Fig. 2

Griffithsia capitata. a Habit of male gametophyte. b Basal disc. c Dome-shaped apical cell terminating vegetative branch. d Globose tetrasporangia in whorls encircling distal ends of subapical to median cells. e Tetrasporangia with loss of upper part. f Spermatangial cap developing on ultimate cell of a fertile branch. g Persistent kidney-shaped involucral cells which surrounded the carposporophyte (which has shed). Scale bars: a, 1 mm; b, 200 μm; c, 250 μm; d, 100 μm; e, 50 μm; f, 250 μm; g, 50 μm