THE DEVELOPMENT OF THE TRANSMITTING TRACT IN THE PISTIL OF HACQUETIA-EPIPACTIS (APIACEAE)

Hacquetia epipactis has a wet, nonpapillate stigma. Stigmatic cells ar e moribund at maturity and become disrupted because of accumulated and ascending stylar secretion. The stigmatic surface coating is produced completely by the stylar transmitting tissue. The style is a half-sol id type, with large secretion-filled schizogenous channels. The secret ion mainly contains polysaccharides mixed with a small amount of lipid s. Pollen grains germinate within the stigmatic secretion and the poll en tubes grow directly into the stylar channels.