
TY  - JOUR
A1  - Grootjen, CJ 
T1  - Development of ovule and seed in <I>Cartonema spicatum</I> R. Br. (Cartonemataceae)
JF  - Australian Journal of Botany
JO  - Aust. J. Bot.
Y1  - 1983
VL  - 31
IS  - 3
SP  - 297
EP  - 305
KW  - 
UR  - https://doi.org/10.1071/BT9830297 
N2  - In Cartonema spicatum the ovule is completely anatropous and has dermally initiated integuments. The seed coat is formed by the outermost layer of the inner integument and the silicified inner layer of the outer integument, the remaining layers of the last forming a loose cover around the testa. The seed has an operculum (also called embryostega) but no micropylar collar. In these respects Cartonema does not differ appreciably from Commelinaceae, so that the segregation of a separate family Cartonemataceae on seed characteristics alone is unwarranted. 
ER  -

