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Key to families | Table of families and genera
Indexes to all accepted names and synonyms:
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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 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.
13 genera, ± 250 species: cosmopolitan, most temperate, some cultivated. [McDill et al. 2009 Syst Bot 34:386–405] Hesperolinon, Sclerolinon are evolutionary lineages within Linum. —Scientific Editors: Douglas H. Goldman, Robert Patterson, Bruce G. Baldwin.
Unabridged references: [Robertson 1971 J Arnold Arbor 52:649–665]
Key to Linaceae
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.Key to Linum
± 180 species: temperate & subtropics, especially Eurasia and North America. (Latin: flax) [Rogers 1984 North Amer Flora Ser II 12:1–56] Linum usitatissimum cultivated for fiber (linen) and seed for oil and food; Linum perenne, Linum grandiflorum, ornamental; some Eurasian species used in cancer treatment.
Annual 10–60 cm. Stem: glabrous. Leaf: 10–20 mm, lanceolate, generally glaucous; stipule glands 0. Flower: sepals 7–10 mm, lanceolate, margins conspicuously ciliate; petals bright red to maroon, 15–30 mm; styles free, stigmas linear. Fruit: dehiscent, 10 ± adherent segments. Seed: 2–3 mm, brown.
n=8. Grassland, disturbed places; < 1000 m. North Coast, North Coast Ranges, Central Western California (except Inner South Coast Ranges), South Coast, Western Transverse Ranges, San Bernardino Mountains, Peninsular Ranges; native to northern Africa. Uncommon beyond cultivated; occasionally included in commercial wildflower seed packets in United States. Apr–Jul [Online Interchange]
Previous taxon: Linum bienne
Next taxon: Linum lewisii var. lewisii
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Apr 19 2014
Citation for this treatment: [Author of taxon treatment] 2012. Linum, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=31151, accessed on Apr 19 2014
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