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Primary and secondary thickening in the stem of Cordyline fruticosa (Agavaceae)
(Academia Brasileira de Ciências, 2010)
The growth in thickness of monocotyledon stems can be either primary, or primary and secondary. Most of the authors consider this thickening as a result of the PTM (Primary Thickening Meristem) and the STM (Secondary ...
Leaf anatomy with emphasis on separation of two species of Varronia P.Br. (Cordiaceae) of the Brazilian semi-arid region
(Soc Botanica Sao PauloSao PauloBrasil, 2013)