Jepson Flora Project: Jepson Interchange    

 
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Jepson Interchange (more information)
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  • Up-to-date information about California vascular plants is available from the Jepson eFlora.

LINACEAE

FLAX FAMILY

Niall F. McCarten

Annual, perennial herb, shrub
Stem generally erect, branched, glabrous, hairy, or glandular
Leaves generally cauline, alternate, opposite, or whorled, simple, sessile, generally linear to ovate; stipules glandular or 0
Inflorescence: raceme or cyme, axillary, open to dense
Flower generally bisexual, radial, nodding in bud; sepals 4–5, free, glabrous, hairy, or margins gland-toothed; petals 4–5, free, blue, white, yellow, or pink, ephemeral; stamens 4–5, alternate petals, generally appendaged; staminodes alternate stamens or 0; ovary superior, chambers 2–5 but becoming 4–10 by growth of false septa, styles 2–5
Fruit: generally capsule
Genera in family: 13 genera, 300 species: worldwide, especially temp; some cultivated (Linum usitatissimum , flax, linseed; L. bienne, L. grandiflorum , ornamental)
Reference: [Robertson 1971 J Arnold Arbor 52: 649–665]

SCLEROLINON


Species in genus: 1 sp
Etymology: (Greek & Latin: hard flax, from fruit walls)
Reference: [Rogers 1966 Madroño 18:181–184]
Segregated from Linum.

Native

S. digynum (A. Gray) C. Rogers

Annual, glabrous
Stem erect, 5–20 cm
Leaves opposite, ± erect, 5–16 mm, oblong; lower leaves entire; upper leaves serrate; stipules 0
Inflorescence: cyme, dense; bracts leaf-like; pedicels < 3 mm
Flower: sepals 5, 2–3 mm, unequal, margins gland-toothed; petals 5, 3–4 mm, unappendaged, yellow; stamens 5, unappendaged; ovary chambers 4, styles 2, free, 1 mm, stigmas > styles in width
Fruit: nutlets 4; surfaces rough
Seed ± 1 mm
Chromosomes: n=8
Ecology: Generally moist meadows
Elevation: 1000–1800 m.
Bioregional distribution: Klamath Ranges, Cascade Range, Sierra Nevada
Distribution outside California: to Washington, Idaho

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