Blue Elf Aloe, stressed. These are one of the greatest succulents for container gardens. Practically impossible to kill (I've never seen one this stressed). Put some in a pot alone with room for more and watch them have massive amounts of baby plants for you. Will take full sun or afternoon sun, but prefers morning sun. When healthy, they're a gorgeous greenish-blue color and they have lovely orange flower spikes, too.
A. Felt bush (Kalanchoe beharensis) -- 1 B. Harpoon daisy (Senecio cuneatus) -- 1 C. Moonstones (Pachyphytum oviferum) -- 1 D. Black mondo grass (Ophiopogon planiscapus 'Nigrescens') -- 1 E. Silver dollar jade (Crassula arborescens) -- 1 F. Warty panda plant (Kalanchoe tomentosa) -- 1 G. Medicinal aloe (Aloe vera) -- 1