Arceuthobium campylopodum subsp. monticola

(Hawksworth, Wiens & Nickrent) Nickrent

Phytoneuron 2012-51: 10. 2012.

Common names: Western white pine dwarf mistletoe
Endemic
Basionym: Arceuthobium monticola Hawksworth, Wiens & Nickrent, Novon 2: 205. 1992
Treatment appears in FNA Volume 12. Treatment on page 432. Mentioned on page 429, 433.

Plants forming localized infections only. Stems olive green or brown, 5–7(–10) cm; third internode 8–12(–15) × 1.5–1.7(–2) mm, dominant shoot 2–4 mm diam. at base. Staminate flowers 3 mm diam.; petals 3. Fruits 4–4.5 × 2–2.5 mm.


Phenology: Flowering Jul–Aug; fruiting Oct–Nov.
Habitat: Coniferous forests, especially with western white pine.
Elevation: 700–1900 m.

Discussion

Meiosis likely occurs in July, with fruits maturing 15 months after pollination.

The principal host of subsp. monticola is Pinus monticola; secondary to rare hosts include Picea breweriana, Pinus jeffreyi, and P. lambertiana. It is endemic to the Klamath and Siskiyou Mountains.

Selected References

None.

Lower Taxa

None.
Daniel L. Nickrent +
(Hawksworth, Wiens & Nickrent) Nickrent +
Arceuthobium monticola +
Western white pine dwarf mistletoe +
Calif. +  and Oreg. +
700–1900 m. +
Coniferous forests, especially with western white pine. +
Flowering Jul–Aug +  and fruiting Oct–Nov. +
Phytoneuron +
Razoumofskya campylopoda +
Arceuthobium campylopodum subsp. monticola +
Arceuthobium campylopodum +
subspecies +