A saxicolous, pulvinate species, often branched, with stout brown roots. Flowering height is 10 to 15 cm, with a caulescent stem longer than the rosette, up to 13 cm long. The rosette is up to 7 cm in diameter with 12 to 14 polystichous leaves, 3 to 7 cm long. Leaves are coriaceous to sub-succulent with an asymmetric keel, green-grey, covered with appressed cinereous scales. Named after Australian bromeliad enthusiast Len Colgan. Related to T. friesii and T. hegeri but distinguished by stem length, inflorescence structure, and violet petals.
Tillandsia属（エアプランツ）は土を必要としない着生植物です。葉から水分を吸収するため、独特の管理方法が必要です。
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