Pine Nuts
Pinus maximartinezii
Discovery in 2011 of a new population of this rare species.
Excellent photographs, the text is in Spanish.
González–Elizondo M.
et al. 2011. 'Pinus
maximartinezii Rzed. (Pinaceae), first record for Durango,
second locality for the species'
http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S0187-71512011000300005&lang=en