Smith GF. The taxonomy and nomenclature of Kalanchoe ser. Rotundifoliae, a cluster of small-growing to medium-sized species with narrowly urceolate flowers here included in K. sect. Kalanchoe (Crassulaceae [subfam. Cotyledonoideae] tr. Kalanchoeae), with the description of a new series, K. ser. Hirtae. Phytotaxa [Internet]. 2026 May 8 [cited 2026 May 11];755(2):175-94. Available from: https://phytotaxa.mapress.com/pt/article/view/phytotaxa.755.2.3