Herbs, annual, not rhizomatous or stoloniferous. Stems prostrate to erect, branched; nodes glabrous. Leaves alternate, not articulate at base, somewhat to markedly clasping, attachment points linear; blade linear to oblanceolate, or ovate to spatulate, flattened, glabrous or with elongate unicellular hairs. Inflorescences racemose, somewhat to markedly secund (at least distally), elongate, bracteate; bracts leaflike. Flowers pedicellate; sepals persistent in fruit, imbricate, green, distinctly angled or keeled, ovate, herbaceous, glabrous or with elongate, unicellular hairs; petals usually 5, red; stamens 3-15, usually opposite petals, not adnate to petals; ovules 6-many; style present; stigmas 3. Capsules 3-valved, longitudinally dehiscent from apex, valves not deciduous, reflexed after dehiscence, margins markedly involute; endocarp and exocarp not separating. Seeds 10-20, black, ± ellipsoid, reticulate or tuberculate viewed at 30×, glabrous, estrophiolate. x = 12.
Ford, D. I. 1992. Systematics and Evolution of Montiopsis Subgenus Montiopsis (Portulacaceae). Ph.D. thesis. Washington University. Hershkovitz, M. A. 1993. Revised circumscriptions and subgeneric taxonomies of Calandrinia and Montiopsis with notes on phylogeny of the portulacaceous alliance. Ann. Missouri Bot. Gard. 80: 333-365. Hershkovitz, M. A. 1993b. Leaf morphology of Calandrinia and Montiopsis (Portulacaceae). Ann. Missouri Bot. Gard. 80: 366-396. Kelley, W. A. 1973. Pollen Morphology and Relationships in Calandrinia H. B. K. (Portulacaceae). M.S. thesis. California State University, Northridge.
|[For J. L. Calandrini, 1703-1758, Swiss botanist]|