Hortus Third was published in 1976 so a Hortus Fourth or supplement to
Hortus Third is well overdue
I have been given to understand that Cornell has no plans for a Hortus Fourth.
It would be just too massive an undertaking. From now on, horticulturists will
have to rely on monographs of the various families and groups, such as Maples
of the World, etc. It is unfortunate because many nurserymen stubbornly attach
Hortus Third obsolete names to their stock and you can't convince them it's
incorrect.


Iris,
Central NY, Zone 5a, Sunset Zone 40
"The trouble with people is not that they don't know but that they know so much
that ain't so."
Josh Billings (Henry Wheeler Shaw), 1818-1885