Linum macrocarpum

C. M. Rogers

Brittonia 15: 109, fig. 3(1–4). 1963.

Common names: Spring Hill flax
EndemicConservation concern
Treatment appears in FNA Volume 12. Treatment on page 382. Mentioned on page 378, 383, 384.

Herbs, perennial, 60–150 cm, glabrous. Stems erect, unbranched below inflorescence. Leaves: proximal opposite, distal alternate, ascending; stipular glands absent; blade of cauline leaves narrowly elliptic or linear-oblanceolate, 23 × 4 mm, margins entire, not ciliate, apex acute or apiculate. Inflorescences panicles. Pedicels 0–2.5 mm. Flowers: sepals persistent, lanceolate or oblanceolate to obovate, 2.8–3.8 mm, inner broader, somewhat shorter than outer, margins not scarious, entire, apex apiculate; petals yellow, obovate, 8–11 mm; stamens 6 mm; anthers 0.8 mm; staminodia absent; styles distinct, length unknown; stigmas capitate. Capsules ovoid, 3.4–3.9 × 3.2–3.5 mm, apex obtuse, dehiscing freely into 10, 1-seeded segments, segments persistent on plant, falling tardily, false septa nearly complete, proximal margins very sparsely and inconspicuously ciliate. Seeds 2.8–3 × 1.2 mm.


Phenology: Flowering May–Jul.
Habitat: Pitcher-plant seepage bogs, wet longleaf and/or slash pine flatwoods and savannas.
Elevation: 0–30 m.

Discussion

Linum macrocarpum is known only from about 20 populations in Bay, Franklin, and Okaloosa counties in Florida; St. Tammany Parish in Louisiana; Hancock, Harrison, Jackson, and Stone counties in Mississippi; and Baldwin, Escambia, Mobile, and Washington counties in Alabama. Its range overlaps both varieties of L. floridanum, but L. macrocarpum may be distinguished by its larger capsules, larger seeds, and usually taller stems (B. A. Sorrie, pers. comm.).

Selected References

None.

Lower Taxa

None.

"broader" is not a number."wider" is not a number.

... more about "Linum macrocarpum"
0.8 cm8 mm <br />0.008 m <br /> (?) +
obtuse +, apiculate +  and acute +
Nancy R. Morin +
C. M. Rogers +
Linopsis +
23 cm230 mm <br />0.23 m <br /> (?) +
glandular-toothed +  and entire +
linear-oblanceolate;elliptic +
4 cm40 mm <br />0.04 m <br /> (?) +
0.34 cm3.4 mm <br />0.0034 m <br /> (0.39 cm3.9 mm <br />0.0039 m <br />) +
0.32 cm3.2 mm <br />0.0032 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
divided +
Spring Hill flax +
Ala. +, Fla. +, La. +  and Miss. +
0–30 m. +
adnate +  and adherent +
spheric +
Pitcher-plant seepage bogs, wet longleaf and/or slash pine flatwoods and savannas. +
whorled +, opposite +  and alternate +
not +  and glandular-toothed +
not scarious +
extrastaminal +
apical-axile +, axile +  and placentation +
not +  and articulated +
0 cm0 mm <br />0 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
convolute +  and imbricate +
adnate +  and adherent +
coherent +  and distinct +
obovate +
0.8 cm8 mm <br />0.008 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
Flowering May–Jul. +
multiporate +  and tricolpate +
mucilaginous +
0.28 cm2.8 mm <br />0.0028 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
lenticular +
1.2 cm12 mm <br />0.012 m <br /> (?) +
persistent +
oblanceolate +  and obovate +
unequal +
0.28 cm2.8 mm <br />0.0028 m <br /> (0.38 cm3.8 mm <br />0.0038 m <br />) +
Endemic +  and Conservation concern +
6 cm60 mm <br />0.06 m <br /> (?) +
ridged +  and terete +
clavate +, linear +  and capitate +
distinct +
Mesyniopsis +
Linum macrocarpum +
Linum sect. Linopsis +
species +
adnate +  and adherent +
18] +, [15 +  and 13 +