The kind people from the bromeliad list gave me the following reference on
_Puya_.
Rees WE & Roe NA (1980): Puya raimondii (Pitcairnioideae, Bromeliaceae) and
birds: a hypothesis on nutrient relationships. Can. J. Bot. 58:1262-1268.
Please note the "H" word!!!
It was also mentioned that _P. mirabilis_ was fairly adept at catching
intrusive fingers.
Take care!
Jeff