. . . . . . . . . "Bombus crotchii" . . "Helianthus annuus" . . "Adam Searcy. 2017. Bombus crotchii associated species with names lookup Helianthus annuus. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/6947646> on 05 Apr 2018." . . . . "http://iNaturalist.org is a place where you can record what you see in nature, meet other nature lovers, and learn about the natural world." .