List of Arceuthobium species

Arceuthobium is a genus of parasitic plants in the sandalwood family commonly known as dwarf mistletoes. Most species of Arceuthobium specialize on a small number of conifer species, on which they grow and from which they derive water and nutrients; host preference has been considered taxonomically important by most botanists.

The taxonomy of this genus is difficult to resolve. As with many other parasites, Arceuthobium plants have reduced morphological features (for example, minute, scale-like leaves) that make taxa difficult to distinguish morphologically.[1] Phylogenetic studies have also revealed little genetic differentiation between species in several of the taxonomic sections, including Globosa, Rubra, Vaginata, and Campylopoda, indicating that species boundaries in these groups may still be forming.[2] Nevertheless, some monophyletic clades have been identified even in these sections.[3] Ultimately, modern treatments of the genus vary widely, including as many as 38 species[4] or as few as 26 species,[2] with Campylopoda in particular comprising between one[5] and thirteen[4] species.

This list summarizes the taxa currently recognized by Plants of the World Online, organized using the subgenera and sections from Nickrent et al. (2004).[2][6] The taxonomy of the New World species (subgenus Vaginata) largely follows Kenaley and Mathiasen (2025).[4]

Subgenus Arceuthobium

Section Arceuthobium

Section Chinense Nickrent

Section Azorica

Subgenus Vaginata

Section Americana Nickrent

Section Penda Nickrent

  • Arceuthobium guatemalense D. Hawksw. & Wiens (Parasite of Pinus ayacahuite. Also the most endangered Arceuthobium due to extensive logging in Guatemala)[2]
  • Arceuthobium pendens D. Hawksw. & Wiens (Parasite of piñyon pines)[2]

Section Globosa Nickrent

  • Arceuthobium globosum D. Hawksw. & Wiens
    • Arceuthobium globosum subsp. globosum
    • Arceuthobium globosum subsp. aureum (D. Hawksw. & Wiens) Mathiasen
    • Arceuthobium globosum subsp. grandicaule D. Hawksw. & Wiens
    • Arceuthobium globosum subsp. petersonii (D. Hawksw. & Wiens) Mathiasen

Section Pusilla Nickrent

Section Rubra D. Hawksw. & Wiens

  • Arceuthobium gillii D. Hawksw. & Wiens
  • Arceuthobium nigrum D. Hawksw. & Wiens
  • Arceuthobium rubrum D. Hawksw. & Wiens including: A. oaxacanum D. Hawksw. & Wiens
  • Arceuthobium yecorense D. Hawksw. & Wiens

Section Vaginata D. Hawksw. & Wiens

This section has the broadest range of host species, parasitizing 20 species of Pinus.[2]

  • Arceuthobium hondurense D. Hawksw. & Wiens
    • Arceuthobium hondurense subsp. hondurense
    • Arceuthobium hondurense subsp. hawksworthii (Wiens & Shaw) Mathiasen
  • Arceuthobium strictum D. Hawksw. & Wiens
  • Arceuthobium vaginatum (Willd.) Presl.
    • Arceuthobium vaginatum subsp. vaginatum
    • Arceuthobium vaginatum subsp. cryptopodum (Engelm.) D. Hawksw. & Wiens
    • Arceuthobium vaginatum subsp. durangense D. Hawksw. & Wiens

Section Minuta D. Hawksw. & Wiens

Section Campylopoda D. Hawksw. & Wiens

References

  1. ^ "Arceuthobium - FNA". floranorthamerica.org. Retrieved 2025-10-20.
  2. ^ a b c d e f g h i j k l m Nickrent, D.L.; M.A. García; M.P. Martín; R.L. Mathiasen (2004). "A phylogeny of all species of Arceuthobium (Viscaceae) using nuclear and chloroplast DNA sequences". American Journal of Botany. 91 (1): 125–138. Bibcode:2004AmJB...91..125N. doi:10.3732/ajb.91.1.125. PMID 21653369.
  3. ^ Schneider, Adam C.; Sanders, Kate M.; Idec, Jacob H.; Lee, Yun Jee; Kenaley, Shawn C.; Mathiasen, Robert L. (2021-08-11). "Plastome and Nuclear Phylogenies of Dwarf Mistletoes ( Arceuthobium : Viscaceae)". Systematic Botany. 46 (2): 389–402. Bibcode:2021SysBo..46..389S. doi:10.1600/036364421X16231782047307. ISSN 0363-6445.
  4. ^ a b c Kenaley, Shawn C.; Mathiasen, Robert L. (2025). "Dwarf Mistletoes (Arceuthobium, Viscaceae) of North America: Classification Systems, Phylogenetic Relationships, and Taxonomic Characteristics". Plants. 14 (13): 2051. Bibcode:2025Plnts..14.2051K. doi:10.3390/plants14132051. ISSN 2223-7747. PMC 12252426. PMID 40648060.
  5. ^ Kuijt, Job (1960). "The Distribution Of Dwarf Mistletoes, Arceuthobium, In California". Madroño. 15 (5): 129–139. ISSN 0024-9637. JSTOR 41423001.
  6. ^ "Arceuthobium M.Bieb. | Plants of the World Online | Kew Science". Plants of the World Online. Retrieved 2025-10-20.
  7. ^ Hawksworth, F.G.; D. Wiens (1995). Dwarf mistletoe: biology, pathology, and systematics. USDA Forest Service.
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