sores on the leaves of Arum maculatum

From: "Peter Boyce" <P.Boyce at lion.rbgkew.org.uk> on 1997.12.03 at 16:58:15(1695) James The 'sores' on the leaves of A. maculatum in the book are true to life, they really are both sunken and raised like black blisters. This occurrence (bullate leaves) is also found in Biarum pyrami and B. bovei where black-spotted leaves occur, also in Eminium koenenianum where the 'sores' are white. Odder still, in some forms of B. pyrami the 'sores' are plain green like the remainder of the leaf. Pete +More ---------------------------- Peter Boyce Herbarium Royal Botanic Gardens, Kew Richmond Surrey TW9 3AE U.K. Tel. + 44 - (0)181 332 5207 Fax. + 44 - (0)181 332 5298 email. p.boyce@lion.rbgkew.org.uk

From: "James W. Waddick" <jim-jim at swbell.net> on 1997.12.03 at 20:01:46(1698) >James > >The 'sores' on the leaves of A. maculatum in the book are true to >life, they really are both sunken and raised like black blisters. >This occurrence (bullate leaves) is also found in Biarum pyrami and >B. bovei where black-spotted leaves occur, also in Eminium >koenenianum where the 'sores' are white. Odder still, in some forms >of B. pyrami the 'sores' are plain green like the remainder of the >leaf. +More > >Pete Dear Pete; Without a leaf to look at right now-although they are unrolling out of the ground, I don't really recall seeing these raised and sunken areas, just a smooth leaf with numerous small dark brown spots of color. Did I just not notice the change in surface texture here? Very odd, but gives me more to look for when they emerge fully. The flowers do correspond exactly with the one illustrated and your description in your book. I recall keying it out when I got your book. I never quite trust some names until I get an authority for comparison and verification. Many thanks and I'll try to remember and report back. Thanks Jim W. James W. Waddick Voice: 816 746 1949 8871 NW Brostrom Rd E-MAIL: jim-jim@swbell.net Kansas City MO 64152 Fax: 816 746 1939 Zone 5/6 - Winter low -10 degrees F Summer high +100 degrees F

From: "Peter Boyce" <P.Boyce at lion.rbgkew.org.uk> on 1997.12.11 at 14:03:43(1729) Dear James The character of the raised and sunken spots on the leaves of Arum maculatum is, like almost everything else about the species, variable. Most of the spotted plants will have the spots flush with the leaf surface, whereas a few will have them as the 'sores' depicted in the Arum plate. Happy observing Pete +More ---------------------------- Peter Boyce Herbarium Royal Botanic Gardens, Kew Richmond Surrey TW9 3AE U.K. Tel. + 44 - (0)181 332 5207 Fax. + 44 - (0)181 332 5298 email. p.boyce@lion.rbgkew.org.uk

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