Linum trigynum

Linnaeus

Sp. Pl. 1: 279. 1753.

Common names: French flax
Introduced
Synonyms: Linum gallicum Linnaeus
Treatment appears in FNA Volume 12. Treatment on page 394. Mentioned on page 378.

Herbs, annual, 10–50 cm, glabrous. Stems erect or spreading, few-branched. Leaves alternate, spreading to ascending; stipular glands absent; blade linear-lanceolate to narrowly elliptic, 5–10 × 1–1.5 mm, margins entire, not ciliate, apex acuminate. Inflorescences panicles. Pedicels 1–5 mm. Flowers: sepals persistent, lanceolate to ovate, 3–4 mm, margins of inner sepals broadly scarious, densely glandular-ciliate, glandular-toothed, apex acuminate to setaceous; petals lemon yellow, oblong to obovate, 4–6 mm; stamens 1.5 mm; anthers 0.3 mm; staminodia present or absent; styles distinct, 1 mm; stigmas linear. Capsules subglobose, 2 mm diam., apex sharp-pointed (easily crushed), readily dehiscing into 5, 2-seeded segments, segments persistent on plant, false septa incomplete, margins of true septa ciliate. Seeds 1.1 × 0.9–1 mm. 2n = 20.


Phenology: Flowering May–Jul.
Habitat: Grasslands.
Elevation: 100–200 m.

Distribution

V12 171-distribution-map.jpg

Introduced; Calif., s Europe, w Asia, n Africa, also in Pacific Islands (Hawaii), also in Pacific Islands (New Zealand), Australia

Discussion

Linum trigynum is one of three species in sect. Linopsis subsect. Halolinum (Planchon) C. M. Rogers. This section is characterized as having separate styles, linear stigmas, and incomplete false septa. Linum trigynum is homostylous; the other two species, L. maritimum Linnaeus and L. tenue Desfontaines, are heterostylous. Two populations of L. trigynum have been reported in Sonoma County on the Jenner and Fort Ross State Historic Park headlands, both with hundreds of individuals and apparently persisting. Where native, the species sometimes occurs on serpentine soils, and it is reported as a weed in western Australia.

Selected References

None.

Lower Taxa

None.

"wider" is not a number.

... more about "Linum trigynum"
0.3 cm3 mm <br />0.003 m <br /> (?) +
sharp-pointed +, acuminate +  and setaceous +
Nancy R. Morin +
Linnaeus +
Linopsis +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
glandular-toothed +  and entire +
linear-lanceolate;narrowly elliptic +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
2 cm20 mm <br />0.02 m <br /> (?) +
subglobose +
divided +
French flax +
Calif. +, s Europe +, w Asia +, n Africa +, also in Pacific Islands (Hawaii) +, also in Pacific Islands (New Zealand) +  and Australia +
100–200 m. +
adnate +  and adherent +
spheric +
Grasslands. +
spreading +  and ascending +
glandular-ciliate +
glandular-toothed +
extrastaminal +
apical-axile +, axile +  and placentation +
not +  and articulated +
0.1 cm1 mm <br />0.001 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
convolute +  and imbricate +
adnate +  and adherent +
lemon yellow +
coherent +  and distinct +
oblong +  and obovate +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Flowering May–Jul. +
multiporate +  and tricolpate +
mucilaginous +
1.1 cm11 mm <br />0.011 m <br /> (?) +
lenticular +
0.09 cm0.9 mm <br />9.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
persistent +
lanceolate +  and ovate +
unequal +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Introduced +
1.5 cm15 mm <br />0.015 m <br /> (?) +
few-branched +
spreading +  and erect +
ridged +  and terete +
clavate +, linear +  and capitate +
distinct +
1 cm10 mm <br />0.01 m <br /> (?) +
Linum gallicum +
Linum trigynum +
Linum sect. Linopsis +
species +
adnate +  and adherent +
18] +, [15 +  and 13 +