Calandrinia acaulis Kunth

Oreobroma mexicanum Rydberg, sp. nov
Perennial, with thick fleshy taproot often 1 dm. long, 5-15 mm. thick; leaves numerous, all basal, linear, 2-7 cm. long, 2-3 mm. wide, fleshy; flowers numerous, mostly solitary on basal peduncles; peduncles 5-20 mm. long; bracts linear, 1.5-2.5 cm. long; sepals ellipticlanceolate, 6-7 mm. long; petals 5 or 6, spatulate, clawless, white, about 1 cm. long; stamens of about the same number, the anthers oblong, 2 mm. long; style about 3.5 mm. long; stigmas 3 ; fruit rounded-ellipsoid, 7 mm. long, the pericarp very thin, circumscissile at the base, and slightly splitting from the base; seeds numerous, black, nearly 1.5 mm. long and 1 mm. wide.
Folia linearia succulentia; inilorescentia plerumque nniflora pedunculis basilaribus numerosis; bracteae et sepala non glanduloso-dentata; petala spathulata alba; semina nigra.
Type collected on Mount Orizaba, July 25-26. 1901, Rose &■ Hay 5769 (U. S. Nat. Herb. 395556). Distribution: High mountains above 10,000 meters, Orizaba, Popocatepetl, Ixtaccihuatl, and Nevada Toluca.