Jepson eFlora: Key page
Vascular Plants of California
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Key to Heuchera

View taxon page for Heuchera

(For a list of species in Heuchera, use the above link.)

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

1. Styles and generally all stamens  in full flower

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

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

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

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

4. Inflorescence glands nearly , stalk ± = gland  generally < 15 mm, generally broadly , 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 , lobed 1/4–1/3 to base

5. Stamens generally < 1/2 calyx lobes; part of  free from ovary ± 0.7 mm on short side, ± 1.5 mm on long side – PR (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 – PR ..... H. hirsutissima

1' Styles and stamens  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  ..... 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 ; inflorescence generally open

10. Hypanthium + calyx 3.5–4.5 mm; leaf blade 6–18 cm wide; n ChI ..... 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 ; inflorescence ± dense or open

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

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

 

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Citation for the whole project: Jepson Flora Project (eds.) . Jepson eFlora, http://ucjeps.berkeley.edu/eflora/ [accessed on ]

Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on .

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