1992
Sivinski, R.C. and K. Lightfoot. 1992. 1992 status summary for the McKittrick pennyroyal (Hedeoma apiculatum). Prep. by NM Forestry and Resources Conservation Division for U.S. Fish and Wildlife Service. 33 p.
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Hedeoma apiculata
Sivinski, R.C. and K. Lightfoot. 1992. 1992 status summary for the McKittrick pennyroyal (Hedeoma apiculatum). Prep. by NM Forestry and Resources Conservation Division for U.S. Fish and Wildlife Service. 33 p.
Knight, P.J. 1989. Survey of Big Canyon, Guadalupe Mountains for Hedeoma apiculata.
Thatcher, C. Olsen, O.V. 1987-1988 McKittrick Pennyroyal- Hedeoma apiculatum, Guadalupe Mountains National Park. USFS
Irving, R. 1985. McKittrick Pennyroyal, Hedeoma apiculatum W.S. Stewart Recovery Plan. U.S. Fish and Wildlife Service, Albuquerque, New Mexico. iv + 46pp.
Worthington, R. 2000. Inventory of the Flora of the New Mexico Portion of the Guadalupe Mountains, Otero and Eddy Counties, New Mexico, Working Second Draft. USFS.
Worthington, R. 1999. Monitoring of populations of Hedeoma apiculatum Stewart (Lamiaceae) in Lincoln National Forest, Guadalupe Mountains, Eddy Co., New Mexico. 7 p. + field notes.
Worthington, R. 2002. Inventory of the Flora of the Guadalupe Mountains, New Mexico and Texas. Second Working Draft. USFS
Worthington, R. 2001. Inventory of the Flora of the New Mexico Portion of the Guadalupe Mountains, Otero and Eddy Counties, New Mexico. Working Third Draft. USFS
Sivinski, R. 1991. Annual Section 6 performance report monitoring endangered plants (job 1). Unpublished report for U.S. Fish and Wildlife Service, Albuquerque, NM. 135 p + maps.