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Urs, H. G. V. G. and Nagendran, C. R. (1996) Studies on the development of gametophytes and endosperm in Jamesbrittenia microphylla (Scrophulariaceae) with reference to its systematic position. South African Journal of Botany, 62 (2). pp. 99-103.
Nagendran, C. R. and Anand, V. V. and Arekal, G. D. (1980) The embryo sac of Podostemum subulatus (Podostemaceae) - a reinvestigation. Plant Systematics and Evolution, 134 (1-2). pp. 121-125. ISSN 0378-2697