Crane, C.F. 2019. Megagametophyte Differentiation in Zephyranthes drummondii D. Don and Zephyranthes chlorosolen (Herb.) D. Dietr. (Amaryllidaceae). Caryologia. 72, 4 (Dec. 2019), 105–119. DOI:https://doi.org/10.13128/caryologia-670.