S1

Critically Imperiled 

Rare and Threatened Plants of Big Bend at www.nbii.gov/portal/server.pt (2009)

Hexalectris revoluta (Curly Crested Coralroot)

Herbaceous saprophytic perennial; stems 40-50 cm tall, pale pink to rose to tan, leafless except for a few widely spaced bracts; inflorescence a raceme with 10-20 rose-tan to whitish flowers; sepals and petals pale rose-tan with light veining, free a...