Rhizome Morphology and Patterns of Leaf Production of Secondary Hemiepiphytic Oleandra pistillaris (Oleandraceae)

摘要

Secondary hemiepiphytic Oleandra pistillaris and Nephrolepis are characterized by rhizome dimorphism; the rhizomes are erect and creeping (stolon). The erect rhizome produces leaves in apparent whorls at subequal internodes, but the creeping rhizome of O. pistillaris is dor-siventral with variously long internodes, and the creeping stolon of N. cordifolia grows without any leaves. It is in contrast to the general monomorphic rhizome with regular phyllotaxy in other life forms of related ferns.