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heterosporous
heterosporous adj. 
/ˌhɛdəroʊˈspɔrəs/, /ˌhɛdərəˈspɔrəs/ [Greek σπόρος seed] Botany producing two different kinds of spores; opposed to homosporous or isosporous.
Brit. /ˌhɛtəˈrɒspərəs/
, /ˌhɛtəˈrɒspərəs/U.S. /ˌhɛdəˈrɑspərəs/
, /ˌhɛdəˈrɑspərəs//ˌhɛdəroʊˈspɔrəs//ˌhɛdərəˈspɔrəs/ΘΚΠ
the world > plants > part of plant > reproductive part(s) > spore or sporule > [adjective] > having one kind or different kinds of spores
heterosporous1875
isosporous1875
homosporous1887
heterosporic1895
1875 A. W. Bennett & W. T. T. Dyer tr. J. von Sachs Text-bk. Bot. 805 In Phanerogams the embryo-sac corresponds to the large, the pollen-grain to the small spore of heterosporous Vascular Cryptograms.
1881 Nature 15 Sept. 474/1 [Prof. Williamson] divides coals into ‘Iso-sporous’ and ‘Heterosporous’ coals.
1881 Nature 15 Sept. 607 They further consider that some of his Calamariæ..were heterosporous.
1886 Athenæum 10 Apr. 491/2 Mr. Bennett has made use of the term Megasporangia in describing the heterosporous vascular cryptogams.
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