|Publication Type:||Journal Article|
|Year of Publication:||2001|
|Authors:||B. D. Sharma, Purohit S. N.|
|Journal:||Phytomorphology: An International Journal of Plant Morphology|
|Pagination:||57 - 61|
|Keywords:||Common ancestor, Ferns, Lycopods|
Comparison is made between the unique structure labium/velum of Isoetes and the indusium of ferns. All three structures are derived from a common ancestor. The hypothesis is based on the study of labium and velum in three Indian species of Isoetes.