User:Eri0n0ire/Sedum spathulifolium

Taxonomy
Sedum spathulifolium is a widespread stonecrop species exhibiting highly variable morphologies throughout its distribution range. While some early literature such as Clausen and Uhl (1944) recognized three subspecies, more recent literature and databases such as Flora of North America such as Plants of the World Online recognized only two varieties.

Clausen and Uhl (1944): Foliage often present on both the flowering branch and the basal rosette, typically heavily pruinose (covered by a layer of white, waxy powder) and are thicker (0.2-0.3 cm). Foliage often restricted to the basal rosette part, typically green or glaucous (not pruinose) and are thinner (1.4-2.1mm). Flower larger than that of subsp. anomalum (0.8-1.7 cm in diameter). Foliage often restricted to the basal rosette part and devoid of white, waxy, powdery covering; margin slightly wavy. Flowers smaller than that of subsp. typicum (0.7-1.1 cm in diameter).
 * Sedum spathulifolium Hooker subsp. pruinosum (Britton) Clausen et Uhl
 * Sedum spathulifolium Hooker subsp. typicum
 * Sedum spathulifolium Hooker subsp. anomalum (Britton) Clausen et Uhl

Flora of America: Primary rosette narrower in diameter (1.5-2.1cm). Foliage typically covered by a thick layer of white powdery waxy overcast and are thicker (2.1-2.5mm). Flowers slightly larger in diameter (1-1.2cm) Primary rosette wider in diameter (2.5-3.7cm). Foliage typically green or glaucous (do not have a thick white powdery waxy powdery covering) and are thinner (1.4-2.1mm). Flowers slightly larger in diameter (1.2-1.6cm).
 * Sedum spathulifolium Hooker var. pruinosum (Britton) B.Bolivin
 * Sedum spathulifolium Hooker var. spathulifolium