Jepson Herbarium
		University of California, Berkeley

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Indexes to all accepted names and synonyms: | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |

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.
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

1 sp. (Greek, Latin: hard flax, for hard, generally indehiscent fruit) [Rogers 1966 Madroño 18:181–184] Closely related to Hesperolinon.

Annual.
Stem: erect, glabrous.
Leaf: opposite, 5–16 mm, oblong to elliptic, proximal generally entire, distal generally serrate; stipule glands 0.
Inflorescence: cyme; bracts generally serrate.
Flower: sepals unequal, margins gland-toothed; petals 5, yellow, appendages 0; staminodes 0; carpels 2, ovary chambers 4, styles 2, free, ± 1 mm; stigma > style in width, head-like.
Fruit: capsule surface rough; indehiscent or breaking into 4 closed, 1-seeded segments in age.
Seed: ± 1 mm, ± 3-sided in ×-section, tip acute.
Generally vernally moist meadows; 1000–1800 m. Klamath Ranges, Cascade Range, Sierra Nevada;

Previous taxon: Sclerolinon
Next taxon: Linnaeaceae

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Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].

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Bioregions in which taxon occurs	Red area (if present) is the part of the bioregion lying between the upper and lower elevation limits of the taxon; markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may have georeferencing or identification issues.
Chart based on elevation range in Manual and elevations and coordinates of CCH records. Data provided by the participants of the Consortium of California Herbaria. Note: About half of the CCH records include both elevation and coordinates.	Map made in collaboration with Scott Loarie. Data provided by the participants of the Consortium of California Herbaria. View all CCH records   CCH collections by month Duplicates counted once; synonyms included. Species do not include records of infraspecific taxa. Blue line denotes Manual flowering time.