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Geranium viscosissimum

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, +- 750 species: temperate, +- tropics. Some cultivated for ornamental, perfume oils.
eFlora Treatment Author: Carlos Aedo, except as noted
Scientific Editor: Thomas J. Rosatti.
Genus: GeraniumView DescriptionDichotomous Key

Habit: Annual, perennial herb, often +- glandular, especially above. Stem: generally 1--4 mm wide in lower 1/2. Leaf: palmately lobed to divided, +- hairy; segments generally palmately lobed and/or toothed; upper alternate or opposite; blade generally round in outline, base generally cordate. Inflorescence: (1)2-flowered. Flower: radial (+- bilateral); sepals +- awned to mucronate; stamens 10, outer 5 opposite petals (lacking anthers in G. pusillum), inner 5 alternate petals, nectary glands 5, alternate petals. Fruit: mericarp generally ovoid, dehiscent, 1-seeded; basal callus generally present, often with long bristles.
Species In Genus: +- 400 species: temperate, tropical mountains. Etymology: (Greek: crane, from fruit beak)

Geranium viscosissimum Fisch. & C.A. Mey.
Habit: Perennial herb. Stem: erect, 3--9 dm; hairs sparse. Leaf: blade 7.1--16 cm wide, divided 0.75--0.85 to base, segments 5--9, rhombic. Flower: pedicel 6--34 mm; sepals 8--11 mm, smooth, awned; petals 17--20 mm, pink to red-purple, veins red to purple, basal adaxial surface soft-hairy; nectaries hair-tufted at top. Fruit: mericarp 4.5--5.5 mm, smooth, +- glandular puberulent; beak 25--29 mm, narrow tip 3--4 mm; stigmas 3--6 mm. Seed: pitted.
Ecology: Meadows, openings in sagebrush scrub, conifer forest; Elevation: 1000--2500 m. Bioregional Distribution: e KR (Quartz Valley), CaRH, MP; Distribution Outside California: to British Columbia, Rocky Mountains. Flowering Time: Apr--Sep
Synonyms: Geranium attenuilobum G.N. Jones & F.L. Jones
eFlora Treatment Author: Carlos Aedo
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botanical illustration including Geranium viscosissimum


Citation for this treatment: Carlos Aedo 2017. Geranium viscosissimum, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on October 19, 2017.

Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora,, accessed on October 19, 2017.

Geranium viscosissimum var. incisum
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© 2005 Christopher L. Christie
Geranium viscosissimum var. nervosum
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© 2015 Barry Breckling
Geranium viscosissimum var. nervosum
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© 2015 Barry Breckling
Geranium viscosissimum
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© 2009 Barry Breckling
Geranium viscosissimum
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© 1997 Christopher L. Christie
Geranium viscosissimum var. incisum
click for enlargement
© 2015 Barry Breckling

More photos of Geranium viscosissimum in CalPhotos

Geographic subdivisions for Geranium viscosissimum:
e KR (Quartz Valley), CaRH, MP;
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.
Blue line denotes eFlora flowering time.