Linum bienne |
Linum rupestre |
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flax, narrow-leaf flax, pale flax |
rock flax |
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Habit | Herbs, biennial or short-lived perennial (flowering 1st year), 6–60 cm, glabrous. | Herbs, perennial, 20–75 cm, glabrous or rarely sparsely hairy proximally. |
Stems | erect, usually branched from near base and in inflorescence. |
erect, branched at base and in inflorescence. |
Leaves | blade linear to linear-lanceolate, 5–25 × 1–1.5 mm. |
opposite near base or alternate throughout, appressed-ascending; stipular glands present; blade linear to linear-lanceolate, 8–20 × 0.5–2.1 mm, margins entire or with scattered minute marginal glands, not ciliate, apex acute; 1-nerved. |
Inflorescences | open panicles. |
panicles, with ascending to spreading branches. |
Pedicels | 10–25 mm. |
0–3 mm. |
Flowers | homostylous; sepals ovate, 4–5.5 mm, margins of inner sepals minutely ciliate, outer glabrous, apex acute to acuminate; petals blue, obovate, 6–10 mm; stamens 4–5 mm; anthers 1–2.5 mm; staminodia present or absent; styles distinct, 2 mm; stigmas linear or clavate. |
sepals persistent, lanceolate to ovate, 2.5–5 mm, margins of inner sepals narrowly scarious, conspicuously glandular-toothed, apex acute or acuminate; petals lemon yellow, oblanceolate or narrowly obcordate, 7–11 mm; stamens 2–8 mm; anthers 0.5–1 mm; staminodia present; styles distinct, 3–6.5 mm; stigmas capitate. |
Capsules | broadly ovate to subglobose, 4–6 × 4–6 mm, apex very sharp-pointed, segments ± persistent on plant, margins ciliate. |
ovoid, 2–3 × 2–2.5 mm, apex sharp-pointed, dehiscing readily into 10, 1-seeded segments, segments falling freely, false septa incomplete, false and true septa margins ciliate. |
Seeds | 2.5–3 × 1.5–2 mm. |
1.2–1.9 × 0.7–1.1 mm. |
2n | = 30. |
= 36. |
Linum bienne |
Linum rupestre |
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Phenology | Flowering Mar–Aug. | Flowering Apr–Aug. |
Habitat | Grasslands, woodlands, disturbed places. | Sandy soils, rocky slopes and ledges, often on limestone. |
Elevation | 0–1900 m. (0–6200 ft.) | 150–1500 m. (500–4900 ft.) |
Distribution |
CA; OR; PA; BC; Europe; n Africa [Introduced in North America; introduced also in South America (Argentina, Chile), Pacific Islands (New Zealand)]
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NM; TX; Mexico (Chihuahua, Coahuila, Durango, Nuevo León); Central America (Guatemala)
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Discussion | Linum bienne is thought to be the progenitor of L. usitatissimum (D. J. Ockendon 1971). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Linum rupestre has narrowly funnelform corollas and yellow stamens and styles. The anthers and stigmas are held closely adjacent at the mouth of the corolla tube, below the broad, spreading limbs. The species occurs from southeastern New Mexico and central Texas to Guatemala. It often grows with L. schiedeanum in Texas and Mexico. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 12, p. 374. | FNA vol. 12, p. 381. |
Parent taxa | Linaceae > Linum > sect. Linum | Linaceae > Linum > sect. Linopsis |
Sibling taxa | ||
Synonyms | L. angustifolium | |
Name authority | Miller: Gard. Dict. ed. 8, Linum no. 8. (1768) | Engelmann ex A. Gray: Boston J. Nat. Hist. 6: 232. (1850) |
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