-tipped +
distinct +
unequal +
0 cm0 mm <br />0 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
Endemic +  and Conservation concern +
unbranched +  and branched +
persistent +
horizontal +  and erect +
connate +  and distinct +
1.5 cm15 mm <br />0.015 m <br /> (?) +
long-stipitate-glandular +
Heuchera hirsutissima +
Heuchera +
species +
glandular-ciliate +  and ciliate +
crenate +  and dentate +
annual +, biennial +  and perennial +