The gynostemium of Bulbophyllum ecornutum (J. J. Smith) J. J. Smith (Orchidaceae)

RASMUSSEN, F. N., 1985. The gynostemium of Bulbophyllum ecornutum (J. J. Smith) J.J. Smith (Orchidaceae) . Stages in the development of the gynostemium of Bulbophyllum ecornutum demonstrate that the pollinium stalk is a hamulus in this and in a closely related species, B. gibbolabium . A hamulus arises by apical growth and reflexion of the median carpel. Hamuli have recently been discovered in several orchid genera, and a transverse fold of the rostellar apex is already known from a large group of orchids. The closely related B. cornutum has a quite different gynostemium structure.     

Obituary: J.D. Bu'Lock (1928–1996)

Obituary: J.D. Bu'Lock (1928–1996)     

V(D)J recombination: on the cutting edge.

The vertebrate immune system has evolved an elegant mechanism for generating an enormous diversity in antigen receptor binding specificity from a limited amount of genetic information. Recent advances are rapidly increasing our understanding of this unusual site-specific DNA rearrangement that assembles the antigen receptor genes during lymphoid development.     

Finding of the Carposporophyte of Pleuroblepharidella japonica (Okamura) M.J. Wynne (Rhodophyta: Bonnemaisoniaceae)

Russian Journal of Marine Biology - The female fertile samples of the red alga Pleuroblepharidella japonica (Okamura) M.J. Wynne from coastal waters of Matua Islet (Kurile Islands) have been found...