Anatomy, pollen, and chromosomes of Adenoa (Turneraceae),

GONZALEZ, A. C.R. SALGADO, A. FERNÁNDEZ Y M.M. ARBO

BRITTONIA

SPRINGER

Lugar: Berlin; Año: 2011 vol. 64 p. 208 - 225

0007-196X

Abstract. The monotypic genus Adenoa is endemic to Cuba. Its name alludes to thepresence of minute glands on the petal margin, identified in the present study aslachrymiform colleters. Here we describe the morphological, anatomical, palynolog-ical, and chromosome features that characterize Adenoa cubensis. The indumentum ofAdenoa consists only of stellate trichomes. Unlike many species of the new worldgenera Piriqueta and Turnera, Adenoa lacks glandular hairs and extrafloral nectaries.Adenoa, Piriqueta, and Turnera share the presence of standard, sessile, and lachrymi-form colleters. The leaves of Adenoa have xeromorphic features, which include entire,revolute blade margins, an adaxial hypodermis, and stomata restricted to the abaxialsurface. The chromosome number is 2n=14, which is probably the ancestral numberof the family. Adenoa chromosomes are similar in size to those of Turnera, and arelarger than those of Piriqueta. Using the available data, we discuss relationshipsamong the new world genera of Turneraceae.