Ken Druse's suggested plant combinations for a Southwest garden include this lineup that delivers winter blooms. The palette includes, clockwise starting with the long, horizontal serrated leaf: the blade-like foliage of Agave americana (specifically, a cultivar called Variegata); the leafy green foliage of Citrofortunella mitis (the cultivar Variegata); the chartreuse flowers of Euphorbia rigida; an orange-tinged aloe called Blue Elf; Lachenalia aloides, with yellow bell-shaped flowers; the spiked cactus Opuntia engelmannii; the pink-flowered Bryophyllum daigremontianum; and the yellow-flowered Cassia didymobotrya.