Linum catharticum

Linnaeus

Sp. Pl. 1: 281. 1753.

Common names: Fairy or purging flax lin purgatif
WeedyIntroduced
Treatment appears in FNA Volume 12. Treatment on page 377.

Herbs, 8–30 cm, glabrous. Stems erect, usually unbranched proximal to inflorescence, sometimes branched from decumbent base. Leaves: blade narrowly elliptic to oblanceolate or narrowly obovate or oblong, larger 5–18 × 1.4–3.1 mm, largest at midstem, reduced in size both proximally and distally, apex obtuse to acute. Inflorescences panicles. Pedicels 6–35 mm. Flowers: sepals broadly lanceolate to ovate, outer sepals 2–3 mm, inner sepals broader, shorter, margins of all or sometimes only of inner sparsely but conspicuously glandular-toothed, apex acute to acuminate; petals white or whitish, base yellowish, 2–5 mm, obovate; stamens 1 mm, anthers 0.2–0.3 mm; styles 0.5–1 mm. Capsules ovoid, 2–2.5 × 2 mm, fragile and subject to crushing when pressed; segments persistent on plant, septa margins ciliate. Seeds 1–1.5 × 0.6–0.8 mm. 2n = 16.


Phenology: Flowering Jun–Aug.
Habitat: Calcareous or sandy soils, fields, pastures, roadsides.
Elevation: 0–400 m.

Distribution

V12 484-distribution-map.jpg

Introduced; B.C., N.B., Nfld. and Labr. (Nfld.), N.S., Ont., P.E.I., Que., Maine, Mass., Mich., N.H., N.Y., Pa., Vt., Europe, w Asia, Atlantic Islands (Iceland), also in South America (Argentina), Pacific Islands (New Zealand), Australia (Tasmania)

Discussion

Linum catharticum has small, white, funnelform corollas, yellow anthers, and light green stigmas. It is the only Linum in the flora area with white petals and opposite leaves. The species is widespread in Europe and occurs only sporadically in the northern United States and most of its range in Canada. It may be native in Newfoundland and Nova Scotia, where it is well established.

Selected References

None.

Lower Taxa

None.

"broader" is not a number.

... more about "Linum catharticum"
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
Acute (?) +  and Acuminate (?) +
Nancy R. Morin +
Linnaeus +
obovate +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Cathartolinum +
0.5 cm5 mm <br />0.005 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
not glandular-toothed +
narrowly elliptic;oblanceolate or narrowly obovate or oblong +
largest +  and larger +
1.4mm;3.1mm +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
2 cm20 mm <br />0.02 m <br /> (?) +
divided +
Fairy or purging flax +  and lin purgatif +
B.C. +, N.B. +, Nfld. and Labr. (Nfld.) +, N.S. +, Ont. +, P.E.I. +, Que. +, Maine +, Mass. +, Mich. +, N.H. +, N.Y. +, Pa. +, Vt. +, Europe +, w Asia +, Atlantic Islands (Iceland) +, also in South America (Argentina) +, Pacific Islands (New Zealand) +  and Australia (Tasmania) +
0–400 m. +
adnate +  and adherent +
spheric +
Calcareous or sandy soils, fields, pastures, roadsides. +
glandular-toothed +
extrastaminal +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
apical-axile +, axile +  and placentation +
not +  and articulated +
0.6 cm6 mm <br />0.006 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
convolute +  and imbricate +
adnate +  and adherent +
coherent +  and distinct +
Flowering Jun–Aug. +
mucilaginous +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
lenticular +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
persistent +
broadly lanceolate +  and ovate +
unequal +
Weedy +  and Introduced +
branched +  and unbranched +
clavate +, linear +  and capitate +
distinct +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Linum catharticum +
Linum sect. Cathartolinum +
species +
adnate +  and adherent +
18] +, [15 +  and 13 +