Arceuthobium microcarpum

{{Short description|Species of dwarf mistletoe}}

{{Speciesbox

| genus = Arceuthobium

| species = microcarpum

| authority = (Engelm.) Hawksw. & Wiens

| synonyms = Arceuthobium douglasii var. microcarpum Engelm. in Rothr.

Arceuthobium campylopodum subsp. microcarpum (Engelm.) Nickrent

Razoumofskya microcarpa (Engelm.) Wooton & Standl.

}}

Arceuthobium microcarpum, called the "western spruce dwarf mistletoe," is a parasitic plant known only from Arizona and New Mexico. It is found mostly on spruce trees (Picea spp.) but also occasionally on Rocky Mountain bristlecone pine (Pinus aristata Engelm.). The specific epithet "microcarpum" means "small fruited," in reference to the berries, which are only 3.5 mm long.Hawksworth, F.G., & D. Wiens. 1993. Viscaceae, Mistletoe Family. Journal of the Arizona-Nevada Academy of Science 27:241-245

Arceuthobium microcarpum (Engelm.) Hawksw. & Wiens, Brittonia 22(3): 268. 1970.Hawksworth, F.G., & D. Wiens, Brittonia 22(3): 268. 1970. = Arceuthobium douglasii var. microcarpum Engelm. in Rothr., Rep. U.S. Geogr. Surv., Wheeler vol. 6, Botany 253. 1879.Rothrock, J.T. Report Upon United States Geographical Surveys West of the One Hundredth Meridian, in Charge of First Lieut. Geo. M. Wheeler ... vol. 6, Botany 253. 1879. = Arceuthobium campylopodum subsp. microcarpum (Engelm.) Nickrent, Phytoneuron 2012–51: 10. 2012.Nickrent, D.L. Phytoneuron 2012–51: 10. 2012. = Razoumofskya microcarpa (Engelm.) Wooton & Standl., Contr. U.S. Natl. Herb. 19: 179. 1915.Wooton, E.O., & P.C. Standley. Contributions from the United States National Herbarium 19: 179. 1915.