Cardionema

de Candolle in A. P. de Candolle and A. L. P. P. de Candolle
in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 3: 372. 1828.
Common names: Sandcarpet
Etymology: Greek kardio, heart, and nema, thread, alluding to the obcordate anthers and slender filaments
Treatment appears in FNA Volume 5. Treatment on page 45. Mentioned on page 5.

Herbs, perennial. Taproots often stout. Stems prostrate, much-branched proximally, terete to angular. Leaves opposite, not connate, connected by thickened margins from which stipules arise, sessile; stipules 2 per node, silvery, lanceolate to ovate, margins entire to irregularly fimbriate, apex 2-lobed; blade prominently 1-veined, needlelike, not succulent, apex spinose. Inflorescences axillary, 1–3-flowered clusters; bracts paired, resembling stipules, smaller. Flowers sessile; hypanthium cup-shaped, not abruptly expanded distally; sepals 5, distinct, olive-green, oblong to obovate, 1.2–2.8 mm (excluding awns), indurate, herbaceous, margins whitish, scarious, apex spinose, prominently hooded, awned, hoods projecting inward and enclosing developing fruit, awns arising from near apex, widely divergent, very stout, spinose, 3 awns and associated sepals well developed, alternating with 2 reduced sepals; nectaries not apparent; stamens 3–5; filaments distinct to base; staminodes 5, adnate basally with alternating filaments, ovate-triangular, apex acuminate; styles 2, distinct, subcapitate, 0.2 mm, glabrous proximally; stigmas 2, subterminal, obscurely papillate (50×). Utricles ellipsoid to cylindric, teeth absent, indehiscent. Seeds tan with red spot at hilum, narrowly ovate, not compressed, smooth, marginal wing absent, appendage absent; embryo peripheral, straight to slightly curved.

Distribution

Coastal w North America, South America (Chile, Ecuador, Peru).

Discussion

Species 6 (1 in the flora).

Selected References

None.

... more about "Cardionema"
Ronald L. Hartman +
de Candolle in A. P. de Candolle and A. L. P. P. de Candolle +
Sandcarpet +
Coastal w North America +, South America (Chile +, Ecuador +  and Peru). +
Greek kardio, heart, and nema, thread, alluding to the obcordate anthers and slender filaments +
in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. +
Cardionema +
Caryophyllaceae subfam. Paronychioideae +