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flax, narrow-leaf flax, pale flax

desert flax, hairy flax, plains flax

Habit Herbs, biennial or short-lived perennial (flowering 1st year), 6–60 cm, glabrous. Herbs, annual or short-lived perennial, 4–25 cm, densely and finely gray-puberulent throughout.
Stems

erect, usually branched from near base and in inflorescence.

ascending, branched at base, herbaceous throughout.

Leaves

blade linear to linear-lanceolate, 5–25 × 1–1.5 mm.

alternate or sometimes proximal leaves opposite, appressed-ascending;

stipular glands present (conspicuous);

blade linear, 7–20 × 0.6–1.5 mm, margins entire or distal leaves sparsely glandular-toothed, ciliate, apex acute; 1-nerved.

Inflorescences

open panicles.

open panicles.

Pedicels

10–25 mm.

5–10 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 falling tardily, lanceolate, 4–7 mm, margins of inner sepals scarious, glandular-toothed, apex acute to acuminate, puberulent at least on midrib;

outer 3-nerved;

petals yellowish orange to salmon, with maroon or reddish base, obcordate or broadly obovate, 9–15 mm;

stamens 4–7 mm;

anthers 0.6–1.4 mm;

staminodia absent;

styles connate nearly to apex, 3–7 mm;

stigmas dark, capitate.

Capsules

broadly ovate to subglobose, 4–6 × 4–6 mm, apex very sharp-pointed, segments ± persistent on plant, margins ciliate.

ovoid-ellipsoid, 3.5–4 × 2.5–5 mm, apex obtuse, dehiscing into 5, 2-seeded segments, segments persistent on plant, false septa complete, proximal margin not terminating in loose fringe, distal part cartilaginous, margins ciliate.

Seeds

2.5–3 × 1.5–2 mm.

1.5–3 × 0.9–1.3 mm.

2n

= 30.

= 30.

Linum bienne

Linum puberulum

Phenology Flowering Mar–Aug. Flowering May–Oct.
Habitat Grasslands, woodlands, disturbed places. Dry, open areas, rocky, sandy, limestone, gypsum, or sometimes clay soils.
Elevation 0–1900 m. (0–6200 ft.) 300–2500 m. (1000–8200 ft.)
Distribution
from FNA
CA; OR; PA; BC; Europe; n Africa [Introduced in North America; introduced also in South America (Argentina, Chile), Pacific Islands (New Zealand)]
[WildflowerSearch map]
[BONAP county map]
from FNA
AZ; CA; CO; NE; NM; NV; TX; UT; WY; Mexico (Chihuahua, Coahuila, Sonora)
[WildflowerSearch map]
[BONAP county map]
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.)

Corollas of Linum puberulum are broadly bowl-shaped. The filaments and styles are pale pink; the stigmas are dark maroon. The pollen is bright yellow; on herbarium specimens, the anthers are golden yellow to orangish yellow, drying darker. In some flowers of L. puberulum, the styles seem to be eccentric. C. M. Rogers (1968) noted that L. puberulum is the only hairy species of Linum in western North America with united styles; its gray indument and complete false septa differentiate it from L. vernale, which is glabrous and has incomplete false septa. Linum puberulum is fairly common in the Rocky Mountain foothills and high plains; it occurs in the mountains in the eastern Mojave Desert.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 12, p. 374. FNA vol. 12, p. 388.
Parent taxa Linaceae > Linum > sect. Linum Linaceae > Linum > sect. Linopsis
Sibling taxa
L. alatum, L. allredii, L. arenicola, L. aristatum, L. australe, L. berlandieri, L. carteri, L. catharticum, L. compactum, L. elongatum, L. floridanum, L. grandiflorum, L. harperi, L. hudsonioides, L. imbricatum, L. intercursum, L. kingii, L. lewisii, L. lundellii, L. macrocarpum, L. medium, L. neomexicanum, L. perenne, L. pratense, L. puberulum, L. rigidum, L. rupestre, L. schiedeanum, L. striatum, L. subteres, L. sulcatum, L. trigynum, L. usitatissimum, L. vernale, L. virginianum, L. westii
L. alatum, L. allredii, L. arenicola, L. aristatum, L. australe, L. berlandieri, L. bienne, L. carteri, L. catharticum, L. compactum, L. elongatum, L. floridanum, L. grandiflorum, L. harperi, L. hudsonioides, L. imbricatum, L. intercursum, L. kingii, L. lewisii, L. lundellii, L. macrocarpum, L. medium, L. neomexicanum, L. perenne, L. pratense, L. rigidum, L. rupestre, L. schiedeanum, L. striatum, L. subteres, L. sulcatum, L. trigynum, L. usitatissimum, L. vernale, L. virginianum, L. westii
Synonyms L. angustifolium L. rigidum var. puberulum
Name authority Miller: Gard. Dict. ed. 8, Linum no. 8. (1768) (Engelmann) A. Heller: Pl. World 1: 22. (1897)
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