TY -JOUR
AU -H. G. V. G. Urs and Jayaraj M.
TI -Embryology of  Adenosma bilabiatum (Roxb.) Merr. (= A. capitatum Benth.) (Scrophulariaceae)
PY -1999
DA -0000-00-00
JO -Taiwania
VL -44
IS -3
SP -355
EP -367
UR -https://taiwania.ntu.edu.tw/abstract/143
AB -Anthers are tetrasporangiate. Anther wall development is of the dicotyledonous type. The glandular tapetum is single-layered and exhibits dual origin. Microspore tetrads are tetrahedral. Pollen grains at the time of anther dehiscence are two-celled and triaperturate. Ovules are unitegmic, tenuinucellar and anatropous. Development of female gametophyte conforms to the Polygonum type. Fertilization is porogamous. Endosperm is celluar with a single-celled chalazal haustorium, while the micropylar haustorium is initially four-celled, but becomes single-celled and quadrinucleate by the breakdown of the walls of the haustorial cells. Embryo development conforms to Onagrad type. Seed coat is thin with a prominent epidermal layer.
DO -10.6165/tai.1999.44(3).355