Adam, the "Umbrata" concept is still fluid.
Fred Kerr prefers to call this phenomenon a "Corona" which is rather
As I understand "Umbrata", it refers to the fall
surface overlay of dark color (and texture, probably), which usually
leaves a relatively narrow band of the underlying color showing--as in LOUISA'S
The band can be absent, extremely narrow (as in
ROMANTIC EVENING) or very wide. In some expressions it either interacts
with a separate factor or is expressed with an allelic variant so that the
part of the pattern near the beard is expressed with heavy lines in the veins
radiating out into the fall, the spaces between being white or
some light carotenoid color--yellow, orange or pink.
Some seedlings from HAPPENSTANCE crossed with a
clean full Umbrata sort produced some yellow seedlings with a scruffy looking
flush of color radiating outward from the beard. I believe this is due
to part of the Umbrata allelic series as nothing else was present to
account for the pattern.
The band as the defining characteristic was part of
Linda Mann's original suggestion proposing the term. The problem
with the band, however, is what it is NOT, not what it is.
And interesting example is MASTERY. The fall
band is a different color from the standards. The
variety appears to be a dominant amoena I(s) as well as having an Umbrata
overlay. If the band defined the concept, one would expect the band to
match the standards being white, yellow, pink or orange in color.
The word itself is from the Latin root for
The photo is beautiful--and thank you for posting
Neil Mogensen z 7 western NC
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