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Criteria:   found in Lassen County  •   is not native  •  group by lifeform
362  records include photos for these plants # number of sources
Scientific Name Common Name Lifeform #
  Lifeform: Annual180 plants
Adonis aestivalis Summer pheasant's eye Annual herb 1
Aegilops cylindrica ! Jointed goatgrass Annual grass  
Aegilops triuncialis ! Goatgrass Annual grass  
Agrostis hyemalis Winter bentgrass Annual grass 4
Alyssum desertorum Desert alyssum Annual herb  
Alyssum minus ssp. micranthum European alyssum Annual herb  
Alyssum simplex Alyssum Annual herb  
Amaranthus albus Tumbleweed Annual herb  
Amaranthus deflexus Large fruited amaranth Annual herb  
Ambrosia artemisiifolia Annual ragweed Annual herb  
Ambrosia trifida ! Giant ragweed Annual herb  
Anthemis cotula Dog fennel Annual herb  
Apera interrupta Dense silky bent Annual grass  
Arabidopsis thaliana Arabidopsis Annual herb  
Arenaria serpyllifolia Thymeleaf sandwort Annual herb  
Arenaria serpyllifolia ssp. serpyllifolia Thyme leaf sandwort Annual herb  
Arenaria serpyllifolia var. serpyllifolia Thymeleaf sandwort Annual herb  
Artemisia biennis Biennial sagewort Annual, Perennial herb  
Asperugo procumbens Madwort Annual herb  
Astragalus spaldingii Spalding's milkvetch Annual herb  
Atriplex heterosperma Two scale saltbush Annual herb  
Atriplex hortensis Garden orache Annual herb  
Atriplex micrantha Twoscale saltbush Annual herb  
Atriplex prostrata Fat-hen Annual herb 1
Atriplex rosea Redscale Annual herb  
Atriplex triangularis Spearscale Annual herb 1
Avena barbata ! Slim oat Annual grass  
Avena fatua ! Wildoats Annual grass 2
Avena sativa Wild oat Annual, Perennial grass 7
Bassia hyssopifolia ! Fivehorn smotherweed Annual herb  
Berteroa incana ! Hoary alyssum Annual herb  
Briza maxima ! Rattlesnake grass Annual grass 3
Bromus briziformis Rattlesnake brome Annual grass  
Bromus commutatus Hairy chess, meadow brome Annual grass  
Bromus diandrus ! Ripgut brome Annual grass  
Bromus hordeaceus ! Soft chess Annual grass 4
Bromus japonicus ! Hairy chess Annual grass  
Bromus madritensis Foxtail chess, foxtail brome Annual grass  
Bromus madritensis ssp. rubens ! Foxtail brome Annual grass 2
Bromus racemosus Smooth brome Annual grass  
Bromus rubens ! Red brome Annual grass 2
Bromus secalinus Rye brome Annual grass  
Bromus sterilis Sterile brome Annual grass  
Bromus tectorum ! Downy chess Annual grass  
Camelina microcarpa False flax Annual herb 1
Camelina sativa ssp. sativa Gold-of-pleasure Annual herb  
Capsella bursa-pastoris Shepherd's purse Annual herb 1
Cenchrus incertus Coast sandbur Annual grass  
Cenchrus longispinus ! Mat sandbur Annual grass  
Centaurea calcitrapa ! Purple star thistle Annual, Perennial herb  
Centaurea cyanus Bachelor's button Annual herb 7
Centaurea solstitialis ! Yellow starthistle Annual herb  
Centaurium tenuiflorum Slender centaury Annual herb 1
Cerastium glomeratum Large mouse ears Annual herb  
Chamaesyce maculata Spotted spurge Annual herb  
Chamaesyce nutans Large spurge Annual herb  
Chenopodium album Lambs quarters Annual herb  
Chenopodium ambrosioides Mexican tea Annual, Perennial herb 3
Chenopodium ambrosioides var. suffruticosum Wormseed Annual, Perennial herb  
Chenopodium botrys Jerusalem oak goosefoot Annual herb  
Chenopodium chenopodioides Goosefoot Annual herb  
Chenopodium pumilio Tasmanian goosefoot Annual herb  
Chenopodium rubrum var. humile Red goosefoot Annual herb  
Chorispora tenella Crossflower Annual herb  
Conringia orientalis Hare's ear mustard Annual herb  
Consolida ajacis Doubtful knight's spur Annual herb 6
Consolida ambigua Doubtful knight's spur Annual herb 1
Crypsis schoenoides Swamp grass Annual grass  
Crypsis vaginiflora African prickle grass Annual grass  
Cuscuta approximata Alfalfa dodder Annual herb, Vine (parasitic)  
Descurainia sophia ! Herb sophia Annual herb  
Draba verna Whitlow grass Annual herb  
Dysphania ambrosioides Mexican tea Annual, Perennial herb 3
Dysphania botrys Jerusalem oak goosefoot Annual herb  
Dysphania pumilio Tasmanian goosefoot Annual herb  
Echinochloa crus-galli Barnyard grass Annual grass  
Elymus caput-medusae ! Medusa head Annual grass  
Eragrostis cilianensis Stinkgrass Annual grass  
Erodium cicutarium ! Coastal heron's bill Annual herb 4
Erysimum repandum Spreading wallflower Annual herb  
Euclidium syriacum Syrian mustard Annual herb  
Euphorbia maculata Spotted spurge Annual herb  
Fallopia convolvulus Black bindweed Annual herb  
Festuca bromoides Brome fescue Annual grass  
Festuca myuros ! Rattail sixweeks grass Annual grass 4
Festuca perennis ! Italian rye grass Annual, Perennial grass 7
Festuca temulenta Darnel, tares Annual grass  
Filago pyramidata Broadleaf cottonrose Annual herb  
Gaillardia pulchella Firewheel indian blanket Annual herb 8
Galium spurium Sticky willy Annual herb  
Geranium dissectum ! Wild geranium Annual herb  
Geranium pusillum Small flowered geranium Annual herb  
Halogeton glomeratus ! Halogeton Annual herb  
Holosteum umbellatum Jagged chickweed Annual herb  
Holosteum umbellatum ssp. umbellatum Jagged chickweed Annual herb  
Hordeum marinum Seaside barley Annual grass  
Hordeum marinum ssp. gussoneanum ! Barley Annual grass  
Hordeum murinum ! Foxtail barley Annual grass  
Hordeum murinum ssp. glaucum Foxtail Annual grass  
Hordeum murinum ssp. leporinum Farmer's foxtail Annual grass  
Kochia scoparia ! Summer cypress Annual herb  
Lactuca saligna Willow lettuce Annual herb  
Lactuca serriola Prickly lettuce Annual herb  
Lamium amplexicaule Henbit Annual herb  
Lepidium campestre Field pepper grass Annual, Perennial herb  
Lepidium chalepense ! Lens-podded hoary cress Annual, Perennial herb  
Lepidium perfoliatum Klamath pepper grass Annual herb  
Lepidium virginicum var. virginicum Wild pepper grass Annual herb  
Lithospermum arvense Gromwell Annual herb  
Lolium multiflorum Italian rye grass Annual, Biennial grass 6
Lolium temulentum Darnel Annual grass  
Lythrum hyssopifolia ! Hyssop loosestrife Annual, Perennial herb  
Lythrum hyssopifolium Hyssop loosestrife Annual, Perennial herb  
Lythrum portula Broad leaved loosestrife Annual herb  
Lythrum tribracteatum Three bracted loosestrife Annual herb  
Malva neglecta Dwarf mallow Annual, Perennial herb  
Malva nicaeensis Bull mallow Annual herb  
Medicago lupulina Black medick Annual, Perennial herb  
Medicago polymorpha ! California burclover Annual herb  
Melilotus alba Sweetclover Annual, Biennial herb 2
Melilotus albus White sweetclover Annual, Biennial herb 2
Melilotus indicus Annual yellow sweetclover Annual herb  
Melilotus officinalis Yellow sweetclover Annual, Biennial herb 2
Myosotis discolor Forget me not Annual herb  
Myosotis micrantha Small flowered forget me not Annual herb  
Nicotiana acuminata Manyflower tobacco Annual herb  
Nicotiana acuminata var. multiflora Many flowered tobacco Annual herb  
Panicum capillare ssp. hillmanii Hillman's panicgrass Annual grass  
Panicum dichotomiflorum Smooth witchgrass Annual grass  
Panicum hillmanii Hillman's panicgrass Annual grass  
Persicaria maculosa Spotted ladysthumb Annual herb  
Polycarpon tetraphyllum Four leaved allseed Annual herb  
Polygonum arenastrum Common knotweed Annual, Perennial herb  
Polygonum argyrocoleon Silver sheath knotweed Annual herb  
Polygonum aviculare Prostrate knotweed Annual, Perennial herb  
Polygonum aviculare ssp. buxiforme Prostrate knotweed Annual, Perennial herb  
Polygonum aviculare ssp. depressum Prostrate knotweed Annual, Perennial herb  
Polygonum aviculare ssp. neglectum Prostrate knotweed Annual, Perennial herb  
Polygonum buxiforme Box knotweed Annual, Perennial herb  
Polygonum convolvulus Black bindweed Annual herb  
Polygonum patulum Bellard's smartweed Annual herb  
Polygonum persicaria Lady's thumb Annual herb  
Polygonum ramosissimum Yellow knotweed Annual herb  
Polypogon monspeliensis ! Annual beard grass Annual grass 2
Portulaca oleracea Common purslane Annual herb 1
Ranunculus arvensis Field buttercup Annual herb  
Ranunculus testiculatus Tubercled crowfoot Annual herb  
Raphanus sativus ! Jointed charlock Annual, Biennial herb  
Rorippa curvisiliqua var. lyrata Lyrateleaf yellowcress Annual, Perennial herb  
Salsola gobicola Barbwire russian thistle Annual, Perennial herb  
Salsola kali Russian thistle Annual herb  
Salsola paulsenii ! Paulsen's russian thistle Annual, Perennial herb  
Salsola tragus ! Russian thistle Annual herb  
Schizachne purpurascens False melic Annual grass  
Secale cereale Rye Annual grass 3
Setaria verticillata Hooked bristlegrass Annual grass  
Setaria viridis Green foxtail Annual grass  
Sisymbrium altissimum Tumble mustard Annual herb  
Sisymbrium orientale Indian hedge mustard Annual, Perennial herb  
Solanum physalifolium var. nitidibaccatum Nightshade Annual herb  
Solanum rostratum Buffalo berry Annual herb  
Solanum triflorum Three flowered nightshade Annual herb  
Sonchus asper Spiny sowthistle Annual herb  
Sonchus asper ssp. asper Sow thistle Annual herb  
Spergularia diandra Alkali sandspurry Annual, Perennial herb  
Spergularia rubra Purple sand spurry Annual, Perennial herb  
Taeniatherum caput-medusae Medusa head Annual grass  
Thlaspi arvense Fan weed Annual herb  
Tribulus terrestris ! Puncture vine Annual herb  
Triticum aestivum Common wheat Annual grass 5
Vaccaria hispanica Spanish cockle Annual herb 2
Ventenata dubia ! Ventenata grass Annual grass  
Veronica arvensis Speedwell Annual herb  
Vicia villosa Hairy vetch Annual herb, Vine 3
Vicia villosa ssp. villosa Hairy vetch Annual herb, Vine  
Vulpia bromoides Six weeks fescue Annual grass  
Vulpia myuros Rattail fescue Annual grass 3
Vulpia myuros var. hirsuta Fox tail fescue Annual grass 3
Vulpia myuros var. myuros Six weeks fescue Annual grass 2
Xanthium spinosum Spiny cocklebur Annual herb  
  Lifeform: Biennial2 plants
  Lifeform: Perennial149 plants
  Lifeform: Fern1 plant
  Lifeform: Shrub19 plants
Betula papyrifera Paper birch Shrub 22
Cercis canadensis Eastern redbud Tree, Shrub 66
Cytisus scoparius ! Scotch broom Shrub 1
Elaeagnus angustifolia ! Russian olive Tree, Shrub 2
Holodiscus dumosus Rockspirea Shrub 40
Juniperus monosperma Oneseed juniper Shrub 2
Lycium barbarum Matrimony vine Shrub 1
Penstemon venustus Venus penstemon Shrub (stem succulent) 3
Rubus armeniacus ! Himalayan blackberry Shrub  
Rubus discolor Blackberry Shrub  
Rubus laciniatus Cut leaved blackberry Shrub  
Senecio lugens Small blacktip ragwort Shrub  
Senecio sphaerocephalus Ballhead ragwort Shrub  
Solanum dulcamara Bittersweet Vine, Shrub 1
Solanum physalifolium Hoe nightshade Shrub  
Solanum villosum Hairy nightshade Shrub  
Symphoricarpos oreophilus var. oreophilus Mountain snowberry Shrub  
Tamarix parviflora Tamarisk Tree, Shrub  
Tamarix ramosissima ! Tamarisk Tree, Shrub  
  Lifeform: Tree9 plants
 
Pink background indicates a plant is non-native.
! indicates a plant is potentially invasive.
NB: found in Lassen County is intended to indicate only plants found growing in the wild. However, the evidence is not always clear, and may occasionally include plants found in cultivation. To verify the wild presence of any particular plant in the list above, please click through to Calflora and look closely at the observations in this county.