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Wildlife, Animals, and Plants |
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INTRODUCTORY
ABBREVIATION:PINPONS SYNONYMS:Pinus ponderosa ssp. scopulorum (Watson) Weber [306] Pinus arizonica var. stormiae Mart. (pino real) [171,250] NRCS PLANT CODE [292]:PIPOS COMMON NAMES:interior ponderosa pine Rocky Mountain ponderosa pine pino real TAXONOMY:The scientific name of interior ponderosa pine is Pinus ponderosa var. scopulorum Engel. (Pinaceae) [78,114,175,177,210,271]. It is 1 of 3 widely recognized varieties of ponderosa pine (P. ponderosa Laws.); the other 2 are Pacific ponderosa pine (P. p. var. ponderosa) and Arizona pine (P. p. var. arizonica) [114,175]. The taxonomy of the ponderosa pine complex is not completely resolved. There are morphological and distributional overlaps among the varieties, and disagreement among authorities regarding the geographical boundaries of ponderosa pine infrataxa including interior ponderosa pine [80,114,189,250]. Although distinct, varieties of ponderosa pine show differences on broad latitudinal clines. Dodge [95] described the species as "a continuation of a large group of populations from the Central American Highlands to British Columbia." Ponderosa pine in the northern interior are either classified entirely as P. p. var. scopulorum [114], or as P. p. var. scopulorum east of the Continental Divide and as P. p. var. ponderosa west of the Continental Divide [189]. Ponderosa pine populations that extend northward into western Texas from Coahuila are either classified as P. p. var. scopulorum [114] or as P. arizonica var. stormiae Mart. [171,175,250]. In this report, "ponderosa pine" refers to the species as a whole. "Southwestern ponderosa pine" refers to both Arizona pine and interior ponderosa pine in the Southwest. Information on ponderosa pine in Texas and east of the Continental Divide in Montana and Wyoming is included herein; Pacific ponderosa pine and Arizona pine are covered in separate Fire Effects Information System reports. Intraspecies hybridization and introgression occur between all 3 varieties of ponderosa pine. Interior ponderosa x Arizona pine hybrids may bear 3- and 4-needle fascicles; 4- and 5-needle fascicles; or 3-, 4-, and 5-needle fascicles, sometimes on the same spur branch [36,95,114,233]. Interior ponderosa and Arizona pines also hybridize and introgress with Apache pine (P. engelmannii); 3-taxa hybrids (interior ponderosa x Arizona x Apache pines) occur occasionally [233]. LIFE FORM:Tree FEDERAL LEGAL STATUS:No special status OTHER STATUS:No entry AUTHORSHIP AND CITATION:Howard, Janet L. (2001, September). Pinus ponderosa var. scopulorum. In: Remainder of citation
Related categories for SPECIES: Pinus ponderosa var. scopulorum | Interior Ponderosa Pine |
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