Spergularia macrotheca

(Hornemann ex Chamisso & Schlechtendal) Heynhold

Alph. Aufz. Gew. 689. 1846.

Common names:  Sticky sand-spurrey
Basionym: Arenaria macrotheca Hornemann ex Chamisso & Schlechtendal Linnaea 1: 53. 1826
Treatment appears in FNA Volume 5. Treatment on page 18. Mentioned on page 17.

Plants strongly perennial with branched, woody base, stout, 5–40 cm, densely stipitate-glandular in inflorescence or throughout. Taproots becoming stout, woody. Stems erect or ascending to prostrate, usually branched proximally; main stem 0.8–3 mm diam. proximally. Leaves: stipules conspicuous, dull white to tan, narrowly triangular, 4.5–11 mm, apex long-acuminate; blade linear, (0.6–)1–5.5 cm, fleshy, apex apiculate to spine-tipped; axillary leaves 1–2+ per cluster. Cymes simple to 3-compound or flowers solitary and axillary. Pedicels erect, divergent, or reflexed in fruit. Flowers: sepals connate 0.5–1.8 mm proximally, lobes often 3-veined, ovate to lanceolate, 4.5–7 mm, to 8 mm in fruit, margins 0.3–0.7 mm wide, apex blunt to rounded; petals white or pink to rosy, elliptic to obovate, 0.9–1.3 times as long as sepals in flower; stamens 9–10; styles 0.6–3 mm. Capsules tan, 4.6–10 mm, 0.8–1.4 times as long as sepals. Seeds ± red-brown, often with submarginal groove or depression, suborbiculate to pyriform, compressed, (0.6–)0.7–1.2 mm, smooth to faintly or prominently tuberculate or sculpturing of parallel, wavy lines or of low, rounded mounds, not papillate; wing absent or white to reddish brown proximally, 0.1–0.3 mm wide, margins irregular.


V5 21-distribution-map.gif

B.C., Calif., Oreg., Wash., including nw Mexico.


Varieties 3 (3 in the flora).

Selected References



1 Petals pink to rosy; styles 0.6-1.2 mm Spergularia macrotheca var. macrotheca
1 Petals white; styles 1.2-3 mm > 2
2 Capsules 1.2-1.4 times as long as sepals; styles 1.2-1.9 mm Spergularia macrotheca var. leucantha
2 Capsules 0.8-1 times as long as sepals; styles 2-3 mm Spergularia macrotheca var. longistyla
... more about "Spergularia macrotheca"
Ronald L. Hartman +  and Richard K. Rabeler +
(Hornemann ex Chamisso & Schlechtendal) Heynhold +
Arenaria macrotheca +
 Sticky sand-spurrey +
B.C. +, Calif. +, Oreg. +, Wash. +  and including nw Mexico. +
Alph. Aufz. Gew. +
Delia +  and Lepigonum +
Spergularia macrotheca +
Spergularia +
species +