Editing Lupinus polyphyllus (section)

== Ecology ==
This lupine may represent a significant threat to the survival of the endangered [[Karner blue]] butterfly, due to its ease of hybridization with the Karner's food plant, ''[[Lupinus perennis]]'', the wild perennial lupine.<ref name="Carolyn">{{cite book |last=Summers |first=Carolyn |date=2010 |title=Designing Gardens with Flora of the American East |url=https://books.google.com/books?id=FMCK_Sl9AWwC&q=karner+blue+russell&pg=PA15 |location=United States |publisher=Rutgers University Press |page=15 |isbn=978-0813549323 }}</ref><ref name="DNR">{{cite web|url=http://dnr.wi.gov/topic/Invasives/fact/BigleafLupine.html|title=Big-leaf lupine (Lupinus polyphyllus)|publisher=Wisconsin Department of Natural Resources|accessdate=2018-01-13}}</ref> Some sources argue that commercial lupine seeds are already questionable for the Karner due to hybridization. Additionally, incompatible lupines continue to be introduced by humans into places where the Karner lives or once lived.<ref name="Carolyn"/>