FIGURE 3 in A new subfamily Calasterelloideae and new genus Calasterella for a phylogenetically and morphologically distinct member of the Aytoniaceae

FIGURE 3. Calasterella californica (Hampe ex Austin) D.G.Long & T.X.Zheng. A: Immature carpocephalum from below showing deeply cleft involucres with overlapping margins of cleft. B: Mature carpocephalum from below showing pseudoperianths and dehisced sporophyte with lemon-yellow spores. C: Scanning Electron Micrographs of the spores, distal face. D: Scanning Electron Micrographs of the spores, proximal face. Arrow heads: involucre. Arrow: spores. Scale bars: A, 2 mm; B, 1 mm; C, D: 20 μm. [A: D.G. Long 45940 (E). B: D.G. Long 45333 (E). C, D: D. G. Long et al. 44666 (E)]