Unusual meristematic and developmental features of Cladopus roots
Roots of plants of the Podostemaceae, such as Cladopus, typically adhere to rocks in riparian environments and exhibit considerable morphological diversity. Koi and Kato (pp. 927-937) show that the broad ribbon-like roots have an apical meristem and, additionally, a long marginal meristem characteristic of a foliose root. In contrast to endogenous branching in other angiosperms, Cladopus lateral roots originate both endogenously and exogenously.
