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Canada sand-spurrey, Canada sand-spurry, Canadian sand-spurrey, Canadian sand-spurry

greater sea-spurrey, media sandspurry, sand spurry, spergulaire marginée, spergulaire moyenne, stout sand-spurrey

Habit Plants annual, delicate to stout, 3–25 cm, glabrous or stipitate-glandular throughout or only in inflorescence.
Taproots

slender.

Stems

prostrate or decumbent to erect, usually branched proximally;

main stem usually 0.4–1.8 mm diam. proximally.

Leaves

stipules inconspicuous, dull white, broadly triangular, 1–2.8 mm, apex obtuse to acute;

blade linear, 1.5–4.5 cm, fleshy, apex ± blunt;

axillary leaf clusters mostly absent.

Pedicels

reflexed in fruit.

Flowers

sepals connate 0.5–0.6 mm proximally, lobes weakly 1-veined, ovate to elliptic-oblong, 2.2–3.5 mm, to 4.3–4.5 mm in fruit, margins 0.2–0.5 mm wide, apex ± acute to rounded;

petals white or pink, narrowly ovate, 0.9–1 times as long as sepals;

stamens 2–4;

styles 0.3–0.7 mm.

Capsules

greenish, 3.5–5.3 mm, 1.2–2 times as long as sepals.

Seeds

reddish brown, submarginal groove absent, broadly ovate, compressed, 0.9–1.4 mm, shiny, ± smooth, papillate;

wing absent or often present, whitish, 0.2–0.3 mm wide, margins irregular.

Cymes

simple to 2+-compound or flowers solitary and axillary.

Spergularia canadensis

Spergularia media

Distribution
from FNA
AK; CA; CT; MA; ME; NH; NY; OR; RI; WA; BC; NB; NF; NS; NU; ON; PE; QC; Coastal North America
[WildflowerSearch map]
[BONAP county map]
from FNA
CA; CO; IL; IN; MA; MI; MT; ND; NM; NY; OH; OR; PA; UT; WY; ON; QC; coastal Europe; Asia; Africa (Mediterranean region) [Introduced widely]
[WildflowerSearch map]
[BONAP county map]
Discussion

Varieties 2 (2 in the flora).

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Varieties 5 (1 in the flora).

Although a proposal to reject Spergularia media as a confused name (J. Lambinon 1981) was rejected, some authors still favor that argument, preferring to use the name S. maritima for this species.

Spergularia media is one of the “highway halophytes” (A. A. Reznicek 1980) that have spread along highways that are heavily salted during the winter, where saline areas have been created. Spergularia distribution has been investigated in Ohio (A. W. Cusick 1983), where such records were first noted in the early 1970s.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Key
1. Capsules 1.5-2 times as long as sepals; sepals 2.2-3.2 mm, to 4.5 mm in fruit, apex broadly rounded; stems prostrate or decumbent; plants glabrous except pedicels rarely stipitate-glandular
var. canadensis
1. Capsules 1.2-1.3 times as long as sepals; sepals 2.5-3.5 mm, to 4.3 mm in fruit, apex ± acute to narrowly obtuse; stems widely spreading to erect; plants glabrous or stipitate-glandular
var. occidentalis
Source FNA vol. 5, p. 20. FNA vol. 5, p. 21.
Parent taxa Caryophyllaceae > subfam. Polycarpoideae > Spergularia Caryophyllaceae > subfam. Polycarpoideae > Spergularia
Sibling taxa
S. atrosperma, S. bocconi, S. diandra, S. echinosperma, S. macrotheca, S. media, S. platensis, S. rubra, S. salina, S. villosa
S. atrosperma, S. bocconi, S. canadensis, S. diandra, S. echinosperma, S. macrotheca, S. platensis, S. rubra, S. salina, S. villosa
Subordinate taxa
S. canadensis var. canadensis, S. canadensis var. occidentalis
S. media var. media
Synonyms Arenaria canadensis Arenaria media
Name authority (Persoon) G. Don: Gen. Hist. 1: 426. (1831) (Linnaeus) C. Presl: Fl. Sicul. 161. (1826)
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