15b. Claytonia perfoliata Donn ex Willdenow subsp. mexicana (Rydberg) John M. Miller & K. L. Chambers, Novon. 3: 269. 1993.
Madrean miner’s-lettuce
Limnia mexicana Rydberg in N. L. Britton et al., N. Amer. Fl. 21: 309. 1932
Leaves: blades usually green, epidermal gas pockets usually absent; basal leaf rosettes suberect to flattened, 2-30 cm, blade deltate, apex apiculate drip tip, mucro 1-2 mm; cauline leaves perfoliate, blade 1-10 cm diam., margins notched or deeply cleft, apex often with twin apiculate, curved tips. Seeds 2-3 mm. 2n = 12, 24, 60.
Flowering Feb-Apr. Rockslides, landslides, along animal trails; 0-2000 m; Ariz., Calif., N.Mex.; Mexico; Central America (Guatemala).
In the Channel Islands and Arizona, flowering apparently follows spring rains.