Links to databases :

Tubular leaf

Formal name:  leaf tubular
Local identifier:  TOP238
Definition:  the leaf (PO:leaf)is simple (PO:simple leaf, TOP:simple leaf), unifacial (having just one surface) and tuberous, usually hollow inside.
Formal Unit:  unitless (category)

Reference:  Klotz, S., Kühn, I. & Durka, W. (2002): BIOLFLOR - Eine Datenbank zu biologisch-oekologischen Merkmalen der Gefaesspflanzen in Deutschland. - Schriftenreihe fuer Vegetationskunde 38. Bonn: Bundesamt fuer Naturschutz.


------------------------------------------------