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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.
Perennial herb. Stem: 5–80 cm, glabrous. Leaf: 10–20 mm, linear to lanceolate or narrowly oblanceolate, glabrous; stipular glands 0. Flower: sepals 4–6 mm, margins entire, generally translucent; petals 6–15 mm, obovate, blue, occasionally white or mottled white; styles separate, generally >= stamen length, stigmas head-like, ± spheric. Fruit: 5–6 mm wide, dehiscent, segments 10, ± adherent. Seed: 3–5 mm, dark brown to black.
2n=18. Generally dry open areas in mtns, foothills; < 3660 m. California Floristic Province, Modoc Plateau, White and Inyo Mountains, Desert; to Alaska, Mississippi Valley. [Linum lewisii var. alpicola Jeps.] Apr–Jul [Online Interchange]
Unabridged synonyms: [Linum perenne subsp. lewisii (Pursh) Hultén]
Unabridged note: Ornamental cultivars of Europe native Linum perenne L. occasionally encountered, having styles >> or << stamen length; in California not well documented beyond cultivated.
Previous taxon: Linum grandiflorum
Next taxon: Linum puberulum
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Aug 1 2014
Citation for this treatment: [Author of taxon treatment] 2013. Linum, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=60912, accessed on Aug 1 2014
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