hort.net Seasonal photo, (c) 2006 Christopher P. Lindsey, All Rights Reserved: do not copy
articles | gallery of plants | blog | tech blog | plant profiles | patents | mailing lists | top stories | links | shorturl service | tom clothier's archive0
Gallery of Plants
Tech Blog
Plant Profiles
Mailing Lists
    Search ALL lists
    Search help
    Subscription info
Top Stories
sHORTurl service
Tom Clothier's Archive
 Top Stories
Disease could hit Britain's trees hard

Ten of the best snowdrop cultivars

Plant protein database helps identify plant gene functions

Dendroclimatologists record history through trees

Potato beetle could be thwarted through gene manipulation

Hawaii expands coffee farm quarantine

Study explains flower petal loss

Unauthorized use of a plant doesn't invalidate it's patent

RSS story archive

Re:PHOTO:TB: Louisa's Song (Blyth 99)

  • Subject: [iris-photos] Re:PHOTO:TB: Louisa's Song (Blyth 99)
  • From: "Neil A Mogensen" <neilm@charter.net>
  • Date: Thu, 9 Dec 2004 12:56:22 -0500

Adam, the "Umbrata" concept is still fluid.  Fred Kerr prefers to call this phenomenon a "Corona" which is rather appealing.
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 SONG .
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 "shadow".
The photo is beautiful--and thank you for posting it!
Neil Mogensen  z 7 western NC mountains.

Yahoo! Groups Sponsor
click here
Web Bug from http://us.adserver.yahoo.com/l?M=295196.4901138.6071305.3001176/D=groups/S=:HM/A=2128215/rand=299199728

Yahoo! Groups Links

Other Mailing lists | Author Index | Date Index | Subject Index | Thread Index

 © 1995-2015 Mallorn Computing, Inc.All Rights Reserved.
Our Privacy Statement