Linum intercursum

E. P. Bicknell

Bull. Torrey Bot. Club 39: 418. 1912.

Common names: Sandplain flax Bicknell's yellow flax
Synonyms: Cathartolinum intercursum (E. P. Bicknell) Small
Treatment appears in FNA Volume 12. Treatment on page 382. Mentioned on page 378, 383.

Herbs or subshrubs, perennial, 20–92 cm, glabrous. Stems erect, unbranched proximal to inflorescence or few-branched at base. Leaves: proximalmost opposite, distalmost alternate, sometimes opposite nearly to inflorescence, erect to ascending; stipular glands absent; blade narrowly elliptic to oblanceolate, 8–27 × 1.2–5.6 mm, margins entire, not ciliate, apex acute; internal venation shown by transmitted light. Inflorescences panicles. Pedicels 0–5 mm. Flowers: sepals persistent, lanceolate, 2–3 mm, margins not scarious, entire, or inner and rarely outer sparsely glandular-toothed, apex sharp-pointed; petals yellow, obovate, 4–7 mm; stamens 3 mm; anthers 0.5–1 mm; staminodia absent; styles distinct, 1.5–2.5 mm; stigmas capitate. Capsules turbinate, 2–3 × 2–2.3 mm, apex acute or obtuse, dehiscing freely into 10, sharp-pointed 1-seeded segments, segments persistent on plant, false septa incomplete, proximal margins sparsely but conspicuously ciliate. Seeds 1.3–1.8 × 0.6–0.9 mm. 2n = 36.

Phenology: Flowering Jun–Oct.
Habitat: sometimes in alternately wet and dry, hardpan soils.
Elevation: 0–800 m.


V12 340-distribution-map.jpg

Ala., Conn., Del., D.C., Ga., Ind., Md., Mass., N.J., N.Y., N.C., Pa., R.I., S.C., Tenn., Va.


Linum intercursum is sometimes confused with L. floridanum, from which it differs by its pointed capsule and broader leaves. All parts of the flower of L. intercursum are yellow, and the corolla is nearly rotate.

Selected References


Lower Taxa

... more about "Linum intercursum"
Nancy R. Morin +
E. P. Bicknell +
Linopsis +
Sandplain flax +  and Bicknell's yellow flax +
Ala. +, Conn. +, Del. +, D.C. +, Ga. +, Ind. +, Md. +, Mass. +, N.J. +, N.Y. +, N.C. +, Pa. +, R.I. +, S.C. +, Tenn. +  and Va. +
0–800 m. +
sometimes in alternately wet and dry, hardpan soils. +
Flowering Jun–Oct. +
Bull. Torrey Bot. Club +
Cathartolinum intercursum +
Linum intercursum +
Linum sect. Linopsis +
species +