Linum rupestre
Linum schiedeanum
rock flax
Schied's flax, Schiede's flax
erect, branched at base and in inflorescence.
erect or spreading, branching at base and in inflorescence.
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.
proximal in whorls of 4, distal alternate, or mostly whorled or mostly alternate, spreading to ascending;
stipular glands present;
blade lanceolate to oblanceolate, 10–20 × 2–6 mm, margins entire, of distal leaves ciliate, apex deltate-acute to obtuse.
panicles, with ascending to spreading branches.
panicles;
bracts ciliate.
0–3 mm.
0–1 mm.
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.
sepals persistent, lanceolate, 2–3.5 mm, margins of inner sepals scarious, glandular-toothed, apex acute;
petals lemon yellow, oblanceolate to narrowly obcordate, 2.5–6 mm;
stamens 2–5 mm;
anthers 0.3–0.7 mm;
staminodia usually present, sometimes absent;
styles distinct, 1.6–3 mm;
stigmas capitate.
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.
broadly ovoid, 1.5–2.5 × 2–2.5 mm, apex sharp-pointed (easily crushed), readily dehiscing into 10, 1-seeded segments, segments falling freely, false septa rudimentary, margins of true septa usually ciliate.
1.2–1.9 × 0.7–1.1 mm.
1–1.5 × 0.6–1 mm.
= 36.
= 36.
Linum rupestre
Linum schiedeanum
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.)
Linum schiedeanum has yellow, broadly bowl-shaped corollas, yellow stamens, and yellow styles and stigmas. The styles are broadly incurved, following the line of the petals, and are held outside the ring of stamens. Staminodia in L. schiedeanum are low, deltoid, and usually two between adjacent stamens, sometimes one or none. J. R. McDill (2009) reported that L. schiedeanum formed a group (L. schiedeanum group) with four other species with whorled leaves occuring from the Guadalupe Mountains of western Texas south to Veracruz. C. M. Rogers (1984) noted that a compact form of L. schiedeanum from sunny areas might warrant more study.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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