Jepson eFlora: Taxon page
Vascular Plants of California
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Geranium bicknellii

Higher Taxonomy
Family: GeraniaceaeView DescriptionDichotomous Key

Habit: Annual, perennial herb, or +- woody, generally glandular-hairy. Leaf: simple to compound, basal and cauline; cauline alternate or opposite, stipules 2, +- on stem. Inflorescence: cyme or pseudo-umbel or 1--2-flowered. Flower: bisexual [unisexual], radial or +- bilateral; sepals 5, free, overlapping in bud; petals generally 5, free, generally with nectar glands at base; stamens generally 5,10[15]; staminodes scale-like or 0; ovary generally 5-lobed, upper part elongating into beak in fruit, chambers 5, placentas axile, style 1, stigmas 5, free, persistent in fruit. Fruit: septicidal [loculicidal], mericarps 5, dry, generally 1-seeded, each persistent on 1 of 5 linear segments of beak that separate from central column by curving or coiling upward.
Genera In Family: 6 genera, 709 species: temperate, +- tropics. Some cultivated for ornament, perfume oils.
eFlora Treatment Author: Carlos Aedo, except as noted
Scientific Editor: Thomas J. Rosatti.
Geranium bicknellii Britton
Habit: Annual. Stem: decumbent to erect, 1--6 dm; hairs short, stiff. Leaf: blade 2--7 cm wide, divided 0.85--0.95 to base, segments 5(7), wedge-shaped. Flower: pedicel 10--25 mm; sepals 4--6 mm, smooth, short-awned; petals 4--6 mm, +- notched, pale purple. Fruit: mericarp 3--3.5 mm, smooth, minutely bristly; beak 1.5--2.1 cm, narrow tip 3.5--4.5 mm; stigmas +- 1 mm. Seed: finely pitted. Chromosomes: 2n=52.
Ecology: Open, sunny to shaded sites, woodland, conifer forest; Elevation: 600--1500 m. Bioregional Distribution: KR/CaRH, n SCo; Distribution Outside California: to British Columbia, northeastern North America; alien in Venezuela. Flowering Time: Jan--Aug
Synonyms: Geranium bicknellii var. longipes (S. Watson) Fernald
Jepson eFlora Author: Carlos Aedo
Reference: [Aedo 2001 Anales Jard Bot Madrid 59:3--65; Aedo et al. 1998 Ann Missouri Bot Gard 85:594--630]
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)

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Botanical illustration including Geranium bicknellii

botanical illustration including Geranium bicknellii

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Citation for this treatment: Carlos Aedo 2022, Geranium bicknellii, in Jepson Flora Project (eds.) Jepson eFlora, Revision 11,, accessed on October 02, 2023.

Citation for the whole project: Jepson Flora Project (eds.) 2023, Jepson eFlora,, accessed on October 02, 2023.

Geranium bicknellii
click for enlargement
© 2016 Keir Morse
Geranium bicknellii
click for enlargement
© 2016 Keir Morse

More photos of Geranium bicknellii in CalPhotos

Geographic subdivisions for Geranium bicknellii:
KR/CaRH, n SCo
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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).


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).