Aqua-Planta 16(1): 1-33, 1991
The narrow leaved
Cryptocoryne
of Mainland Asia
Niels Jacobsen
Jacobsens milestone 1991 paper revising his 1980 paper about the albida complex (
albida
,
crispulata
and
retrospiralis
). All other strap leaved forms (except APO) are placed as varieties of crispulata.