I don't have the answer (yet), but would note that the references I've 
seen to Mt. Alzapan all seem to be from 1925... you might need a 
historical map. Also, those references explicitly state Tayabas province.

> Nepenthes alzapan Jebb & Cheek, sp. nov. Type:—PHILIPPINES. Luzon, 
> “Tayabas Prov., Mt Alzapan”, male fl. 7 June 1925, Ramos & Edanõ 45690 
> (holotype K!; isotypes NY!, UC!, US!) (Fig. 1).

I'll continue poking around....

Kind regards and please let us know what you find,
Robert


Jason M Glatz wrote:
>
> Hello,
>
> I’m trying to assist a graduate student who is looking for the 
> latitude and longitude of an obscure mountain in the Philippines 
> called Mt. Alzapan (possibly spelled Alsapan). It is located on Luzon 
> around the provinces of Nueva Vizcaya or Quirino. He believes that it 
> should be between 1,000 and 2,000 meters tall. It is referenced in a 
> couple of botanical journals, but I have not been able to find it 
> using our maps, gazetteers (we are missing the 1^st volume of our 
> Philippine Board on Geographic Names Gazetteer), or  a lengthy Google 
> search. Any help you can provide would be greatly appreciated.
>
> Thanks,
> Jason
>
> Jason Glatz, Maps Specialist
>
> University Libraries (2014 Waldo Library)
>
> Western Michigan University
>
> 1903 W Michigan Ave
>
> Kalamazoo MI 49008-5353 USA
>