%0 Journal Article %T Early Leaf Development and Leaf Sheath Formation of Botrychium strictum and B. virginianum (Ophioglossaceae) %A IMAICHI,, RYOKO %J Annals of Botany %V 63 %N 2 %P 249-256 %@ 0305-7364 %D 1989-02-01 %I Oxford University Press %~ DeepDyve