Arceuthobium campylopodum subsp. apachecum

(Hawksworth & Wiens) Nickrent

Phytoneuron 2012-51: 10. 2012.

Common names: Apache dwarf mistletoe
Basionym: Arceuthobium apachecum Hawksworth & Wiens Brittonia 22: 266. 1970
Treatment appears in FNA Volume 12. Treatment on page 431. Mentioned on page 429.

Plants forming witches brooms. Stems yellow, green, or red, 3.5 (–9) cm; third internode 5–7.2 (–10) × 1–1.5 (–2) mm, dominant shoot 1–2 mm diam. at base. Staminate flowers 2.7 mm diam.; petals 3–4 (–5). Fruits 4 × 2.5 mm.


Phenology: Flowering Jul–Sep; fruiting Aug–Oct.
Habitat: Coniferous forests with southwestern white pine.
Elevation: 2000–3000 m.

Distribution

V12 295-distribution-map.jpg

Ariz., N.Mex., Mexico (Chihuahua)

Discussion

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

Subspecies apachecum is known only from a portion of the range of its only host tree, Pinus strobiformis. Subspecies blumeri also utilizes this host, but the two taxa are not sympatric.

Selected References

None.

Lower Taxa

None.
Daniel L. Nickrent +
(Hawksworth & Wiens) Nickrent +
Arceuthobium apachecum +
brown +, orange +, yellow +, olive green +  and yellowish green +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (?) +  and 0.3 cm3 mm <br />0.003 m <br /> (?) +
scale-like +
10 cm100 mm <br />0.1 m <br /> (22 cm220 mm <br />0.22 m <br />) +
3cm +  and 10cm +
Apache dwarf mistletoe +
spikelike +
Ariz. +, N.Mex. +  and Mexico (Chihuahua) +
2000–3000 m. +
globose +  and pyriform +
2.7 cm27 mm <br />0.027 m <br /> (?) +
2.5 cm25 mm <br />0.025 m <br /> (?) +
Coniferous forests with southwestern white pine. +
terminal +  and axillary +
bisexual +  and unisexual +
0.72 cm7.2 mm <br />0.0072 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.72 cm7.2 mm <br />0.0072 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
connate +
scale-like +
pinnate +  and entire +
articulated +
connate +  and distinct +
Flowering Jul–Sep +  and fruiting Aug–Oct. +
2[-3]-carpellate +
Phytoneuron +
mucilaginous +
0.33 cm3.3 mm <br />0.0033 m <br /> (?) +  and 0.55 cm5.5 mm <br />0.0055 m <br /> (?) +
pyriform +  and ellipsoid +
0.23 cm2.3 mm <br />0.0023 m <br /> (?) +  and 0.4 cm4 mm <br />0.004 m <br /> (?) +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Illustrated +
3 (?) +  and 4 (?) +
red;green;red;green;yellow +
pendulous +  and erect +
fanlike +
3.5 cm35 mm <br />0.035 m <br /> (?) +
undifferentiated +
Razoumofskya campylopoda +
Arceuthobium campylopodum subsp. apachecum +
Arceuthobium campylopodum +
subspecies +
spikelike +
mucilaginous +
evergreen +  and perennial +