Jepson eFlora
Key to families | Table of families and genera

Key to Arceuthobium

View taxon page for Arceuthobium

1. Stem generally << 2 cm, 2° branches rare; on Pseudotsuga menziesii, rarely on associated Abies ..... A. douglasii

1' Stem > 2 cm, 2° branches many; on Abies, Pinus, Tsuga, rarely Picea breweriana

2. Larger branches whorled; on Pinus contorta subsp. murrayana, rarely on associated Pinus ..... A. americanum

2' Larger branches not whorled, in 1 plane; on Abies, Pinus (except Pinus contorta subsp. murrayana), Tsuga, rarely Picea ..... A. campylopodum

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Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
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