pleuroplastic

from The Century Dictionary.

• In plant physiol., developing tissue, by a stretching of the meristem, all along the primordium at once: said of a type of leaves. Correlated with basiplastic, that is, developing tissue at the apex first and thence to the base; and eucladous, forming lobations in the embryonal tissue before the meristem has begun to stretch, which does not happen in the other cases.