I have difficulty to acertain the species, but apparently most taxa are synonyms or closely related or have a very restricted distribution leaving B. phalloides and B. stevenii as the only reliable and most likely options. Between the two, I am opting for B. stevenii (originally a var. of B. phalloides) for being longer, and its habitat less specific to sand. The specimen was found in an embellishment with casuarina leaf litter in a sand-rich soil.