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Vascular Plants of California
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Horkelia congesta var. nemorosa
JOSEPHINE HORKELIA


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: HorkeliaView DescriptionDichotomous Key


Habit: Perennial herb, generally +- glandular, generally resinous-smelling; caudex generally branched. Stem: generally ascending to erect. Leaf: generally basal, odd-1-pinnately compound, generally +- flat; cauline alternate, reduced upward; leaflets 2--15 per side, uppermost lateral generally +- fused with terminal. Inflorescence: cyme; pedicels generally straight, bractlets 0. Flower: hypanthium cup-like, +- flat-bottomed, width +- 2 × length, bractlets 5, generally 2/3 sepals; sepals often reflexed; petals generally +- = sepal, blunt, white; stamens 10, filaments +- flat, often forming a tube; pistils 2--many, ovary superior, style attached below fruit tip, +- thicker at base. Fruit: achene.
Species In Genus: 20 species: western North America. Etymology: (J. Horkel, German plant physiologist, 1769--1846) Note: Many attractive to bees; data apply to basal leaves, pressed hypanthia.
eFlora Treatment Author: Barbara Ertter
Reference: Ertter & Reveal 2007 Novon 17:315--325
Horkelia congesta Dougl. ex Hook. var. nemorosa (D.D. Keck) M. Peck
NATIVE
Habit: Plant tufted or rosetted, +- gray-green, +- odorless; caudex 0--few-branched. Stem: 15--30 cm, densely glandular above. Leaf: 4--8 cm; stipules entire to forked; leaflets 2--5 per side, separated, 5--12 mm, +- elliptic, < 5-toothed < 1/4 to base, densely hairy. Inflorescence: clusters 1--several, head-like, generally 5--15-flowered; pedicels generally +- 2 mm. Flower: hypanthium width generally 3--4.5 mm, <= 2 × length, bractlets < 0.5 mm wide, linear; sepals 2--4.5 mm; petals generally 2.5--4 mm, generally widely obovate; filaments 0.5--2 mm, base 0.2--0.5 mm wide, anthers +- 0.5 mm; pistils +- 10, style 2--3 mm. Fruit: +- 2 mm.
Ecology: Vernally moist, rocky clay, generally serpentine; Elevation: 300--800 m. Bioregional Distribution: nw KR (Del Norte Co.); Distribution Outside California: southwestern Oregon. Flowering Time: Apr--Jun
Synonyms: Horkelia congesta subsp. nemorosa D.D. Keck
Jepson eFlora Author: Barbara Ertter
Reference: Ertter & Reveal 2007 Novon 17:315--325
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Citation for this treatment: Barbara Ertter 2012, Horkelia congesta var. nemorosa, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=91753, accessed on November 19, 2019.

Citation for the whole project: Jepson Flora Project (eds.) 2019, Jepson eFlora, http://ucjeps.berkeley.edu/eflora/, accessed on November 19, 2019.

No expert verified images found for Horkelia congesta var. nemorosa.



Geographic subdivisions for Horkelia congesta var. nemorosa:
nw KR (Del Norte Co.)
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map of distribution 1
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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.