Physostegia correllii (Correll's Obedient Plant)
Zone: 6a to 9b,guessing
Height: 84" tall
Origin: United States
Pot Size: 3.5" pot (24 fl. oz/0.7 L)
This very rare (special concern) North American native perennial is found only in a small area in southeast Texas and adjacent Louisiana. I will admit it's hard to imagine how an obedient plant could become endangered, but this is evidently the case. This giant species forms large colonies by way of a short, thick rhizome. The crown of Physostegia correllii gives rise to massive 7' tall, 1" thick stems, topped in early July with 12-way branched flower clusters. Each flower is a mauvy pink (RHS 77B), highlighted by dark purple speckles...quite a sight!