  pines are conifer trees in the genus pinus ,sunset western garden book, 1995:606â607 in the family pinaceae. they are the only genus in the subfamily pinoideae. counting varieties and subspecies, the plant list of the royal botanic gardens, kew and missouri botanical garden accepts 175 names of pines as current, together with some thirty or forty unresolved and many more synonyms or misapplied.the plant list (2013). version 1.1. published on the internet; http://www.theplantlist.org/ (accessed june 2014) ==etymology== the modern english name pine derives from latin pinus which some have traced to the indo-european base *pÄ«t- âresinâ (source of english pituitary.pine. (2006). in word origins. retrieved from http://www.credoreference.com/entry/acbwordorig/pine in the past (pre-19th century) they were often known as fir, from old norse fyrre, by way of middle english firre. the old norse name is still used for pines in some modern north european languages, in danish fyr, in norwegian fura/fure/furu, swedish fura/furu, dutch vuren, and fÃ¶hre in german, but in modern english, fir is now restricted to fir (abies) and douglas-fir (pseudotsuga). also the pine needle is often associated with good will among canadians (especially around christmas time). == taxonomy, nomenclature and codification ==  pines are gymnosperms. the genus is divided into three subgenera, based on cone, seed and leaf characters: *pinus subg. pinus, the yellow, or hard pine group, generally with harder wood and two or three needles per fascicle.{{cite book|author1=burton verne barnes|author2=warren herbert wagner|title=michigan trees: a guide to the trees of the great lakes region|url=http://books.google.com/books?id=1wosiw4kwo8c&pg=pa81|date=january 2004|
Invasive_plant_species_in_South_Africa Pinaceae Pinus