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Scientific Name Symbol Common Name Rank Family Est. Occurrence Acer Negundo L

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Non-Native Plant Species List – Alaska Center for Conservation Science Scientific Name Symbol Common Name Rank Family Est. Occurrence Acer negundo L. ACNE2 boxelder Aceraceae Adjacent Canada only Achillea filipendulina Lam. ACFI fernleaf yarrow Asteraceae 2005 Alaska Achillea ptarmica L. ACPT sneezeweed 46 Asteraceae 1913 Alaska Achnatherum hymenoides (Roem. & Schult.) Barkworth ACHY Indian ricegrass Poaceae Alaska (unconfirmed) Acorus calamus L. ACCA4 calamus Acoraceae 1968 Alaska Acroptilon repens (L.) DC. ACRE3 hardheads 66 Asteraceae Adjacent Canada only Aegopodium podagraria L. AEPO bishop's goutweed 57 Apiaceae 2006 Alaska Agropyron cristatum (L.) Gaertn. AGCR crested wheatgrass Poaceae 1939 Alaska Agropyron desertorum (Fisch. ex Link) J.A. Schult. AGDE2 desert wheatgrass Poaceae 1941 Alaska Agropyron fragile (Roth) P. Candargy AGFR Siberian wheatgrass Poaceae Adjacent Canada only Agrostemma githago L. AGGI common corncockle Caryophyllaceae 2006 Alaska Agrostis capillaris L. AGCA5 colonial bentgrass Poaceae 1941 Alaska Agrostis gigantea Roth AGGI2 redtop Poaceae 1902 Alaska Agrostis stolonifera L. AGST2 creeping bentgrass Poaceae 1918 Alaska Aira caryophyllea L. AICA silver hairgrass Poaceae Adjacent Canada only Alchemilla mollis (Buser) Rothm. ALMO12 lady's mantle 56 Rosaceae 2006 Alaska Alchemilla monticola Opiz ALMO4 hairy lady's mantle 56 Rosaceae 1979 Alaska Alliaria petiolata (M. Bieb.) Cavara & Grande ALPE4 garlic mustard 70 Brassicaceae 2002 Alaska Alnus glutinosa (L.) Gaertn. ALGL2 European alder 61 Betulaceae Alaska Watchlist Alopecurus arundinaceus Poir. ALAR creeping meadow foxtail Poaceae 2011 Alaska Alopecurus geniculatus L. ALGE2 water foxtail 49 Poaceae 1940 Alaska Alopecurus pratensis L. ALPR3 meadow foxtail 52 Poaceae 1934 Alaska Alyssum alyssoides (L.) L. ALAL3 alyssum Brassicaceae 1954 Alaska Amaranthus albus L. AMAL prostrate pigweed Amaranthaceae 2003 Alaska Amaranthus retroflexus L. AMRE redroot amaranth 45 Amaranthaceae 1918 Alaska Amsinckia lycopsoides Lehm. AMLY tarweed fiddleneck Boraginaceae 1918 Alaska Amsinckia menziesii (Lehm.) A. Nelson & J.F. Macbr. AMME Menzies' fiddleneck Boraginaceae 1913 Alaska Anthemis cotula L. ANCO2 stinking chamomile 41 Asteraceae 1899 Alaska Anthemis tinctoria L. ANTI golden chamomile Asteraceae 1941 Alaska Anthoxanthum odoratum L. ANOD sweet vernalgrass Poaceae 1929 Alaska Anthriscus sylvestris (L.) Hoffm. ANSY wild chervil Apiaceae Alaska (unconfirmed) Arabis alpina L. ARAL8 alpine rockcress Brassicaceae Alaska Watchlist Non-Native Plant Species List – Alaska Center for Conservation Science Scientific Name Symbol Common Name Rank Family Est. Occurrence Arabis glabra (L.) Bernh. ARGL tower rockcress Brassicaceae 1829 Alaska Arctium lappa L. ARLA3 greater burdock Asteraceae Adjacent Canada only Arctium minus Bernh. ARMI2 common burdock 49 Asteraceae 2006 Alaska Armoracia rusticana G. Gaertn., B. Mey. & Scherb. ARRU4 horseradish Brassicaceae 1997 Alaska Arrhenatherum elatius (L.) P. Beauv. ex J. Presl & C. Presl AREL3 tall oatgrass Poaceae 1902 Alaska Artemisia biennis Willd. ARBI2 biennial wormwood Asteraceae 1968 Alaska Artemisia vulgaris L. ARVU common wormwood Asteraceae 2003 Alaska Asperugo procumbens L. ASPR German-madwort Boraginaceae 1941 Alaska Astragalus cicer L. ASCI4 chickpea milkvetch Fabaceae 2000 Alaska Atriplex hortensis L. ATHO garden orache Chenopodiaceae 1946 Alaska Atriplex patula L. ATPA4 spear saltbush Chenopodiaceae 1939 Alaska Aurinia saxatilis (L.) Desv. AUSA basket of gold Brassicaceae 1991 Alaska Avena fatua L. AVFA wild oat Poaceae 1941 Alaska Avena sativa L. AVSA common oat Poaceae 1918 Alaska Axyris amaranthoides L. AXAM Russian pigweed Chenopodiaceae Adjacent Canada only Barbarea verna (Mill.) Asch. BAVE early yellowrocket Brassicaceae Adjacent Canada only Barbarea vulgaris W.T. Aiton BAVU garden yellowrocket Brassicaceae Adjacent Canada only Bellis perennis L. BEPE2 lawndaisy Asteraceae 1937 Alaska Berteroa incana (L.) DC. BEIN2 hoary alyssum Brassicaceae 1970 Alaska Betula pendula Roth BEPE3 European white birch Betulaceae 2005 Alaska Bidens cernua L. BICE nodding beggartick Asteraceae 1909 Alaska Bidens frondosa L. BIFR devil's beggartick Asteraceae 1968 Alaska Borago officinalis L. BOOF common borage Boraginaceae 1998 Alaska Brachypodium sylvaticum (Huds.) P. Beauv. BRSY slender false brome 70 Poaceae Adjacent Canada only Brassica juncea (L.) Czern. BRJU brown mustard Brassicaceae 1925 Alaska Brassica napus L. BRNA rape 47 Brassicaceae 1913 Alaska Brassica rapa L. BRRA field mustard 50 Brassicaceae 1925 Alaska Bromus briziformis Fisch. & C.A. Mey. BRBR5 rattlesnake brome Poaceae 1941 Alaska Bromus hordeaceus L. BRHO2 soft brome Poaceae 1929 Alaska Bromus inermis Leyss. BRIN2 smooth brome 62 Poaceae 1914 Alaska Bromus japonicus Thunb. ex Murray BRAR5 field brome Poaceae Adjacent Canada only Bromus racemosus L. BRRA2 bald brome Poaceae 1941 Alaska Non-Native Plant Species List – Alaska Center for Conservation Science Scientific Name Symbol Common Name Rank Family Est. Occurrence Bromus secalinus L. BRSE rye brome Poaceae 1918 Alaska Bromus tectorum L. BRTE cheatgrass 78 Poaceae 1923 Alaska Calendula officinalis L. CAOF calendula Asteraceae 2006 Alaska Calystegia sepium (L.) R. Br. CASE13 hedge false bindweed Convolvulaceae 2006 Alaska Camelina microcarpa Andrz. ex DC. CAMI2 littlepod false flax Brassicaceae Adjacent Canada only Camelina sativa (L.) Crantz CASA2 gold-of-pleasure Brassicaceae 1918 Alaska Campanula glomerata L. CAGL2 Dane's blood Campanulaceae 2008 Alaska Campanula medium L. CAME20 Canterbury bells Campanulaceae 2008 Alaska Campanula rapunculoides L. CARA rampion bellflower 64 Campanulaceae 2007 Alaska Capsella bursa-pastoris (L.) Medik. CABU2 shepherd's purse 40 Brassicaceae 1918 Alaska Caragana arborescens Lam. CAAR18 Siberian peashrub 74 Fabaceae 1995 Alaska Carduus acanthoides L. CAAC spiny plumeless thistle 61 Asteraceae Adjacent Canada only Carduus nutans L. CANU4 nodding plumeless thistle 61 Asteraceae Adjacent Canada only Carduus pycnocephalus L. CAPY2 Italian plumeless thistle 61 Asteraceae Alaska Watchlist Carduus tenuiflorus W. Curtis CATE2 winged plumeless thistle 61 Asteraceae Alaska Watchlist Carex stipata Muhl. ex Willd. CAST5 awlfruit sedge Cyperaceae 1993 Alaska Carthamus tinctorius L. CATI safflower Asteraceae 2004 Alaska (unconfirmed) Castilleja tenuis (A. Heller) T.I. Chuang & Heckard CATE26 hairy Indian paintbrush Orobanchaceae 1918 Alaska Centaurea cyanus L. CECY2 garden cornflower Asteraceae 2008 Alaska Centaurea montana L. CEMO perennial cornflower 46 Asteraceae 2005 Alaska Centaurea scabiosa L. CESC2 greater knapweed Asteraceae 2004 Alaska Centaurea stoebe L. CEST8 spotted knapweed 86 Asteraceae 2004 Alaska Cerastium fontanum Baumg. ssp. vulgare (Hartm.) Greuter &CEFOV2 Burdet big chickweed 36 Caryophyllaceae 1899 Alaska Cerastium glomeratum Thuill. CEGL2 sticky chickweed 36 Caryophyllaceae 1913 Alaska Cerastium nutans Raf. CENU2 nodding chickweed Caryophyllaceae Adjacent Canada only Cerastium tomentosum L. CETO2 snow in summer Caryophyllaceae 2006 Alaska Chaenorhinum minus (L.) Lange CHMI dwarf snapdragon Plantaginaceae 2007 Alaska Chenopodium album L. var. album CHALA lambsquarters 37 Chenopodiaceae 1902 Alaska Chenopodium berlandieri Moq. var. berlandieri CHBEB2 pitseed goosefoot Chenopodiaceae 1941 Alaska Chenopodium leptophyllum (Moq.) Nutt. ex S. Watson CHLE4 narrowleaf goosefoot Chenopodiaceae 1950 Alaska Chenopodium rubrum L. CHRU red goosefoot Chenopodiaceae 1968 Alaska Chenopodium simplex (Torr.) Raf. CHSI2 mapleleaf goosefoot Chenopodiaceae 1995 Alaska Non-Native Plant Species List – Alaska Center for Conservation Science Scientific Name Symbol Common Name Rank Family Est. Occurrence Cichorium intybus L. CIIN chicory Asteraceae Adjacent Canada only Cirsium arvense (L.) Scop. CIAR4 Canada thistle 76 Asteraceae 1925 Alaska Cirsium vulgare (Savi) Ten. CIVU bull thistle 61 Asteraceae 1941 Alaska Clematis tangutica (Maxim.) Korsh. CLTA2 golden virginsbower Ranunculaceae 2009 Alaska Clinopodium douglasii (Benth.) Kuntze CLDO2 yerba buena Lamiaceae 1891 Alaska Collomia linearis Nutt. COLI2 tiny trumpet Polemoniaceae 1931 Alaska Conium maculatum L. COMA2 poison hemlock Apiaceae 2006 Alaska Conringia orientalis (L.) Dumort. COOR hare's ear mustard Brassicaceae Adjacent Canada only Convallaria majalis L. COMA7 European lily of the valley Liliaceae Alaska Watchlist Convolvulus arvensis L. COAR4 field bindweed 56 Convolvulaceae 2004 Alaska Conyza canadensis (L.) Cronquist COCA5 Canadian horseweed Asteraceae 1982 Alaska Cotoneaster simonsii Baker COSI82 Simons' cotoneaster Rosaceae 2014 Alaska Cotula coronopifolia L. COCO7 common brassbuttons 42 Asteraceae 1932 Alaska Crepis capillaris (L.) Wallr. CRCA3 smooth hawksbeard Asteraceae 1996 Alaska Crepis tectorum L. CRTE3 narrowleaf hawksbeard 56 Asteraceae 1970 Alaska Cryptantha torreyana (A. Gray) Greene CRTO4 Torrey's cryptantha Boraginaceae 1902 Alaska Cytisus scoparius (L.) Link CYSC4 Scotch broom 69 Fabaceae 1983 Alaska Dactylis glomerata L. DAGL orchardgrass 53 Poaceae 1902 Alaska Daphne mezereum L. DAME3 paradise plant Thymelaeaceae 1998 Alaska Daucus carota L. DACA6 Queen Anne's lace Apiaceae 2005 Alaska Deschampsia danthonioides (Trin.) Munro DEDA annual hairgrass Poaceae 1941 Alaska Deschampsia elongata (Hook.) Munro DEEL slender hairgrass 35 Poaceae 1945 Alaska Descurainia sophia (L.) Webb ex Prantl DESO2 herb sophia 41 Brassicaceae 1920 Alaska Dianthus barbatus L. DIBA sweetwilliam Caryophyllaceae 1995 Alaska Dianthus deltoides
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  • Notes on Identification Works and Difficult and Under-Recorded Taxa

    Notes on Identification Works and Difficult and Under-Recorded Taxa

    Notes on identification works and difficult and under-recorded taxa P.A. Stroh, D.A. Pearman, F.J. Rumsey & K.J. Walker Contents Introduction 2 Identification works 3 Recording species, subspecies and hybrids for Atlas 2020 6 Notes on individual taxa 7 List of taxa 7 Widespread but under-recorded hybrids 31 Summary of recent name changes 33 Definition of Aggregates 39 1 Introduction The first edition of this guide (Preston, 1997) was based around the then newly published second edition of Stace (1997). Since then, a third edition (Stace, 2010) has been issued containing numerous taxonomic and nomenclatural changes as well as additions and exclusions to taxa listed in the second edition. Consequently, although the objective of this revised guide hast altered and much of the original text has been retained with only minor amendments, many new taxa have been included and there have been substantial alterations to the references listed. We are grateful to A.O. Chater and C.D. Preston for their comments on an earlier draft of these notes, and to the Biological Records Centre at the Centre for Ecology and Hydrology for organising and funding the printing of this booklet. PAS, DAP, FJR, KJW June 2015 Suggested citation: Stroh, P.A., Pearman, D.P., Rumsey, F.J & Walker, K.J. 2015. Notes on identification works and some difficult and under-recorded taxa. Botanical Society of Britain and Ireland, Bristol. Front cover: Euphrasia pseudokerneri © F.J. Rumsey. 2 Identification works The standard flora for the Atlas 2020 project is edition 3 of C.A. Stace's New Flora of the British Isles (Cambridge University Press, 2010), from now on simply referred to in this guide as Stae; all recorders are urged to obtain a copy of this, although we suspect that many will already have a well-thumbed volume.