I have taken another closer look at Marcus Nadruz's photos of Philodendron lanceolatum, and this also looks different to me from Philodendron crassinervium. I am only relying on those small photos, so these may be artifacts of the photograph quality, but this is what I notice. First of all, the inflorescence is not hooded or cucullate, as the original description mentions. The color of the inflorescence differs, although, how taxonomically significant this is, varies. Second, it appears that the primary lateral veins of the Philodendron lanceolatum are prominent. Thirdly, and this is the difficult thing to confirm from a small image, is the petioles appear to be adaxially sulcate, with a sharp edge...this would make the petiole "C" shaped. I could be wrong, but,
this is what I am seeing. If I am correct, perhaps Philodendron lanceolatum may be resurrected from synonymy from Philodendron crassinervium. Remember, I do not have any specimens to directly observe, so some of these details may be optical illusions.
--- On Tue, 8/18/09, Tom Croat <Thomas.Croat@mobot.org>
From: Tom Croat <Thomas.Croat@mobot.org>
Subject: Re: [Aroid-l] Philodendron crassinervium inflorescence
To: "Discussion of aroids" <email@example.com>
Date: Tuesday, August 18, 2009, 6:23 PM
Schotts drawing is of P. crassinervium.
Yes thing have gone extinct after having been described.
Behalf Of Harry Luther
Sent: Tuesday, August 18, 2009
To: Discussion of aroids
Subject: Re: [Aroid-l]
Philodendron crassinervium inflorescence
I collected P. crassinervium in 1996
between Mangaritba and Angra dos Reis, R de J,
Brazil in lowland more or less
undisturbed (rare!) Atlantic
Forest . I do not believe
that it and the P. alternans that I received from Leland are
firstname.lastname@example.org [mailto:email@example.com]On Behalf Of ExoticRainforest
Sent: Saturday, August 15, 2009
To: Discussion of aroids
Subject: [Aroid-l] Philodendron
Tom, thanks so much for the plate. I've added it to
I find it interesting Schott's plate does not appear to match your field notes
on P. crassinervium or Mauro
Peixoto's photo. I have three questions. Is Scott's drawing
applicable to P. alternans or P. lanceolatum? And more
important in my mind, could Schott have described something that no longer
exists in the forests of Brazil? Or, is it possible P. alternans is truly a species since it
is more often epiphytic as well as pendent while P. crassinervium is primarily terrestrial? The plants
in my own collection appear to be different and Eduardo and Marcus have both
said privately they are not likely to be the same plant species. In
addition, notes and photos I've added to the page from Leland Miyano also at
least appear to indicate they may not be the same plant.
Input from any of our experts would be most helpful. And by the way, I've
copied this privately to all mentioned in this note so if any of you choose to
comment please include Aroid l when you respond.
Thanks as always!
Tom Croat wrote:
Dear Steve: We could scan
Schott’s painting of the inflorescences if you would like it.
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