Habitat and Ecology
Pinus flexilis var. reflexa is a conifer tree of subalpine habitats on the highest mountains within its range. Occurs between 1,900 and 3,000 m asl. The species is one of several in the genus Pinus of western North America that can withstand extreme conditions of climate on bare rock or scree without any other vegetation cover. On these sites it occurs either alone or with Pinus aristata in the SE and P. longaeva in the SW. The seeds, which only have rudimentary wings, are mostly dispersed by rodents and birds.
IUCN Red List Assessment
Red List Category
Red List Criteria
White Pine Blister Rust (WPBR) caused by the non-native pathogen Cronartium ribicola does not appear to have reached the isolated subpopulations of this variety. Likewise, no epidemics of Mountain Pine Beetle (MPB) have been reported yet. However, as soon as either of these threats starts to impact this variety, it will quickly qualify for a more threatened category. The combination of WPBR with the MPB epidemic compromises the regeneration cycle of the pine populations and reduces their resilience to recover from this and any other disturbances. Extirpation of subpopulations is probable. See the species account for full details on the impacts of these two threats.