Jepson eFlora: Taxon page
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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
eFlora Treatment Author: Barbara Ertter
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Citation for this treatment: Barbara Ertter 2017. Horkeliella purpurascens, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on October 22, 2017.

Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora,, accessed on October 22, 2017.

Geographic subdivisions for Horkeliella purpurascens:
s SNH (w slope).
Markers link to CCH specimen records. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues. Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
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.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.