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 adenophyllum (A. Gray) Small
NATIVE Habit: Plant 10--50 cm. Leaf: opposite or whorled proximally, lanceolate, keeled, clasping, margins with stalked, gland-tipped teeth in 1--3 rows. Inflorescence: bract margins with stalked, gland-tipped teeth in 1--3 rows; pedicels generally 5--15 mm. Flower: sepals 2--3 mm; petals 3--5 mm, yellow, often veined or tinged orange, fading white; stamens 4--5.5 mm, anthers yellow; ovary chambers 6, styles 3, 2.5--4 mm, yellow. Ecology: Serpentine, chaparral; Elevation: 150--1000 m. Bioregional Distribution: n&c NCoR (esp Lake, Mendocino cos.). Flowering Time: May--Aug 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 Next taxon: Hesperolinon bicarpellatum
Botanical illustration including Hesperolinon adenophyllum
Citation for this treatment: Joshua R. McDill 2012, Hesperolinon adenophyllum, in Jepson Flora Project (eds.) Jepson eFlora, https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=28036, accessed on April 18, 2024.
Citation for the whole project: Jepson Flora Project (eds.) 2024, Jepson eFlora, https://ucjeps.berkeley.edu/eflora/, accessed on April 18, 2024.
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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.
MAP LEGEND View all CCH records All markers link to CCH specimen records. The original determination is shown in the popup window.
Blue markers indicate specimens that map to one of the expected Jepson geographic subdivisions (see left map). Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
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CCH collections by month
Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time (fruiting time in some monocot genera).
