American Journal of Botany, Vol. 35, No. 6 (Jun., 1948), pp. 343-349 (7 pages) The female gametophytes of Hesperocallis undulata Gray and Leucocrinum montanum Nutt. follow the normal type of ...

1. The cyathium of both species studied begins as a papilla which arises between two bracts. The order of appearance of the parts of the cyathium is as follows: staminate flowers, involucre, ovules, ...

A gradient (red) in the concentration of the plant hormone auxin determines that only one of the eight nuclei in a plant's embryo sac will become an egg. (The blue island in the image is a cell ...

MEMBERS of the family Loranthaceæ are characterized by many abnormal features in the development and organisation of the embryo sac, endosperm and embryo 1,2,3. In June 1949, one of us (P. M.) ...

Scientists have discovered that a plant hormone called auxin is responsible for development of the egg cell in a plant's embryo sac. In unraveling this fundamental issue in plant biology, the work ...