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leptosporangiate

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leptosporangiate [ˌlɛptəʊspəˈrændʒɪɪt]
adj
(Life Sciences & Allied Applications / Botany) (of ferns) having each sporangium developing from a single cell, rather than from a group, and normally with specialized explosive spore dispersal Compare eusporangiate
ThesaurusLegend:  Synonyms Related Words Antonyms
Adj.1.leptosporangiate - (of ferns) having each sporangium formed from a single epidermal cell; "leptosporangiate ferns"
eusporangiate - (of ferns) having sporangia that arise from a group of epidermal cells; "eusporangiate ferns of the families Ophioglossaceae and Marattiaceae"


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The surprising results suggest that polypod ferns--a group within leptosporangiates that includes more than 80 percent of living fern species--experienced an explosion of diversification between 20 million and 50 million years after the angiosperms appeared on the botanical scene.
 
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