New Records of Vascular Plants in the Yukon Territory VI WILLIAM J. CODY1,CATHERINE E. KENNEDY2,BRUCE BENNETT2, and PHIL CASWELL3 1Biodiversity, National Program on Environmental Health, Agriculture and Agri-Food Canada, Wm. Saunders Building (49), Central Experimental Farm, Ottawa, Ontario K1A 0C6 Canada 2Department of Environment, Government of the Yukon, Box 2703, Whitehorse, Yukon Y1A 2C6 Canada 3P. O. Box 91, Roxbury, New York 12474 USA Cody, William J., Catherine E. Kennedy, Bruce Bennett, and Phil Caswell. 2004. New records of vascular plants in the Yukon Territory VI. Canadian Field-Naturalist 118(4): 558-578. Based on field reconnaissance mainly in 2002 in the southern part of the Yukon and particularly in and adjacent to Kluane National Park, information is provided on geographically significant plant occurrences. Six native taxa, Atriplex alaskensis, Claytonia megarrhiza, Corispermum ochotense var. alaskanum, Oxytropis arctica, Polemonium acutiflorum forma lacteum and Polemo- nium boreale forma albiflorum, and four introduced taxa. Arabis caucasica, Camelina sativa, Senecio eremophilus, and Setaria viridis are reported new to the known flora of the Yukon Territory. Significant range extensions for 158 native and 21 introduced taxa are included. Parrya arctica, Armoracia rusticana, Atriplex patula and Papaver nudicaule ssp. nudicaule are excluded from the Yukon flora. Key Words: Vascular plants,Yukon Territory, flora, new records, range extensions, phytogeography. Since the writing of New Records of Vascular Plants The taxa addressed in the body of this paper appear in the Yukon Territory V (Cody et al. 2003), a consider- in a synoptic list by Yukon status in alphabetical order. able number of plant specimens have been submitted The taxa are then discussed in taxonomic order, as pre- to Cody for identification and confirmation. The major sented in the Flora of the Yukon Territory with citation submissions include the following locations and col- of specimens and other pertinent information. Common lectors: (1) Kluane National Park and vicinity by Phil names follow Cody (1996) and Douglas et al. (1998- Caswell for the National Park Service as part of on- 2001). going botanical inventories; (2) W. J. Cody and Cath- erine Kennedy spent four days collecting specimens in Synoptic List by Yukon Status the Fort Selkirk area assessing the flora of that region; Errata in New Records: (5) (3) W. J. Cody and Margaret Cody studied changed Carex stylosa vegetation along the southern highways; (4) Bruce Ben- Douglasia arctica nett conducted studies adjacent to the North Canol Poa nemoralis revised to Poa interior Road, assisting with rare plant surveys for Yukon- Armoracia rusticana revised to Rorippa barbareifolia Papaver nudicaule ssp. nudicaule revised to Papaver croceum Charley Rivers National Park and interesting areas while boating down the Yukon River; (5) Rhonda Rosie Native Taxa New to the Yukon Territory: (6) visited sites adjacent to Nisling Lake and Morris Lake Atriplex alaskensis for the Yukon Territory Government and Parks Branch; Claytonia megarrhiza (6) Stu Withers visited former mine sites at Atlin Lake Corispermum ochotense var. alaskanum Oxytropis arctica and Deadman Creek in connection with reclamation of Polemonium acutiflorum forma lacteum vegetation and soil stabilization; (7) with his continuing Polemonium boreale forma albiflorum interest in vegetation habitats Greg Brunner collected plant specimens from areas adjacent to the Klondike Introduced Taxa New to the Yukon Territory: (4) River and Dawson City. Arabis caucasica Camelina sativa This paper serves to further update the Flora of the Senecio eremophilus Yukon Territory (Cody 1996) and Flora of the Yukon Setaria viridis Territory, Second Edition (Cody 2000) along with other records recently published (Cody et al. 1998, 2000, Range Extensions of Native Taxa within the Yukon 2001, 2002, 2003). The floristic information presented Territory: (158) earlier and updated here is essential for biological re- Agrostis filiculmis Allium schoenoprasum ssp. sibiricum search and ongoing work relating to agriculture, fores- Alyssum obovatum try, sustainable resource management and wildlife Amelanchier alnifolia management. With additions of six native and four Arabis holboellii var. retrofracta introduced species reported here, the flora now includes Arabis holboellii var. secunda 1181 species. The new native species are all rare (as Aster alpinus ssp. vierhapperi defined by Douglas et al. 1981). Aster falcatus 558 2004 CODY,KENNEDY,BENNETT, AND CASWELL:PLANTS IN YUKON VI 559 Atriplex subspicata Isoetes ?maritima Bromus ciliatus Juncus bufonius Callitriche anceps Juncus filiformis Cardamine bellidifolia Kobresia simpliciuscula Carex albo-nigra Koeleria macrantha Carex athrostachya Lepidium densiflorum var. densiflorum Carex atrosquama Lupinus nootkatensis Carex capillaris ssp. chlorostachys Luzula arcuata ssp. unalaschkensis Carex crawfordii Maianthemum canadense ssp. interius Carex eleusinoides Mertensia paniculata var. alaskana Carex foenea Mimulus guttatus Carex limosa Minuartia dawsonensis Carex loliacea Minuartia elegans Carex obtusata Minuartia macrocarpa Carex pachystachya Minuartia yukonensis Carex pellita Montia fontana Carex petasata Myriophyllum verticillatum Carex praegracilis Nuphar polysepalum Carex rossii Orobanche fasciculata Carex supina ssp. spaniocarpa Oxytropis campestris ssp. varians Carex sychnocephala Pedicularis oederi Carex viridula Phacelia mollis Cassiope tetragona ssp. saximontana Phlox hoodii Cerastium arvense Phyllodoce glanduliflora Chamaerhodos erecta ssp. nuttallii Pinguicula villosa Chenopodium capitatum Pinus contorta ssp. latifolia Cicuta maculata var. angustifolia Plantago canescens Cryptogramma crispa var. acrostichoides Plantago maritima Deschampsia brevifolia Poa interior Descurainia incisa var. incisa Poa leptocoma Douglasia alaskana Poa secunda Draba aurea Podistera macounii Draba corymbosa Polygonum lapathifolium Draba crassifolia Potamogeton alpinus ssp. tenuifolius Draba glabella Potamogeton berchtoldii Draba nemorosa Potamogeton gramineus Draba ogilviensis Potamogeton pectinatus Draba palanderiana Potamogeton praelongus Draba porsildii Potamogeton subsibiricus Draba stenoloba Potamogeton zosteriformis Dryas hookeriana Potentilla arguta var. convallaria Eleocharis uniglumis Primula eximia Elymus alaskanus ssp. alaskanus Puccinellia interior Elymus glaucus Pulsatilla ludoviciana Elymus macrourus Pyrola minor Elymus spicatus Ranunculus aquatilis var. subrigidus Elymus trachycaulus ssp. andinus Ranunculus occidentalis var. brevistylis Erigeron caespitosus Rhinanathus minor ssp. borealis Erigeron hyperboreus Ribes oxyacanthoides ssp. oxyacanthoides Eriophorum brachyantherum Rorippa barbareifolia Eritrichium aretioides Rosa woodsii Eritrichium chamissonis Salix alaxensis ssp. longistylis Euphrasia subarctica Salix glauca var. acutifolia Festuca brachyphylla Salix pseudomyrsinites Festuca richardsonii Salix rotundifolia ssp. dodgeana Festuca saximontana Sambucus racemosa ssp. pubens Gentianella tenella Saxifraga caespitosa Geum aleppicum ssp. strictum Saxifraga eschscholtzii Geum rossii Saxifraga foliolosa Glyceria striata var. stricta Saxifraga nelsoniana ssp. pacifica Gymnocarpium jessoense ssp. parvulum Saxifraga rufopilosa Harrimanella stellariana Saxifraga tricuspidata Hordeum brachyantherum Scirpus rollandii Iris setosa ssp. interior Silene involucrata ssp. tenella Isoetes echinospora Silene williamsii 560 THE CANADIAN FIELD-NATURALIST Vol. 118 Solidago canadensis var. salebrosa 02-821, 12 Aug. 2002 (DAO) (determined by D. F. Spiranthes romanzoffiana Brunton). Stellaria umbellata The first specimen cited above is an extension of the Stipa comata known range in the Territory (Cody 1996) of about 180 kilo- Stipa nelsonii ssp. dorei meters southwest of the vicinity of Francis Lake. The second Stipa richardsonii specimen is from a site about 500 kilometers northwest of Subularia aquatica ssp. americana Frances Lake and about 430 kilometers northwest of the Tofieldia coccinea Morris Lake site. Trientalis europaea Triglochin palustre Isoetes ?maritima Underw., Maritime Quillwort – Typha latifolia YUKON: washed ashore, WNW side of Trout Lake, Urtica dioica ssp. gracilis 68°49’27"N 138°45'8"W, J. M. Line 2000-72, 28 July Utricularia minor 2000 (DAO) (determined by D. F. Brunton & D. M. Vaccinium membranaceum Britton). Vahlodea atropurpurea The fragmented specimens found washed up along the Valeriana sitchensis shore of the lake possessed only immature female spores Vicia americana which were mostly densely tuberculate but could not defi- Viola renifolia var. brainerdii nitely be determined as I. maritima. If this could be verified Woodsia alpina by more mature specimens from Trout Lake it would be only Woodsia ilvensis the third known location in the Territory and a range exten- Range Extensions of Introduced Taxa within the sion of about 260 kilometers northwest of Vittrewka Lake Yukon Territory: (21) (Cody et al. 2001). Agropyron pectiniforme Isoetes maritima Underw., Maritime Quillwort – It Agropyron sibiricum has been brought to our attention by Lori Schroeder Agrostis gigantea (Environment Yukon) that specimen data according Avena sativa to Greg Brunner’s field notebook for his collection Brassica rapa #39-99 which was published in Cody et al. (2001) Bromus inermis Capsella bursa-pastoris should be: Peel River Wetland Study Turner Lake, Elytrigia intermedia 66°11'N 134°14'W, 2 July 1999. Galeopsis tetrahit ssp. bifida PTERIDACEAE Lepidium densiflorum