Jepson eFlora: Taxon page
Vascular Plants of California
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Horkeliella purpurascens

Higher Taxonomy
Family: RosaceaeView DescriptionDichotomous Key
Common Name: ROSE FAMILY
Habit: Annual to tree, glandular or not. Leaf: simple to palmately or pinnately compound, generally alternate; stipules free to fused (0), persistent to deciduous. Inflorescence: cyme, raceme, panicle, cluster, or flowers 1; bractlets on pedicel ("pedicel bractlets") generally 0--3(many), subtended by bract or generally not. Flower: generally bisexual, radial; hypanthium free or fused to ovary, saucer- to funnel-shaped, subtending bractlets ("hypanthium bractlets") 0--5, alternate sepals; sepals generally 5; petals generally 5, free; stamens (0,1)5--many, anther pollen sacs generally 2; pistils (0)1--many, simple or compound, ovary superior to inferior, styles 1--5. Fruit: 1--many per flower, achene (fleshy-coated or not), follicle, drupe, or pome with generally papery core, occasionally drupe-like with 1--5 stones. Seed: generally 1--5 (per fruit, not per flower).
Genera In Family: 110 genera, +- 3000 species: worldwide, especially temperate; many cultivated for ornamental, fruit, especially Cotoneaster, Fragaria, Malus, Prunus, Pyracantha, Rosa, Rubus. Note: Number of teeth is per leaf or leaflet, not per side of leaf or leaflet, except in Drymocallis.
eFlora Treatment Author: Daniel Potter & Barbara Ertter, family description, key to genera, treatment of genera by Daniel Potter, except as noted
Scientific Editor: Daniel Potter, Thomas J. Rosatti.
Genus: HorkeliellaView DescriptionDichotomous Key

Habit: Perennial herb, tufted, +- glandular; odor +- resinous. Stem: ascending to erect, 15--50(90) cm. Leaf: generally basal, odd-pinnately compound; leaflets 15--35 per side, +- overlapped, toothed to palmately divided, segments +- oblanceolate. Inflorescence: +- cyme; pedicels straight, bractlets 0. Flower: hypanthium cup-like, flat-bottomed, bractlets 5; sepals often reflexed; petals white or +- pink, midvein often +- red; stamens 20, filaments +- flat, often an erect tube; pistils many, ovaries superior, style attached below fruit tip, +- rough, thick. Fruit: achene, +- 1.5 mm.
Species In Genus: 2 species: California. Etymology: (Latin: small Horkelia) Note: Flower +- like Horkelia.
eFlora Treatment Author: Barbara Ertter
Horkeliella purpurascens (S. Watson) Rydb.
Habit: Plant often +- gray, often not sticky. Leaf: basal generally 7--17 cm, leaflets 15--30 per side, generally 3--10 mm; cauline 2--4. Inflorescence: open at least in fruit; pedicels 1--15 mm. Flower: 10--15 mm wide; sepals 3--6 mm; petals 3--7 mm, +- oblanceolate; anthers 0.5--1 mm, filaments 1--2.5 mm; style +- 3--4 mm.
Ecology: Partial shade at granitic meadow edges in conifer forest; Elevation: 1400--2900 m. Bioregional Distribution: s SNH (w slope). Flowering Time: Jun--Aug
Synonyms: Ivesia purpurascens (S. Watson) D.D. Keck subsp. purpurascens
Jepson eFlora Author: Barbara Ertter
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)

Previous taxon: Horkeliella congdonis
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Citation for this treatment: Barbara Ertter 2012, Horkeliella purpurascens, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on September 19, 2021.

Citation for the whole project: Jepson Flora Project (eds.) 2021, Jepson eFlora,, accessed on September 19, 2021.

Horkeliella purpurascens
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© 2017 Aaron Schusteff
Horkeliella purpurascens
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© 2015 Chris Winchell
Horkeliella purpurascens
click for enlargement
© 2015 Chris Winchell
Horkeliella purpurascens
click for enlargement
© 2018 Aaron Schusteff
Horkeliella purpurascens
click for enlargement
© 2015 Chris Winchell
Horkeliella purpurascens
click for enlargement
© 2015 Chris Winchell

More photos of Horkeliella purpurascens in CalPhotos

Geographic subdivisions for Horkeliella purpurascens:
s SNH (w slope).
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map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).


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Data provided by the participants of the  Consortium of California Herbaria.
View all CCH records
All markers link to CCH specimen records. The original determination is shown in the popup window.
Blue markers indicate specimens that map to one of the expected Jepson geographic subdivisions (see left map). Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.

CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time (fruiting time in some monocot genera).