Jepson eFlora
Key to families | Table of families and genera

Key to Heuchera

View taxon page for Heuchera

Jepson Manual glossary definitions can be seen by moving your cursor over words underlined with dots.

1. Styles and generally all stamens included in full flower

2. Petals generally 0; inflorescence narrow, spike-like ..... H. cylindrica

2' Petals present, ± conspicuous; inflorescence more open, panicle or raceme-like

3. Hypanthium + calyx 2–3(4.2) mm, radial; calyx lobes equal, cream to ± yellow, tips pink to ± green ..... H. parvifolia

3' Hypanthium + calyx generally > 3.5 mm, ± bilateral; calyx lobes ± unequal, light pink to red-purple, tips green or not (Heuchera caespitosa complex)

4. Inflorescence glands nearly sessile, stalk ± = gland; leaf blade generally < 15 mm, generally broadly ovate, lobed ± 1/2 to base ..... H. abramsii

4' Inflorescence glands nearly sessile and long-stalked, stalk >> gland; leaf blade generally > 15 mm, generally round to reniform, lobed 1/4–1/3 to base

5. Stamens generally < 1/2 calyx lobes; part of hypanthium free from ovary ± 0.7 mm on short side, ± 1.5 mm on long side — Peninsular Ranges (San Diego Co.) ..... H. brevistaminea

5' Stamens ± = calyx lobes; part of hypanthium free from ovary > 0.8 mm on short side, > 1.8 mm on long side

6. Calyx lobes all well developed ..... H. caespitosa

6' Calyx lobes on long side of hypanthium minute — Peninsular Ranges ..... H. hirsutissima

1' Styles and stamens exserted in full flower

7. Flower ± bilateral; calyx lobes ± equal or not; part of hypanthium fused to ovary ± = long side of free part

8. Petals 2–3 mm, > 0.3 mm wide, oblanceolate, unequal; hypanthium strongly oblique ..... H. parishii

8' Petals 3–6 mm, generally << 0.3 mm wide, thread-like to narrowly oblanceolate, equal; hypanthium slightly oblique ..... H. rubescens

7' Flower ± radial; calyx lobes ± equal; part of hypanthium fused to ovary generally > free part

9. Styles 2–4 mm, exserted; hypanthium broadly obconic, base tapered; inflorescence generally open

10. Hypanthium + calyx 3.5–4.5 mm; leaf blade 6–18 cm wide; n Channel Islands ..... H. maxima

10' Hypanthium + calyx 1.5–3(5) mm; leaf blade 2–10 cm wide; mainland ..... H. micrantha

9' Styles generally <= 1.8 mm, barely exserted; hypanthium bell-shaped, base truncate; inflorescence ± dense or open

11. Leaf blade generally round, base ± truncate; petiole 2–5 cm, hairs short, stiff; >= 1500 m ..... H. merriamii

11' Leaf blade generally ovate, base cordate; petiole 7–20 cm, hairs long, soft; < 500 m ..... H. pilosissima


Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
We encourage links to these pages, but the content may not be downloaded for reposting, repackaging, redistributing, or sale in any form, without written permission from The Jepson Herbarium.