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 (basally fused); 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: Adam C. Schneider, William A. Freyman, and Joshua R. McDill
Common Name: WESTERN FLAX Habit: Annual, erect, 3--50 cm, generally branched (at least in inflorescence). Leaf: generally alternate (occasionally opposite or whorled), generally sessile, 4--35 mm, 1--3(6) mm wide, thread-like or linear to ovate or obovate, margin gland-toothed or entire; stipular glands present or 0. Inflorescence: generally open or dense cyme, bracted; pedicel thread-like, generally ascending to erect. Flower: sepals lanceolate to ovate, acute or acuminate, glabrous or hairy, or margins glandular-ciliate; petals free, 1--12 mm, yellow, white, or pink, generally with small appendages near base; staminodes 0; carpels 2--3, stigmas linear (+- = style in width). Fruit: smooth. Seed: +- triangular in ×-section, acute. Etymology: (Greek, Latin: western flax) Note:Hesperolinon serpentinum, used in TJM (1993), is not validly published. eFlora Treatment Author: Joshua R. McDill Reference: Sharsmith 1961 Univ Calif Publ Bot 32:235--314
Hesperolinon bicarpellatum (H. Sharsm.) H. Sharsm.
NATIVE Habit: Plant 10--30 cm, generally +- glabrous, except just distal to nodes. Leaf: alternate, thread-like to linear, flat, not clasping. Inflorescence: +- equally forked; pedicels 2--12 mm. Flower: sepals 1.5--3 mm; petals 2--4 mm, yellow; stamens 3--5 mm, anthers yellow; ovary chambers 4, styles 2(3), 2--3.5 mm, yellow. Chromosomes: n=17. Ecology: Serpentine, chaparral; Elevation: 60--1000 m. Bioregional Distribution: s NCoRI. Flowering Time: May--Jul Note: If recognized taxonomically, plants with conspicuous stipular glands and 3-carpellate flowers in Lake, Napa cos. assignable to Hesperolinon sharsmithiae R. O'Donnell [O'Donnell 2006 Madroño 53:404--408]. Hesperolinon sharsmithiae Listed in CNPS Inventory. Jepson eFlora Author: Joshua R. McDill Reference: Sharsmith 1961 Univ Calif Publ Bot 32:235--314 Index of California Plant Names (ICPN; linked via the Jepson Online Interchange) Listed on CNPS Rare Plant Inventory Previous taxon: Hesperolinon adenophyllum Next taxon: Hesperolinon breweri
Citation for this treatment: Joshua R. McDill 2012, Hesperolinon bicarpellatum, in Jepson Flora Project (eds.) Jepson eFlora, https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=28037, accessed on April 16, 2024.
Citation for the whole project: Jepson Flora Project (eds.) 2024, Jepson eFlora, https://ucjeps.berkeley.edu/eflora/, accessed on April 16, 2024.
No expert verified images found for Hesperolinon bicarpellatum.
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(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).
Data provided by the participants of the
Consortium of California Herbaria.
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Duplicates counted once; synonyms included.
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Blue line denotes eFlora flowering time (fruiting time in some monocot genera).
