Arceuthobium campylopodum subsp. campylopodum

unknown
Selected by author to be illustrated
Treatment appears in FNA Volume 12. Treatment on page 430. Mentioned on page 429, 431.
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Illustrator:
Plants usually forming witches' brooms. Stems yellow, green, olive green, orange, or brown, 8(–13) cm; third internode 7–11(–22) × 1.5–2(–2.5) mm, dominant shoot 1.5–5 mm diam. at base. Staminate flowers 3 mm diam.; petals 3(–4). Berries 5 × 3 mm.

Phenology: Flowering Aug–Oct; fruiting Sep–Nov.
Habitat: Coniferous forests with ponderosa or Jeffrey pine.
Elevation: 30–2500 m.

Distribution

V12 264-distribution-map.jpg

Calif., Idaho, Oreg., Wash., Mexico (Baja California).

Discussion

Meiosis occurs in July, with fruits maturing 13 months after pollination.

The distribution of </i>subsp.<i> campylopodum overlays a subset of the range of its principal host, Pinus ponderosa. The treatment of the host species by R. Kral (1993) recognized three varieties, two of which (P. ponderosa var. ponderosa and </i>var.<i> scopulorum) intergrade in Idaho, Montana, and Washington. With this taxonomic concept, the hosts of </i>subsp.<i> campylopodum would include P. ponderosa </i>subsp.<i> scopulorum. In contrast, The Gymnosperm Database (http://www.conifers.org/pi/Pinus_ponderosa.php) uses a modification of the classification by F. Lauria (1991), which suggests that P. ponderosa is composed of four subspecies: subspp. ponderosa, benthamiana, brachyptera, and scopulorum. Based on the geographical limits of these four subspecies, it appears that Arceuthobium campylopodum subsp. campylopodum is restricted to the P. ponderosa subspp. ponderosa and benthamiana. In addition to P. ponderosa, P. jeffreyi is another principal host. Both are heavily parasitized, thus this mistletoe is considered a major pathogen of these commercially important trees (F. G. Hawksworth and D. Wiens 1996). Secondary to rare hosts include P. attenuata, P. contorta, P. coulteri, P. lambertiana, and P. sabiniana.

References

None.

Lower Taxa

No lower taxa listed.

AuthorDaniel L. Nickrent +
Authorityunknown +
DistributionCalif. +, Idaho +, Oreg. +, Wash. + and Mexico (Baja California). +
Elevation30–2500 m. +
HabitatConiferous forests with ponderosa or Jeffrey pine. +
PhenologyFlowering Aug–Oct + and fruiting Sep–Nov. +
Publication titleBoston J. Nat. Hist. +
Publication year1850 +
ReferenceNone +
Source xmlhttps://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse grained fna xml/V12/V12 264.xml +
Special statusSelected by author to be illustrated +
SynonymsRazoumofskya campylopoda +
Taxon familyViscaceae +
Taxon nameArceuthobium campylopodum subsp. campylopodum +
Taxon parentArceuthobium campylopodum +
Taxon ranksubspecies +
VolumeVolume 12 +