Minuartia decumbens

T. W. Nelson & J. P. Nelson

Brittonia 33: 162, fig. 1. 1981.

Common names: Lassicus stitchwort
EndemicConservation concern
Treatment appears in FNA Volume 5. Treatment on page 124. Mentioned on page 119, 129, 130, 133, 134.

Plants perennial, mat-forming. Taproots stout, woody. Stems ascending to erect, green, 4–15 cm, trailing stems to 30 cm, glabrous, internodes of flowering-stems ca. as long as leaves. Leaves overlapping proximally, all evenly spaced, connate proximally, with tight, scarious sheath 0.5–0.7 mm; blade arcuate, green, flat, 3-veined, needlelike to subulate, 3–6 (–9) × 0.7–2 mm, ± rigid, margins scarious proximally, apex green, blunt to ± acute, dull, glabrous; axillary leaves present among vegetative leaves. Inflorescences 5–20-flowered, open cymes; bracts narrowly lanceolate, herbaceous, thinly scarious-margined. Pedicels 0.5–2.5 cm, sparsely stipitate-glandular. Flowers: hypanthium dish-shaped; sepals (1-veined or) 3-veined, narrowly lanceolate (herbaceous portion narrowly lanceolate), 5–6 mm, not enlarging in fruit, apex often purple, acute to acuminate, not hooded, sparsely stipitate-glandular; petals broadly linear to oblongelliptic, 0.7–0.9 times as long as sepals, apex rounded, entire to slightly emarginate. Capsules ellipsoid, 4–4.8 mm, shorter than sepals. Seeds purplish brown, elliptic-oblong, ± compressed, 1.8–2.2 mm, tuberculate; tubercles low, rounded.


Phenology: Flowering spring–summer.
Habitat: Jeffrey pine woodlands, serpentine soils
Elevation: 1200-1500 m

Discussion

Of conservation concern.

Minuartia decumbens, like M. rosei and M. stolonifera, is restricted to serpentine soils of northwestern California, specifically to Mule Ridge in Trinity County. The three species are most closely related to the polymorphic M. nuttallii.

Selected References

None.

Lower Taxa

None.

"-0.9timesaslongassepals" is not declared as a valid unit of measurement for this property.

... more about "Minuartia decumbens"
entire +  and slightly emarginate +
stipitate-glandular +  and glabrous +
Richard K. Rabeler +, Ronald L. Hartman +  and Frederick H. Utech +
T. W. Nelson & J. P. Nelson +
0.6 cm6 mm <br />0.006 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
needlelike +  and subulate +
0.7mm;2mm +
scarious-margined +
lanceolate +
reduced +
scarious +  and herbaceous +
ellipsoid +
0.4 cm4 mm <br />0.004 m <br /> (0.48 cm4.8 mm <br />0.0048 m <br />) +
Lassicus stitchwort +
axillary +  and terminal +
dish--shaped +
expanded +
1200-1500 m +
straight +  and curved +
central +  and peripheral +
axillary +  and terminal +
inconspicuous +
unisexual +  and bisexual +
stalked +  and simple +
Jeffrey pine woodlands, serpentine soils +
disc--shaped +  and dish +
sessile +  and petiolate +
spaced +  and overlapping +
connate +
swollen +
3 +  and 5 +
crassinucellate +  and bitegmic +
campylotropous +
reflexed;erect;arcuate-spreading +
stipitate-glandular +
0.5 cm5 mm <br />0.005 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
Lilac (?) +, Pink (?) +  and White (?) +
fugacious +
Flowering spring–summer. +
tuberculate +
compressed +  and elliptic-oblong +
0.6 cm6 mm <br />0.006 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
persistent +
distinct +
lanceolate +
not enlarging +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
Endemic +  and Conservation concern +
branched +  and simple +
trailing;ascending;erect +
0 cm0 mm <br />0 m <br /> (30 cm300 mm <br />0.3 m <br />) +
[30 +  and 3 +
papillate +
distinct +
filiform +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
Alsinanthe +, Alsinopsis +, Lidia +, Minuopsis +, Porsildia +, Sabulina +, Tryphane +  and Wierzbickia +
Minuartia decumbens +
Minuartia +
species +
divided +
10 +  and 8 +
erect +  and recurved +
rhizomatous +  and taprooted +
plant +  and mat-forming +
pubescence of simple hairs or stalked glands +  and glabrous +
23 +, 15 +, 14 +, 13 +, 12 +, 10 +, 9 +  and 7 +