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Linum bienne

Higher Taxonomy
Family: LinaceaeView DescriptionDichotomous Key

Common Name: FLAX FAMILY
Habit: Annual, perennial herb [shrub, tree, vine]. Stem: generally erect [climbing], branched, glabrous to hairy. Leaf: cauline, alternate to opposite or whorled, simple, generally sessile, linear to obovate, entire to minutely toothed or ciliate, teeth occasionally gland-tipped; stipules small, dark-colored, spheric glands, or 0. Inflorescence: raceme, panicle, or cyme [spike]. Flower: bisexual, radial; sepals [4]5, free; petals = sepals in number, free to adherent; stamens 5[4 or 10], alternate petals, filaments fused basally into a cup-like structure surrounding ovary base; staminodes present, alt stamens at cup rim, or 0; ovary superior, carpels 2--5, fused, styles 2--5, = carpel number, free or partly fused. Fruit: capsule, generally dehiscent [drupe in some tropical species], generally 10-seeded.
Genera In Family: 13 genera, +- 250 species: cosmopolitan, most temperate, some cultivated. Note: Hesperolinon, Sclerolinon are evolutionary lineages within Linum.
eFlora Treatment Author: Joshua R. McDill
Scientific Editor: Douglas H. Goldman, Robert Patterson, Bruce G. Baldwin.
Genus: LinumView DescriptionDichotomous Key

Common Name: FLAX
Habit: Annual, perennial herb. Leaf: generally alternate, occasionally partially opposite [whorled], +- sessile, generally glabrous; stipule glands present or 0. Inflorescence: raceme or cyme. Flower: inner 2 sepals overlapped by outer 3, all margins generally translucent, generally ciliate or toothed, glandular or not; petals 5--25 mm, generally ephemeral; staminodes 0 or 5; carpels 5, ovary chambers 10, styles free or fused, stigmas 5, >= style width. Fruit: 3--10 mm diam, generally spheric, dehiscent, generally 5 or 10 segmented. Seed: 5 or 10, lens-shaped, rounded, brown to black, generally glossy.
Species In Genus: +- 180 species: temperate & subtropics, especially Eurasia and North America. Etymology: (Latin: flax) Note: Linum usitatissimum cultivated for fiber (linen) and seed for oil and food; Linum perenne, Linum grandiflorum, ornamental; some Eurasian species used in cancer treatment.

Linum bienne Mill.
Habit: Biennial to weak perennial herb, 6--60 cm. Stem: glabrous. Leaf: 5--25 mm, linear to lance-linear; stipule glands 0. Flower: sepals 4--5 mm, ovate to lanceolate, margins translucent, inner sepals minutely ciliate or toothed; petals light blue, 6--10 mm; styles free, generally <= 2 mm, stigmas linear to club-shaped. Fruit: 4--6 mm wide, dehiscing into 10 +- adherent segments. Seed: 2--3 mm, dark brown to black. Chromosomes: n=15.
Ecology: Garden escape; grassland, woodland, disturbed places, especially coastal; Elevation: < 1000 m. Bioregional Distribution: NW, CaRF, n SNF, GV, CW; Distribution Outside California: native to Eurasia. Flowering Time: Mar--Jun Note: Generally considered progenitor of cultivation flax, Linum usitatissimum.
Synonyms: Linum angustifolium Huds.
eFlora Treatment Author: Joshua R. McDill
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Citation for this treatment: Joshua R. McDill 2017. Linum bienne, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on October 21, 2017.

Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora,, accessed on October 21, 2017.

Linum bienne
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© 2007 Steve Matson
Linum bienne
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© 2007 Steve Matson
Linum bienne
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© 2007 Neal Kramer
Linum bienne
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© 2008 Keir Morse
Linum bienne
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© 2015 Barry Breckling
Linum bienne
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© 2010 Neal Kramer

More photos of Linum bienne in CalPhotos

Geographic subdivisions for Linum bienne:
NW, CaRF, n SNF, GV, CW;
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.