Hay fever pollen
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Hay fever pollen

1 Abies concolor
ABIETACEAE		 white fir
Colorado fir		 May 01 - Jun 30 Light
2 Abies nobilis
ABIETACEAE		 noble fir Jun 01 - Jul 31 Light
3 Acacia baileyana
ACACIACEAE		 cootamundra wattle
Bailey's acacia		 Mar 01 - May 31 Light
4 Acacia decurrens
ACACIACEAE		 acacia Mar 01 - May 31 Light
5 Acacia longifolia
ACACIACEAE		 Sydney golden wattle
longleaf acacia		 Mar 01 - May 31 Light
6 Acer macrophyllum
ACERACEAE		 bigleaf maple
coast maple
canyon maple		 Apr 01 - May 31 Light
7 Acer negundo
ACERACEAE		 ash-leaved boxelder Mar 01 - May 31 Light
8 Acer rubrum
ACERACEAE		 red maple Mar 01 - Apr 30 Light
9 Acer saccharinum
ACERACEAE		 silver maple
soft maple
white maple		 Mar 01 - Apr 30 Light
10 Acer saccharum
ACERACEAE		 sugar maple
rock maple		 Apr 01 - May 31 Light
11 Acnida tamariscina
AMARANTHACEAE		 water hemp Aug 01 - Sep 30 Strong
12 Adenostoma fasciculatum
ROSACEAE		 chamise
greasewood		 May 01 - Jun 30 Light
13 Aesculus hippocastanum
AESCULACEAE		 horse-chestnut May 01 - Jun 30 Light
14 Agropyron cristatum
GRAMINEAE		 crested wheatgrass Jun 01 - Aug 31 Strong
15 Agropyron repens
GRAMINEAE		 quack grass
couch grass		 Jun 01 - Aug 31 Light
16 Agropyron smithii
GRAMINEAE		 western wheatgrass Jun 01 - Aug 31 Strong
17 Agropyron spicatum
GRAMINEAE		 northwest bunchgrass Jun 01 - Aug 31 Light
18 Agropyron tenerum
GRAMINEAE		 slender wheatgrass Jun 01 - Aug 31 Strong
19 Agrostis alba
AGROSTIDACEAE		 redtop Jun 01 - Sep 30 Strong
20 Agrostis maritima
AGROSTIDACEAE		 bentgrass Jun 01 - Sep 30 Strong
21 Ailanthus altissima
AILANTHACEAE		 tree of heaven
chun pi		 Jun 01 - Jun 30 Light
22 Allenrolfea occidentalis
CHENOPODIACEAE		 Iodine bush Jun 01 - Aug 31 Light
23 Alnus incana
 tag alder
speckled alder
or		 Mar 01 - May 31 Strong
24 Alnus rhombifolia
 white alder Jan 01 - Apr 30 Light
25 Alnus rubra
 red alder
Oregon alder		 Mar 01 - Apr 30 Strong
26 Alnus sinuata
 Sitka alder May 01 - Jul 31 Strong
27 Alnus tenuifolia
 slender alder
alder
mountain ash
mountain alder		 Mar 01 - May 31 Strong
28 Amaranthus blitoides
AMARANTHACEAE		 mat amaranth
spreading pigweed		 Jul 01 - Nov 30 Light
29 Amaranthus hybridus
AMARANTHACEAE		 green pigweed Jun 01 - Nov 30 Light
30 Amaranthus palmeri
AMARANTHACEAE		 carelessweed Aug 01 - Nov 30 Strong
31 Amaranthus retroflexus
AMARANTHACEAE		 redwood pigweed Jun 01 - Nov 30 Strong
32 Amaranthus spinosus
AMARANTHACEAE		 spiny amaranth
spiny pigweed
amaranth		 Jun 01 - Sep 30 Light
33 Ambrosia artemisiifolia
AMBROSIACEAE		 short ragweed Aug 01 - Oct 31 Strong
34 Ambrosia bidentata
AMBROSIACEAE		 lanceleaf ragweed
southern ragweed		 Aug 01 - Sep 30 Strong
35 Ambrosia psilostachya
AMBROSIACEAE		 western ragweed Jul 01 - Nov 30 Strong
36 Ambrosia trifida
AMBROSIACEAE		 crownweed
giant ragweed		 Jul 01 - Sep 30 Strong
37 Anthemis cotula
ANTHEMIDACEAE		 stinking chamomile
dog fennel
mayweed
cotula fetida
stinking mayweed
pigsty daisy		 Jun 01 - Oct 31 Light
38 Anthoxanthum odoratum
ANTHOXANTHACEAE		 sweet vernalgrass Apr 01 - Jul 31 Strong
39 Antirrhinum majus
ANTIRRHINACEAE		 snapdragon Jan 01 - Dec 31 Light
40 Arrhenatherum elatius
GRAMINEAE		 tall oat grass May 01 - Jul 31 Light
41 Artemisia absinthium
ARTEMISIACEAE		 wormwood
absinthe		 Jul 01 - Sep 30 Light
42 Artemisia annua
ARTEMISIACEAE		 sweet sagewort
annual sagebrush
Chinese wormwood
qing hao		 Jul 01 - Sep 30 Light
43 Artemisia biennis
ARTEMISIACEAE		 biennial sagebrush Aug 01 - Sep 30 Light
44 Artemisia californica
ARTEMISIACEAE		 California sage brush Aug 01 - Dec 31 Strong
45 Artemisia douglasiana
ARTEMISIACEAE		 Douglas' sagewort
mugwort		 Jun 01 - Oct 31 Strong
46 Artemisia dracunculus
ARTEMISIACEAE		 tarragon
green sagebrush		 Aug 01 - Oct 31 Light
47 Artemisia frigida
ARTEMISIACEAE		 prairie sagewort
carpet sagebrush		 Jul 01 - Sep 30 Strong
48 Artemisia heterophylla
ARTEMISIACEAE		 mugwort Jun 01 - Oct 31 Strong
49 Artemisia ludoviciana
ARTEMISIACEAE		 prairie sagebrush
western sage		 Jul 01 - Sep 30 Strong
50 Artemisia pycnocephala
ARTEMISIACEAE		 beach wormwood
sand dune sagebrush		 Jun 01 - Aug 31 Light
51 Artemisia suksdorfii
ARTEMISIACEAE		 coastal wormwood
sukasdorf sagebrush		 May 01 - Aug 31 Light
52 Artemisia tridentata
ARTEMISIACEAE		 giant sagebrush Aug 01 - Oct 31 Strong
53 Aster spp.
COMPOSITAE		 aster Jan 01 - Dec 31 Light
54 Atriplex argentea
ATRIPLICACEAE		 silverscale Jun 01 - Sep 30 Light
55 Atriplex bracteosa
ATRIPLICACEAE		 bractscale Jul 01 - Nov 30 Strong
56 Atriplex breweri
ATRIPLICACEAE		 brewers scale Jul 01 - Oct 31 Strong
57 Atriplex canescens
ATRIPLICACEAE		 wingscale
shadescale
chamizo
diwozhiibaih		 Jun 01 - Aug 31 Strong
58 Atriplex confertifolia
ATRIPLICACEAE		 shadscale saltbush Apr 01 - Jul 31 Light
59 Atriplex lentiformis
ATRIPLICACEAE		 lenscale Aug 01 - Oct 31 Strong
60 Atriplex patula
ATRIPLICACEAE		 spearscale Jun 01 - Nov 30 Light
61 Atriplex polycarpa
ATRIPLICACEAE		 cattle saltbush
allscale		 Jul 01 - Oct 31 Strong
62 Atriplex rosea
ATRIPLICACEAE		 tumbling saltweed
redscale		 Jul 01 - Oct 31 Light
63 Avena barbata
AVENACEAE		 slender wild oats May 01 - Jun 30 Light
64 Avena fatua
AVENACEAE		 wild oats Mar 01 - Sep 30 Light
65 Avena sativa
AVENACEAE		 oat May 01 - Aug 31 Light
66 Balsamorhiza sagittata
COMPOSITAE		 arrowleaf balsamroot
Oregon sunflower		 Apr 01 - Jul 31 Light
67 Bassia hyssopifolia
CHENOPODIACEAE		 fivehorn smotherweed
bassia		 Jul 01 - Oct 31 Light
68 Beta vulgaris
BETACEAE		 beetroot
white beet		 Jul 01 - Oct 31 Light
69 Betula fontinalis
BETULACEAE		 spring birch Feb 01 - Jun 30 Light
70 Betula lenta
BETULACEAE		 cherry birch
black birch
sweet birch		 Mar 01 - May 31 Light
71 Betula lutea
BETULACEAE		 yellow birch Mar 01 - May 31 Light
72 Betula nigra
BETULACEAE		 river birch Feb 01 - Jun 30 Light
73 Betula papyrifera
BETULACEAE		 paperbark birch
white birch		 Mar 01 - May 31 Light
74 Betula pendula var. alba
BETULACEAE		 European birch
white birch		 Jan 01 - May 31 Light
75 Bouteloua spp.
GRAMINEAE		 grama grass Jun 01 - Oct 31 Light
76 Brassica campestris
CRUCIFERAE		 field mustard
broccoli raab
turnip broccoli		 Jan 01 - May 31 Light
77 Brassica nigra
CRUCIFERAE		 black mustard Apr 01 - Jul 31 Light
78 Bromus carinatus
 California brome Apr 01 - Aug 31 Light
79 Bromus hordeaceus
 cheat grass
soft brome		 May 01 - Jul 31 Light
80 Bromus inermis
 smooth brome Jun 01 - Aug 31 Light
81 Bromus marginatus
 mountain brome Apr 01 - Jul 31 Light
82 Bromus rigidus
 rigput Apr 01 - Jun 30 Light
83 Bromus secalinus
 cheat
chess		 Jun 01 - Jul 31 Light
84 Bromus unioloides
 rescue grass
southern chess		 Jun 01 - Sep 30 Light
85 Broussonetia papyrifera
MORACEAE		 paper mulberry Jan 01 - Apr 30 Light
86 Calistemon spp.
 bottlebrush Jan 01 - Dec 31 Light
87 Cannabis sativa
CANNABACEAE		 hemp
huo ma ren
marijuana		 Jul 01 - Sep 30 Light
88 Carex spp.
CARICACEAE		 sedge Mar 01 - Aug 31 Light
89 Carpinus caroliniana
CARPINACEAE		 American hornbeam Mar 01 - May 31 Light
90 Carya laciniosa
JUGLANDACEAE		 shellbark hickory May 01 - Jun 30 Light
91 Carya ovata
JUGLANDACEAE		 shagbark hickory May 01 - Jun 30 Light
92 Carya pecan
JUGLANDACEAE		 pecan Mar 01 - May 31 Light
93 Carya tomentosa
JUGLANDACEAE		 white hickory
mockernut		 May 01 - Jun 30 Light
94 Castanea dentata
CASTANEACEAE		 American chestnut Mar 01 - May 31 Light
95 Casuarina equisetifolia
CASUARINACEAE		 beach sheoak
beefwood
Australian pine		 Jan 01 - Mar 31 Light
96 Cedrus atlantica
CEDRACEAE		 Atlantic cedar Dec 01 - Feb 28 Light
97 Cedrus deodara
CEDRACEAE		 Deodar cedar Dec 01 - Feb 28 Light
98 Celtis occidentalis
CELTIDACEAE		 hackberry Mar 01 - May 31 Light
99 Ceratonia siliqua
CERATONIACEAE		 St. John's bread
carob		 Feb 01 - Mar 31 Light
100 Cercidium torreyana
LEGUMINOSAE		 palo verde Mar 01 - May 31 Light
101 Chamaerops humilis
PALMAE		 European fan palm
dwarf palm		 Mar 01 - May 31 Light
102 Chenopodium album
CHENOPODIACEAE		 goosefoot
lamb's quarters		 Jun 01 - Oct 31 Strong
103 Chenopodium ambrosioides
CHENOPODIACEAE		 epazote
Mexican tea
wormseed
American wormseed		 Jun 01 - Dec 31 Light
104 Chenopodium botrys
CHENOPODIACEAE		 Jerusalem oak goosefoot
feather geranium		 Jun 01 - Oct 31 Light
105 Chenopodium murale
CHENOPODIACEAE		 nettleleaf goosefoot Mar 01 - Jun 30 Light
106 Chrysanthemum leucanthemum
 ox-eye daisy Jun 01 - Aug 31 Light
107 Chrysothamnus nauseosus
COMPOSITAE		 rabbitbrush Jul 01 - Oct 31 Light
108 Cocos plumosa
COCOSACEAE		 queen palm Mar 01 - May 31 Light
109 Cortaderia selloana
GRAMINEAE		 Uruguayan pampas grass Jun 01 - Sep 30 Light
110 Corylus americana
CORYLACEAE		 American hazelnut
American filbert		 Jan 01 - Apr 30 Light
111 Corylus cornuta
CORYLACEAE		 beaked hazelnut Jan 01 - Apr 30 Light
112 Cryptomeria japonica
CRYPTOMERIACEAE		 Japanese cedar
cryptomeria		 Mar 01 - May 31 Light
113 Cupressus arizonica
CUPRESSACEAE		 Arizona cypress Mar 01 - Apr 30 Light
114 Cupressus macrocarpa
CUPRESSACEAE		 Monterey cypress Mar 01 - May 31 Light
115 Cupressus sempervirens
CUPRESSACEAE		 Italian cypress Feb 01 - Mar 31 Light
116 Cynodon dactylon
 Bermudagrass Jun 01 - Sep 30 Strong
117 Cytisus scoparius
 scotch broom Apr 01 - Jun 30 Light

Last reviewed November 01, 2004   

 

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