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  Anth. tilarenense
From: Neil Carroll <zzamia at hargray.com> on 1999.03.01 at 02:24:42(3082)
Aroiders, I have mulled over this for quite sometime now. I have a problem
with the sectional placement of Anthurium tilarenense. As some know, A.
tilarenense is now placed in sec. Samaeophyllium based on its tri-lobed,
entire leaves. I grow several plants in sec. Samaeophllyium among them are
A. falcatum, A. impolitum,A. madisonianum, A. garagaranum, A. trilobum, and
A. grex-avium. The ONLY characteristic I can find that places this plant in
sec. samaophyllium is the tri-lobed leaf. Everything else about this plant
tells me it belongs in Sec. Calomystrium and the only characteristic that
would exclude it this section.

What brought my attention to this was the intact, persistant catyphylls.On
none of the above mentioned species in my collection nor in any of the
literature that I have are persistant catyphylls found or mentioned. I also
grow about 25 or more species of sec. Calomystrium so I have living
material on hand to make comparisons.

Some characters that I observe in A. tilaranense that I think should place
it in sec. Calomystrium:

Leaves. The general texture of the lamina is closer to the texture of my
calys than my samaeos
Short raphide cells are visable on the upper surface of the blade
( I think! I might need a lesson on this)

Inflor. The spath and spadix seem to be closer to calys than to samaeos in
color (white to pale green)and shape and texture
I have made a cross polination between A. tilarenense and A.
veitchii. berries are forming now but will not know if they hybridized or
not, any way the pollination has initiated something. A. veitchii
s infloresence will just die if not pollinated.

I remember having a problem with the placement of A. amnicola and A.
antioquense in sec. Porphyrochitonium because of their persistent intact
catyphylls and now I see they have been moved to sec. calomystrium. Are
persistant intact catyphylls found on any other species in any other
section than Calomystrium? Are persistant catyphylls a conservative character?

I am admittadly an armchair guy on this and I would like to have more
literature and maybe a microscope to look at some of these characters more
closely (ie raphide cells, flower structure)

I noticed that chromosome counts for these two sec. overlap having
being common to both sections.

I know D. Mansell is working on this with Tom C. wonder what kind of
problems this species might be creating for the section.

I also know my theory would mess up the keys.

Any thoughts??

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