Linum harperi


Fl. S.E. U.S. 663, 1332. 1903.

Common names: Harper's flax
Synonyms: Cathartolinum harperi (Small) Small Linum sulcatum var. harperi (Small) C. M. Rogers
Treatment appears in FNA Volume 12. Treatment on page 386. Mentioned on page 379.

Herbs, annual, 25–85 cm, glabrous. Stems erect to ascending, unbranched proximally, few to many branched distal to middle. Leaves: proximal 0–13 pairs opposite (often fallen at anthesis), distal alternate, appressed-ascending; stipular glands usually present, very rarely absent; blade of proximal leaves oblanceolate or spatulate, of distal ones linear, 7–30 × 1–3 mm, margins entire, not ciliate, apex acute to subulate; midrib prominent, marginal nerves less conspicuous. Inflorescences racemelike; bracts glandular-toothed, not ciliate. Pedicels 1.3–4.7 mm. Flowers: sepals persistent, outer sepals oblong, 2.3–3.7 mm, margins not scarious, all very coarsely, irregularly glandular-toothed (inner sepals more closely and finely toothed than outer), apex acute; petals pale yellow, obovate, 5–10 mm; stamen length unknown; anthers 0.3–0.7 mm; staminodia absent; styles connate 0.2–1.8 mm at base, 2–4.5 mm; stigmas capitate. Capsules ovoid, 2.5–3.3 × 2.1–3 mm, apex rounded to acute, dehiscing freely into 10, sharp-pointed, 1-seeded segments, segments persistent on plant, false septa incomplete, margins prominently ciliate. Seeds 1.6–2.1 × 0.8–1.1 mm. 2n = 30.

Phenology: Flowering Jul–Aug.
Habitat: Dry pine barrens, clearings in pine flatwoods, calcareous soils or limestone outcrops.
Elevation: 0–100 m.


Dried plants of Linum harperi are dark purple-dotted distally. The species occurs in the center of the Florida panhandle, southwestern Georgia, and central Alabama.

Selected References


Lower Taxa

... more about "Linum harperi"
Nancy R. Morin +
Linopsis +
Harper's flax +
Ala. +, Fla. +  and Ga. +
0–100 m. +
Dry pine barrens, clearings in pine flatwoods, calcareous soils or limestone outcrops. +
Flowering Jul–Aug. +
Fl. S.E. U.S. +
Cathartolinum harperi +  and Linum sulcatum var. harperi +
Linum harperi +
Linum sect. Linopsis +
species +