Arceuthobium campylopodum subsp. occidentale
Phytoneuron 2012-51: 10. 2012.
Common names: Digger pine dwarf mistletoe
Endemic
Basionym: Arceuthobium occidentale Engelmann in J. T. Rothrock
Revision as of 14:43, 18 September 2019 by FNA>Volume Importer
Plants usually forming localized infections only. Stems yellow or orange, 8(–17) cm; third internode 7–12.7(–18) × 1.5–1.8(–3.5) mm, dominant shoot 1.5–5 mm diam. at base. Staminate flowers 3 mm diam.; petals 3–4. Fruits 4.5 × 3 mm.
Phenology: Flowering Sep–Nov(–Dec); fruiting (Sep–)Oct–Jan(–Feb).
Habitat: Coniferous and mixed forests, especially with digger pine.
Elevation: 30–1200 m.
Discussion
Meiosis occurs in August, with fruits maturing 13 months after pollination.
Pinus sabiniana is the principal host of subsp. occidentale; secondary hosts include Pinus attenuata, P. coulteri, P. jeffreyi, and P. ponderosa, as well as some exotic species of pines. Subspecies occidentale occurs in the foothills surrounding the Central Valley and in the Coast Ranges.
Selected References
None.
Lower Taxa
None.