Spergularia diandra

(Gussone) Heldreich

Pl. Atticae unnumbered. 1851.

Common names:  Alkali sand-spurrey  
Introduced
Basionym: Arenaria diandra Gussone Fl. Sicul. Prodr. 1: 515. 1827
Synonyms: Spergularia salsuginea Fenzl
Treatment appears in FNA Volume 5. Treatment on page 19. Mentioned on page 17.

Plants annual, delicate, 5–15 cm, stipitate-glandular throughout or nearly so. Taproots slender. Stems erect to diffusely spreading, much-branched proximally and distally; main-stem 0.3–0.7 mm diam. proximally. Leaves: stipules inconspicuous, silvery to dull tan, broadly triangular, 1.5–2 mm, apex acuminate; blade linear, 0.6–2.3 cm, somewhat fleshy, apex blunt to apiculate; axillary leaf cluster usually absent. Cymes simple but commonly 4–8+-compound. Pedicels erect to reflexed in fruit. Flowers: sepals connate 0.2–0.5 mm proximally, lobes 1-veined or not, lanceolate to ovate, 2.3–3.1 mm, enlarging little in fruit, margins 0.1–0.3 mm wide, apex obtuse to rounded; petals white, elliptic to ovate, 0.7–0.8 times sepals; stamens 4–7; styles 0.4–0.6 mm. Capsules greenish tan, 2.5–2.8 mm, 0.9–1.2 times sepals. Seeds black, often with silvery, not iridescent tinge, with submarginal groove, pyriform, somewhat compressed, 0.4–0.6 mm, shiny, sculpturing of low, elongate tubercles, not papillate (40×); wing absent. 2n = 18 (Europe).


Phenology: Flowering spring–fall.
Habitat: Sandy beaches, river shores
Elevation: 600-700 m

Distribution

V5 26-distribution-map.gif

Introduced; Alta., B.C., Sask., Idaho, Mass., Oreg., Wash., Europe (Mediterranean region), sw, c Asia, n Africa, in Australia

Discussion

R. P. Rossbach’s (1940) report of Spergularia diandra from Georgia is referred to 9. S. echinosperma.

The name Spergularia diandra was effectively and validly published via an autographic label distributed in 1851, predating the other commonly seen attributions of this combination.

Selected References

None.

Lower Taxa

None.
... more about "Spergularia diandra"
perigynous +  and hypogynous +
obtuse;rounded +
Ronald L. Hartman +  and Richard K. Rabeler +
(Gussone) Heldreich +
Arenaria diandra +
threadlike +  and linear +
0.6 cm6 mm <br />0.006 m <br /> (2.3 cm23 mm <br />0.023 m <br />) +
smaller +
greenish tan +
0.9-1.2 times sepals +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.28 cm2.8 mm <br />0.0028 m <br />) +
 Alkali sand-spurrey   +
4-8+-compound +  and simple +
dish--shaped +
expanded +
Alta. +, B.C. +, Sask. +, Idaho +, Mass. +, Oreg. +, Wash. +, Europe (Mediterranean region) +, sw +, c Asia +, n Africa +  and in Australia +
600-700 m +
peripheral +
unisexual +  and bisexual +
stalked +  and simple +
Sandy beaches, river shores +
dish or cupshaped +
cup-shaped +  and dish +
0-8+-compound +, simple +  and branching +
cluster +  and opposite +
distinct +
not +  and 1-veined +
lanceolate +  and ovate +
enlarging +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
0.1mm +  and 0.3mm +
swollen +
3 +  and 5 +
crassinucellate +  and bitegmic +
campylotropous +
erect;reflexed +
perigynous +  and hypogynous +
fugacious +
elliptic +  and ovate +
0.7-0.8 times sepals +
Flowering spring–fall. +
Pl. Atticae +
partial +  and complete +
iridescent tinge;black +
not papillate +
compressed +  and pyriform +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
membranous +
not +  and hooded +
persistent +
lanceolate;ovate +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
Introduced +
4 +  and 7 +
much-branched +
erect;diffusely spreading +
[30 +  and 3 +
papillate +
silvery +  and dull tan +
inconspicuous +
triangular +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
nearly +  and distinct +
filiform +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
Spergularia salsuginea +
Spergularia diandra +
Spergularia +
species +
divided +
not rhizomatous +  and taprooted +
stipitate-glandular +