[1]
Simpson, M.G., Mabry, M.E. and Hasenstab-Lehman, K. 2019.

Transfer of four species of Cryptantha to the genus Johnstonella (Boraginaceae)

. Phytotaxa. 425, 5 (Dec. 2019), 279–289. DOI:https://doi.org/10.11646/phytotaxa.425.5.3.