(no subject)

Jan Schlauer (zxmsl01@studserv.zdv.uni-tuebingen.de)
Wed, 22 Dec 1993 20:15:19 +0100

Barry, you wrote:

>Now I see my _P.agnata_ is going to flower. I was looking at this plant
>and noticed something interesting. There are glandular hairs not only on
>the adaxial (top) surface of the leaves, but also on the abaxial (bottom)
>surfaces. Not just hairs, but *glandular* hairs---I touched them and saw
>little strands of goo as I pulled my finger away. In the September CPN
>(not the newest one that I haven't gotten yet) some blokes make a big stink
>about some Mexican _Ping_ they discovered that has abaxial glands. I thought
>this was pretty neat at the time, but now I am not sure it's such a new
>thing. Jan, is there much about _Ping_ indumentum in the literature?

Apart from the CPN note you cited, I don't know anything from literature,
but I do know (from personal communication or my own observations) that at
least _P.agnata_ (incl. _P.spec._ "Ayautla"), _P.jaumavensis_ (which is
very closely related to _P.esseriana_), and _P.vallisneriifolia_ have
glandular hairs on the abaxial leaf surface, sometimes (it may depend on
the clone and on maturity).

> Is
>abaxial glandularity considered a rare thing? I know you lump large numbers
>of Mexican _Pings_ into _P.moranensis_ and _P.agnata_---is this a trait
>common in _P.agnata_?

I don't know how common this is in _P.agnata_ (I just do not yet know the
whole range of variability in this rather complex species sufficiently),
but it seems to occur in clones from different populations.

Kind regards
Jan
*<:-D