Heuchera longiflora


in N. L. Britton, Man. Fl. N. States, 482. 1901,.

Common names: Long-flowered alum-root
Synonyms: Heuchera aceroides Rydberg ex Small Heuchera longiflora var. aceroides (Rydberg ex Small) Rosendahl, Butters & Lakela Heuchera scabra
Treatment appears in FNA Volume 8. Treatment on page 97. Mentioned on page 84, 88, 94.

Herbs acaulescent; caudex branched. Flowering stems often leafy, 30–95 cm, glabrous or short stipitate-glandular. Leaves: petiole glabrous or short stipitate-glandular; blade (often variegated adaxially), broadly ovate to cordate, shallowly 5-lobed, 3–12 cm, base cordate or nearly truncate, lobes rounded to widely ovate, terminal lobes often elongated, margins dentate, apex acute or obtuse, surfaces glabrous or short stipitate-glandular, at least on veins. Inflorescences diffuse. Flowers: hypanthium strongly bilaterally symmetric, free 2.2–6.2 mm, green, gibbous-tubular, abruptly inflated distal to adnation to ovary, 6.6–12.6 mm, short stipitate-glandular; sepals inflexed (closing mouth of flower), darker green-tipped, equal, 2–3.7 mm, apex rounded; petals inflexed (closing mouth of flower), white, pink, or purple, spatulate, unlobed, 1.8–5.5 mm, margins often fimbriate; stamens 2.4 mm included to 0.7 mm exserted; styles included 1.3–5.3 mm, 1.5–2.5 mm, to 0.1 mm diam. Capsules ovoid, 5–13 mm, beaks divergent, not papillose. Seeds dark brown, ellipsoid, 0.5–0.9 mm. 2n = 14.

Phenology: Flowering May–Jun.
Habitat: Rich, shaded woods and roadcuts over limestone substrates and outcroppings
Elevation: 100-500 m


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Ala., Ky., N.C., Tenn., Va., W.Va.


Heuchera longiflora is restricted to limestone outcroppings and is rare in all the states where it is found.

Selected References


Lower Taxa

... more about "Heuchera longiflora"
Elizabeth Fortson Wells +  and Barbara Greene Shipes +
Rydberg +
Long-flowered alum-root +
Ala. +, Ky. +, N.C. +, Tenn. +, Va. +  and W.Va. +
100-500 m +
Rich, shaded woods and roadcuts over limestone substrates and outcroppings +
Flowering May–Jun. +
in N. L. Britton, Man. Fl. N. States, +
Heuchera aceroides +, Heuchera longiflora var. aceroides +  and Heuchera scabra +
Heuchera longiflora +
Heuchera +
species +