Chromosome numbers of selected Alaskan vascular plants

Chromosome numbers and taxonomic notes are presented for 33 Alaskan vascular taxa. First counts are reported for Aquilegia brevistyla Hooker, Draba murrayi Mulligan, Erysimum angustatum Rydberg, Smelowskia calycina ssp. media Drury & Rollins, Thlaspi arcticum Porsild, Oxytropis kobukensis Welsh, Cryptantha shackletteana Higgins, Mertensia drummondii (Lehmann) G. Don, and Erigeron muirii Gray. New ploidy levels are noted for Draba lactea Adams, Oxytropis campestris ssp. varions (Rydberg) Barneby, Oxytropis viscida Nuttall, Oxytropis scammaniana Hultén, Mertensia paniculata (Aiton) G. Don, Castilleja caudata (Pennell) Rebrecht, Artemisia senjavinensis Besser, Erigeron caespitosus Nuttall, and Erigeron grandiflorus Hooker. Infraspecific ploidy is discussed for Luzula arcuata (Wahlenberg) Swartz, Lloydia serotina (L.) Rchb., Rumex arcticus Trautvetter, Claytonia sibirica L., Papaver nudicaule L., Oxytropis campestris (L.) DC. complex, Epilobium latifolium L., and Artemisia tilesii Ledebour.