Jepson eFlora: Taxon page
Vascular Plants of California
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Aruncus dioicus var. acuminatus

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: AruncusView Description 

Common Name: GOAT'S BEARD

Species In Genus: 1 sp.: northern temperate North America, Europe. Etymology: (Latin: goat's beard, for inflorescence)
eFlora Treatment Author: T. Lawrence Mellichamp & Margriet Wetherwax
Aruncus dioicus (Walter) Fernald var. acuminatus (Rydb.) H. Hara
Habit: Perennial herb; rhizome stout; dioecious. Stem: 1--2 m, glabrous. Leaf: < 60 cm, 2--3-pinnately compound, petioled; stipules 0; leaflets 3--16 cm, ovate, acuminate, 2-serrate, +- hairy. Inflorescence: panicle, < 50 cm; pedicels < 1 mm, bractlet 1, at top. Flower: hypanthium saucer-shaped, bractlets 0; sepals 5, 1--2 mm; petals 5, 1--2 mm, oblong to obovate, white to pale +- yellow. Staminate Flower: stamens 15--30, exserted. Pistillate Flower: pistils 3(5), styles short. Fruit: follicles 3(5), 3--5 mm, +- cylindric, reflexed, adaxially dehiscent. Seed: +- 2 mm. Chromosomes: 2n=18.
Ecology: Moist streambanks, conifer or mixed-evergreen forest; Elevation: < 1900 m. Bioregional Distribution: NCo, KR, n NCoRO, CaR; Distribution Outside California: to Alaska. Flowering Time: Jun--Sep Note: Other varieties in eastern North America.
Synonyms: Aruncus acuminatus Rydb.; Aruncus dioicus var. pubescens (Rydb.) Fernald, misappl.;
Jepson eFlora Author: T. Lawrence Mellichamp & Margriet Wetherwax
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Botanical illustration including Aruncus dioicus var. acuminatus

botanical illustration including Aruncus dioicus var. acuminatus


Citation for this treatment: T. Lawrence Mellichamp & Margriet Wetherwax 2012, Aruncus dioicus var. acuminatus, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on December 15, 2018.

Citation for the whole project: Jepson Flora Project (eds.) 2018, Jepson eFlora,, accessed on December 15, 2018.

Aruncus dioicus var. acuminatus
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© 2009 Barry Breckling

More photos of Aruncus dioicus var. acuminatus in CalPhotos

Geographic subdivisions for Aruncus dioicus var. acuminatus:
NCo, KR, n NCoRO, CaR;
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).

View elevation by latitude chart
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, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time.