Arenaria serpyllifolia

Linnaeus

Sp. Pl. 1: 423. 1753.

Common names: Thymeleaf sandwort sabline á feuilles de serpolet
WeedyIntroduced
Treatment appears in FNA Volume 5. Treatment on page 55. Mentioned on page 51, 56.

Plants annual. Taproots filiform. Stems 1–100+, erect to ascending or sprawling, green, 3–40+ cm; internodes terete to ellipsoid, 2–8 times as long as leaves, dull, retrorsely pubescent throughout, sometimes also stipitate-glandular. Leaves often connate basally, with scarious or mostly herbaceous sheath 0.2–0.3 mm, petiolate (proximal leaves) or usually sessile; petiole 1–4 mm; blade 3–5 veined, elliptic to broadly ovate or rarely orbiculate, 2–7 × 1–4 mm, herbaceous, margins flat, herbaceous, dull, ciliate especially proximally, apex acute to acuminate, pustulate, sparsely minutely pubescent or glabrous; axillary leaf clusters absent. Inflorescences terminal, open, leafy, 3–50+-flowered cymes. Pedicels erect or ascending in fruit, 1–12 mm, retrorsely pubescent. Flowers: sepals green, often prominently 3-veined, not keeled, lanceolate to ovatelanceolate (herbaceous portion narrowly elliptic to broadly lanceolate), 2–3 mm, to 4 mm in fruit, apex narrowly acute to acuminate, ± minutely pustulate, stipitate-glandular; petals oblong, 0.6–2.7 mm, 1/5–3/4 times as long as sepals, apex obtuse to rounded. Capsules loosely enclosed by calyx, ovoid to cylindric-ovoid, 3–3.5 mm, 4/5–11/5 times as long as sepals. Seeds 10–15, ashy black, reniform, plump, 0.4–0.6 mm, not shiny, with low-elongate, prominent tubercules.

Distribution

V5 111-distribution-map.gif

Introduced; Alta., B.C., Man., N.B., N.S., Ont., P.E.I., Que., Sask., Ala., Ark., Calif., Colo., Conn., D.C., Del., Fla., Ga., Idaho, Ill., Ind., Iowa, Kans., Ky., La., Maine, Mass., Md., Mich., Minn., Miss., Mo., Mont., N.C., N.H., N.J., N.Mex., N.Y., Nebr., Nev., Ohio, Okla., Pa., R.I., S.C., S.Dak., Tenn., Tex., Utah, Va., Vt., W.Va., Wash., Wis., Wyo., North America, Eurasia, Africa, in Australia

Discussion

Varieties 3+ (2 in the flora).

Variation in Arenaria serpyllifolia in the broad sense is treated in various ways. The two varieties recognized here have been treated also as subspecies (e.g., A. O. Chater and G. Halliday 1993) or species (e.g., M. N. Abuhadra 2000; B. Jonsell 2001). Jonsell admitted that accepting them as species is questionable; while the morphological differences are slight (see esp. Abuhadra), the ploidy-level difference (2n = 40 in var. serpyllifolia vs. 2n = 20 in var. tenuior) is important.

Selected References

None.

Key

1 Capsules ovoid to ovoid-conic, broader at base; seeds 0.5-0.6 mm Arenaria serpyllifolia var. serpyllifolia
1 Capsules cylindric to cylindric-ovoid, not significantly broader at base (walls nearly straight); seeds ca. 0.4 mm Arenaria serpyllifolia var. tenuior

"/5-11/5timesaslongassepals" is not declared as a valid unit of measurement for this property."-8timesaslongasleaves" is not declared as a valid unit of measurement for this property."/5-3/4timesaslongassepals" is not declared as a valid unit of measurement for this property.

... more about "Arenaria serpyllifolia"
stipitate-glandular +, glabrous +  and pubescent +
pustulate +
Ronald L. Hartman +, Richard K. Rabeler +  and Frederick H. Utech +
Linnaeus +
Laciniate (?) +, Emarginate (?) +, Jagged (?) +, 2-fid (?) +  and Entire (?) +
0.2 cm2 mm <br />0.002 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
elliptic +  and broadly ovate or rarely orbiculate +
1mm;4mm +
smaller +
herbaceous +  and scarious +
ovoid;cylindric-ovoid +
0.3 cm3 mm <br />0.003 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
Thymeleaf sandwort +  and sabline á feuilles de serpolet +
3-50+-flowered +
dish--shaped +
expanded +
Alta. +, B.C. +, Man. +, N.B. +, N.S. +, Ont. +, P.E.I. +, Que. +, Sask. +, Ala. +, Ark. +, Calif. +, Colo. +, Conn. +, D.C. +, Del. +, Fla. +, Ga. +, Idaho +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, La. +, Maine +, Mass. +, Md. +, Mich. +, Minn. +, Miss. +, Mo. +, Mont. +, N.C. +, N.H. +, N.J. +, N.Mex. +, N.Y. +, Nebr. +, Nev. +, Ohio +, Okla. +, Pa. +, R.I. +, S.C. +, S.Dak. +, Tenn. +, Tex. +, Utah +, Va. +, Vt. +, W.Va. +, Wash. +, Wis. +, Wyo. +, North America +, Eurasia +, Africa +  and in Australia +
straight +  and curved +
central +  and peripheral +
inconspicuous +
unisexual +  and bisexual +
stalked +  and simple +
disc--shaped +  and dish +
leafy +  and open +
stipitate-glandular +  and pubescent +
terete +  and ellipsoid +
sessile +  and petiolate +
connate +
swollen +
3 +  and 5 +
crassinucellate +  and bitegmic +
campylotropous +
ascending;erect +
0.1 cm1 mm <br />0.001 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
fugacious +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.27 cm2.7 mm <br />0.0027 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
tuberculate +, rugulose +  and smooth +
reniform +
persistent +
connate +  and distinct +
lanceolate;ovatelanceolate +
0 cm0 mm <br />0 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
herbaceous +  and scarious +
Weedy +  and Introduced +
grooved +, branched +  and simple +
erect;ascending or sprawling +
terete;ellipsoid +
3 cm30 mm <br />0.03 m <br /> (40 cm400 mm <br />0.4 m <br />) +
[30 +  and 3 +
papillate +
distinct +
filiform +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Spergulastrum +
Arenaria serpyllifolia +
Arenaria +
species +
ascending;recurved +
divided +
low-elongate +
10 +  and 8 +
rhizomatous +  and taprooted +
pubescence of simple hairs or stalked glands +  and glabrous +
11 +, 10 +, 8 +  and [7 +