Linum schiedeanum

Schlechtendal & Chamisso

Linnaea 5: 234. 1830.

Common names: Schiede's flax
Treatment appears in FNA Volume 12. Treatment on page 380. Mentioned on page 378, 381.

Herbs, perennial, 20–70 cm, glabrous except for occasional hairs near nodes. Stems erect or spreading, branching at base and in inflorescence. Leaves: 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. Inflorescences panicles; bracts ciliate. Pedicels 0–1 mm. Flowers: 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. Capsules 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. Seeds 1–1.5 × 0.6–1 mm. 2n = 36.


Phenology: Flowering Jun–Aug.
Habitat: Open or semishaded areas, calcareous soils.
Elevation: 1200–2800 m.

Distribution

V12 277-distribution-map.jpg

N.Mex., Tex., e, ne, s Mexico

Discussion

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.

Selected References

None.

Lower Taxa

None.

"wider" is not a number.

... more about "Linum schiedeanum"
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
sharp-pointed +, acute +, deltate-acute +  and obtuse +
Nancy R. Morin +
Schlechtendal & Chamisso +
Linopsis +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
glandular-toothed +  and entire +
lanceolate;oblanceolate +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
divided +
Schiede's flax +
N.Mex. +, Tex. +, e +, ne +  and s Mexico +
1200–2800 m. +
incomplete +  and complete +
adnate +  and adherent +
spheric +
Open or semishaded areas, calcareous soils. +
occasional +
whorled +, opposite +  and alternate +
glandular-toothed +
extrastaminal +
apical-axile +, axile +  and placentation +
not +  and articulated +
0 cm0 mm <br />0 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
convolute +  and imbricate +
adnate +  and adherent +
lemon yellow +
coherent +  and distinct +
oblanceolate +  and narrowly obcordate +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Flowering Jun–Aug. +
multiporate +  and tricolpate +
alternate +  and whorled +
spreading +  and ascending +
mucilaginous +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
lenticular +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
persistent +
lanceolate +
unequal +
0.2 cm2 mm <br />0.002 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
spreading +  and erect +
ridged +  and terete +
clavate +, linear +  and capitate +
distinct +
0.16 cm1.6 mm <br />0.0016 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Mesyniopsis +
Linum schiedeanum +
Linum sect. Linopsis +
species +
adnate +  and adherent +
alternate +  and whorled +
18] +, [15 +  and 13 +