Encyclopedia Americana, Volume 8Americana Corporation, 1965 - Encyclopedias and dictionaries |
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Page 353
CYCADALES CYCADALES. 353 giate microsporangia are grouped radially in sori reminiscent of ferns . Each sorus contains 5 , 4 , 3 , or 2 ( even 1 ) microsporangia . Pollen cones vary in size from 3/4 inch to 35 inches ( 8 inches in diam ...
CYCADALES CYCADALES. 353 giate microsporangia are grouped radially in sori reminiscent of ferns . Each sorus contains 5 , 4 , 3 , or 2 ( even 1 ) microsporangia . Pollen cones vary in size from 3/4 inch to 35 inches ( 8 inches in diam ...
Page 357
CYCADALES CYCADS - CYCLING CYCLOID CYCLOPLEGICS - CYGNUS CYME CYNEWULF —. other groups , mostly to the cycadlike ... Cycadales are typically cycadaceous in structure , we may postulate that they arose dur- ing late Paleozoic times from ...
CYCADALES CYCADS - CYCLING CYCLOID CYCLOPLEGICS - CYGNUS CYME CYNEWULF —. other groups , mostly to the cycadlike ... Cycadales are typically cycadaceous in structure , we may postulate that they arose dur- ing late Paleozoic times from ...
Page 358
... Cycadales are the pinnate types Nilssonia , associated with An- drostrobus and Beania cones ( Jurassic ) , Ctenis , Pseudoctenis ( including Pseudopterophyllum ) , Doratophyllum , and the giant , long obovate , en- tire ...
... Cycadales are the pinnate types Nilssonia , associated with An- drostrobus and Beania cones ( Jurassic ) , Ctenis , Pseudoctenis ( including Pseudopterophyllum ) , Doratophyllum , and the giant , long obovate , en- tire ...
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