Jepson Flora Project: Jepson Interchange    

 
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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California

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  • Up-to-date information about California vascular plants is available from the Jepson eFlora.

SAXIFRAGACEAE

SAXIFRAGE FAMILY

Patrick E. Elvander

Perennial or subshrub from caudex or rhizome, generally ± hairy
Stem often ± leafy on lower half, rarely trailing and leafy throughout
Leaves generally simple, basal or sometimes cauline, generally alternate, generally petioled; veins ± palmate
Inflorescence: panicle, generally ± scapose
Flower generally bisexual, generally radial; hypanthium free to ± fused to ovary; calyx lobes generally 5; petals generally 5, free, generally clawed, generally white; stamens generally 5 or 10; pistils 2 and simple or 1 and compound (chambers 1–2, placentas 2–4, axile or parietal), ovary superior to inferior, sometimes more superior in fruit, styles generally 2
Fruit: 2 follicles or 2–4-valved capsule
Seeds generally many, small
Genera in family: 40 genera, 600 species: especially n temp, arctic, alpine; some cultivated (Bergenia , Darmera , Heuchera , Saxifraga , Tellima , Tolmiea )
Reference: [Soltis 1988 Syst Bot 13:64–72]

HEUCHERA

ALUMROOT

Rhizome scaly; bulblets 0
Leaves basal, sometimes a few cauline; blade ovate, base cordate to reniform, lobes and teeth shallow, irregular
Inflorescence generally raceme-like; bracts generally scale-like
Flower radial to ± bilateral; hypanthium partly fused to ovary; calyx lobes equal or not; petals 0 or 5, generally equal; stamens 5, generally equal; pistil 1, ovary > half inferior, chamber 1, placentas 2, parietal
Fruit: capsule
Species in genus: 50 species: North America
Etymology: (J.H. von Heucher, German professor of medicine, 1677–1747)
Reference: [Rosendahl, Butters, & Lakela 1936 Minn Stud Plant Sci 2:1–180]
A very difficult genus, highly variable at many levels and needing much additional research.

Native

H. parvifolia Nutt.


Leaf: petiole (1)2.5–5(15) cm; blade 0.5–2(7.5) cm, round-reniform, shallowly 5–9-lobed
Inflorescence 14–20(75) cm, dense toward tips, ± short-glandular
Flower radial; part of hypanthium fused to ovary 0.8–1(1.5) mm, < free part, together with calyx lobes 2–3(4.2) mm; calyx lobes cream to yellowish with pink to greenish tips; petals (0.7)1.5–3 mm, = or > calyx lobes, lanceolate to oblanceolate or rhombic; stamens << calyx lobes, included; mature styles << 1 mm, included
Ecology: Rocky areas
Elevation: (1200)2500–3000(3900) m.
Bioregional distribution: n East of Sierra Nevada (Sweetwater Mtns), White and Inyo Mountains (White Mtns)
Distribution outside California: to Rocky Mtns, Arizona, New Mexico
Flowering time: (May)Jul–Aug(early Sep)
Synonyms: H. duranii Bacig
The species has several intergrading varieties; our form is a depauperate ecotype found at high elevations. Needs monographic study
Horticultural information: In cultivation.

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bioregional map for HEUCHERA%20parvifolia being generated
 
N.B. The distribution depicted here differs from that given in The Jepson Manual (1993)

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