| African tuliptree |
Spathodea campanulata |
21 |
| African violet |
Saintpaulia spp. |
9 |
| African violet |
Saintpaulia teitensis |
13 |
| Allegheny monkeyflower |
Mimulus ringens |
1 |
| alpine besseya |
Besseya alpina |
21 |
| alpine sawsepal penstemon |
Penstemon glaber var. alpinus |
3 |
| American alpine speedwell |
Veronica wormskjoldii |
11 |
| American bluehearts |
Buchnera americana |
4 |
| American speedwell |
Veronica americana |
16 |
| American squawroot |
Conopholis americana |
18 |
| American waterwillow |
Justicia americana |
13 |
| Amur privet |
Ligustrum amurense |
1 |
| angelwing jasmine |
Jasminum nitidum |
1 |
| ash |
Fraxinus angustifolia ssp. oxycarpa |
35 |
| ash |
Fraxinus spp. |
29 |
| Asian mazus |
Mazus pumilus |
1 |
| beach false foxglove |
Agalinis fasciculata |
10 |
| bear's breech |
Acanthus mollis |
1 |
| beardlip penstemon |
Penstemon barbatus |
12 |
| beardtongues |
Penstemon spp. |
10 |
| beechdrops |
Epifagus virginiana |
5 |
| bellardia |
Bellardia trixago |
4 |
| Bengal trumpet |
Thunbergia grandiflora |
12 |
| black ash |
Fraxinus nigra |
19 |
| black poui |
Jacaranda mimosifolia |
9 |
| black senna |
Seymeria cassioides |
6 |
| blackeyed Susan vine |
Thunbergia alata |
8 |
| bladderwort |
Utricularia spp. |
5 |
| blue ash |
Fraxinus quadrangulata |
14 |
| blueflower butterwort |
Pinguicula caerulea |
28 |
| border privet |
Ligustrum obtusifolium |
81 |
| botellita |
Mitraria coccinea |
4 |
| bracted lousewort |
Pedicularis bracteosa |
6 |
| branched broomrape |
Orobanche ramosa |
20 |
| Brazilian red-cloak |
Megaskepasma erythrochlamys |
1 |
| brightblue speedwell |
Veronica serpyllifolia ssp. humifusa |
2 |
| Britton's wild petunia |
Ruellia simplex |
2 |
| broadbeard beardtongue |
Penstemon angustifolius |
2 |
| broomleaf toadflax |
Linaria genistifolia |
7 |
| Browne's blechum |
Blechum pyramidatum |
2 |
| bunchleaf penstemon |
Penstemon heterophyllus |
7 |
| bush penstemon |
Penstemon fruticosus |
2 |
| calabash tree |
Cresentia cujete |
1 |
| California privet |
Ligustrum ovalifolium |
20 |
| Canada toadflax |
Nuttallanthus canadensis |
9 |
| Canadian lousewort |
Pedicularis canadensis |
19 |
| Cape honeysuckle |
Tecoma capensis |
1 |
| capitate lousewort |
Pedicularis capitata |
6 |
| Caribbean trumpet-tree |
Tabebuia aurea |
15 |
| caricature-plant |
Graptophyllum pictum |
1 |
| Carolina ash |
Fraxinus caroliniana |
15 |
| catalpa |
Catalpa spp. |
4 |
| catclaw-vine |
Macfadyena unguis-cati |
24 |
| ceniza |
Leucophyllum frutescens |
2 |
| cenizo |
Leucophyllum laevigatum |
2 |
| Chinese catalpa |
Catalpa ovata |
1 |
| Chinese fringetree |
Chionanthus retusus |
21 |
| Chinese privet |
Ligustrum sinense |
128 |
| Chinese trumpet-creeper |
Campsis grandiflora |
14 |
| Chinese violet |
Asystasia gangetica |
13 |
| chitalpa |
x Chitalpa tashkentensis |
3 |
| clustered broomrape |
Orobanche fasciculata |
1 |
| Colorado beardtongue |
Penstemon auriberbis |
2 |
| combleaf yellow false foxglove |
Aureolaria pectinata |
2 |
| common butterwort |
Pinguicula vulgaris |
1 |
| common eyebright |
Euphrasia nemorosa |
1 |
| common lilac |
Syringa vulgaris |
15 |
| common mullein |
Verbascum thapsus |
127 |
| corn speedwell |
Veronica arvensis |
7 |
| cow-wheat |
Melampyrum lineare |
4 |
| Crandall's beardtongue |
Penstemon crandallii |
17 |
| Crandall's beardtongue |
Penstemon crandallii ssp. procumbens |
10 |
| crenate broomrape |
Orobanche crenata |
2 |
| crested Philippine violet |
Barleria cristata |
2 |
| crossvine |
Bignonia capreolata |
28 |
| Culver's root |
Veronicastrum virginicum |
3 |
| cyrtandra |
Cyrtandra spp. |
3 |
| Dalmatian toadflax |
Linaria dalmatica |
56 |
| dalmatian toadflax |
Linaria dalmatica ssp. dalmatica |
9 |
| dalmatian toadflax |
Linaria dalmatica ssp. macedonica |
1 |
| Davidson's penstemon |
Penstemon davidsonii |
3 |
| desert paintbrush |
Castilleja angustifolia dubia |
5 |
| desert willow |
Chilopsis linearis |
4 |
| devil's-claw |
Proboscidea louisianica |
17 |
| devilwood |
Osmanthus americanus |
32 |
| digitalis |
Digitalis spp. |
1 |
| Dwarf Korean lilac |
Syringa meyeri |
4 |
| dwarf lousewort |
Pedicularis centranthera |
2 |
| dwarf purple monkeyflower |
Mimulus nanus |
2 |
| early forsythia |
Forsythia ovata |
3 |
| Eaton penstemon |
Penstemon eatonii |
3 |
| Egyptian broomrape |
Orobanche aegyptiaca |
4 |
| elephanthead lousewort |
Pedicularis groenlandica |
33 |
| entireleaf Indian paintbrush |
Castilleja indivisa |
2 |
| estrellita |
Asteranthera ovata |
4 |
| European ash |
Fraxinus excelsior |
31 |
| European privet |
Ligustrum vulgare |
31 |
| false foxglove |
Agalinis spp. |
1 |
| fernleaf yellow false foxglove |
Aureolaria pedicularia |
6 |
| field Indian paintbrush |
Castilleja arvensis |
1 |
| field speedwell |
Veronica agrestis |
2 |
| finger speedwell |
Veronica triphyllos |
1 |
| flamevine |
Pyrostegia venusta |
7 |
| flaxleaf false foxglove |
Agalinis linifolia |
12 |
| floating bladderwort |
Utricularia inflata |
14 |
| Florida bluehearts |
Buchnera floridana |
8 |
| flowering ash |
Fraxinus ornus |
36 |
| forsythia |
Forsythia spp. |
4 |
| Fortune's osmanthus |
Osmanthus x fortunei |
2 |
| foxglove |
Digitalis purpurea |
15 |
| fringeleaf wild petunia |
Ruellia humilis |
4 |
| front range beardtongue |
Penstemon virens |
5 |
| Gairdner's beardtongue |
Penstemon gairdneri |
1 |
| germander beardtongue |
Penstemon teucrioides |
1 |
| germander speedwell |
Veronica chamaedrys |
4 |
| giant lousewort |
Pedicularis procera |
16 |
| giant red Indian paintbrush |
Castilleja miniata |
19 |
| giant yellow shrimp plant |
Barleria oenotheroides |
1 |
| globifera |
Micranthemum umbrosum |
16 |
| glossostigma |
Glossostigma spp. |
2 |
| glossy privet |
Ligustrum lucidum |
54 |
| Gold Coast jasmine |
Jasminum dichotomum |
3 |
| green ash |
Fraxinus pennsylvanica |
75 |
| greenstem forsythia |
Forsythia viridissima |
1 |
| hairy lousewort |
Pedicularis hirsuta |
2 |
| hairy purslane speedwell |
Veronica peregrina ssp. xalapensis |
1 |
| Hall's beardtongue |
Penstemon hallii |
1 |
| Harbour's beardtoungue |
Penstemon harbourii |
17 |
| harsh Indian paintbrush |
Castilleja hispida |
2 |
| Hawai'i olive |
Nestegis sandwicensis |
42 |
| Hayden's Indian paintbrush |
Castilleja haydenii |
1 |
| hophead Philippine violet |
Barleria lupulina |
10 |
| horned bladderwort |
Utricularia cornuta |
6 |
| humped bladderwort |
Utricularia gibba |
15 |
| Indian paintbrush |
Castilleja spp. |
10 |
| isoloma |
Isoloma spp. |
3 |
| ivyleaf speedwell |
Veronica hederifolia |
3 |
| James' beardtongue |
Penstemon jamesii |
17 |
| Japanese privet |
Ligustrum japonicum |
44 |
| Japanese tree lilac |
Syringa reticulata |
27 |
| jasmine |
Jasminum grandiflorum |
1 |
| jasmine |
Jasminum spp. |
10 |
| jazmin de trapo |
Jasminum fluminense |
9 |
| Kenilworth ivy |
Cymbalaria muralis |
4 |
| lady's slipper |
Calceolaria tenella |
1 |
| lagotis |
Lagotis integrifolia |
3 |
| lanceleaf figwort |
Scrophularia lanceolata |
11 |
| Langsdorf's lousewort |
Pedicularis langsdorffii |
7 |
| laurel clockvine |
Thunbergia laurifolia |
2 |
| leafy bladderwort |
Utricularia foliosa |
2 |
| licorice weed |
Scoparia dulcis |
1 |
| lilac |
Syringa spp. |
1 |
| lilac |
Syringa x hyacinthiflora |
7 |
| lilac |
Syringa x prestoniae |
1 |
| limestone wild petunia |
Ruellia strepens |
2 |
| limnophila |
Limnophila sessiliflora |
2 |
| little amphianthus |
Amphianthus pusillus |
10 |
| littleflower penstemon |
Penstemon procerus |
6 |
| lollipop-plant |
Pachystachys lutea |
1 |
| looseflower water-willow |
Justicia ovata var. lanceolata |
8 |
| lousewort |
Pedicularis spp. |
4 |
| Madagascar olive |
Noronhia emarginata |
1 |
| maiden blue eyed mary |
Collinsia parviflora |
5 |
| Manchurian lilac |
Syringa velutina |
4 |
| meadow lousewort |
Pedicularis crenulata |
23 |
| miramar weed |
Hygrophila polysperma |
2 |
| mohintli |
Justicia spicigera |
3 |
| monkeyflower |
Mimulus spp. |
3 |
| Monnier waterhyssop |
Bacopa monnieri |
10 |
| Moroccan toadflax |
Linaria maroccana |
8 |
| moth mullein |
Verbascum blattaria |
35 |
| mudmat |
Glossostigma cleistanthum |
39 |
| mullein |
Verbascum spp. |
7 |
| mullein foxglove |
Dasistoma macrophylla |
5 |
| muskflower |
Mimulus moschatus |
2 |
| naio |
Myoporum sandwicense |
34 |
| ngaio tree |
Myoporum laetum |
4 |
| nodding broomrape |
Orobanche cernua |
1 |
| northern catalpa |
Catalpa speciosa |
22 |
| oblongleaf snakeherb |
Dyschoriste oblongifolia |
24 |
| olive |
Olea europaea |
19 |
| Olympic mullein |
Verbascum olympicum |
1 |
| oneflowered broomrape |
Orobanche uniflora |
10 |
| oneside penstemon |
Penstemon unilateralis |
1 |
| Parry's lousewort |
Pedicularis parryi |
4 |
| paulownia |
Paulownia elongata |
1 |
| penstemon |
Penstemon ramaleyi |
10 |
| Persian lilac |
Syringa x persica |
6 |
| Persian Shield |
Strobilanthes dyerianus |
1 |
| Persian speedwell |
Veronica persica |
2 |
| Philippine violet |
Barleria spp. |
1 |
| pineneedle beardtongue |
Penstemon pinifolius |
5 |
| pink trumpet-tree |
Tabebuia rosea |
23 |
| pink turtlehead |
Chelone lyonii |
3 |
| polkadots |
Dyschoriste linearis |
2 |
| porcupine flower |
Barleria prionitis |
1 |
| primavera |
Tabebuia donnell-smithii |
1 |
| princesstree |
Paulownia tomentosa |
162 |
| privet |
Ligustrum spp. |
24 |
| purple bladderwort |
Utricularia purpurea |
4 |
| purple false foxglove |
Agalinis purpurea |
5 |
| purple monkeyflower |
Mimulus lewisii |
6 |
| purple toadflax |
Linaria purpurea |
2 |
| purple witchweed |
Striga hermonthica |
17 |
| purplestamen mullein |
Verbascum virgatum |
5 |
| purslane speedwell |
Veronica peregrina |
19 |
| Raup's Indian paintbrush |
Castilleja raupii |
2 |
| red turtlehead |
Chelone obliqua |
2 |
| redivy |
Hemigraphis alternata |
1 |
| redrattle |
Pedicularis flammea |
10 |
| Rocky Mountain penstemon |
Penstemon strictus |
21 |
| Rocky Mountain snowlover |
Chionophila jamesii |
7 |
| royal penstemon |
Penstemon speciosus |
3 |
| Rydberg's penstemon |
Penstemon rydbergii |
29 |
| sand lady's slipper |
Calceolaria uniflora |
1 |
| sausage tree |
Kigelia africana |
3 |
| scabland penstemon |
Penstemon deustus |
2 |
| scarlet Indian paintbrush |
Castilleja coccinea |
14 |
| seep monkeyflower |
Mimulus guttatus |
18 |
| sesame |
Sesamum indicum |
7 |
| sesamum |
Sesamum radiatum |
1 |
| shamel ash |
Fraxinus uhdei |
39 |
| sharppoint fluvellin |
Kickxia elatine |
4 |
| sharpsepal beardtongue |
Penstemon tenuis |
2 |
| sharpwing monkeyflower |
Mimulus alatus |
3 |
| showy forsythia |
Forsythia x intermedia |
5 |
| showy penstemon |
Penstemon spectabilis |
1 |
| shrimpplant |
Justicia brandegeeana |
1 |
| shrubby whitevein |
Sanchezia speciosa |
1 |
| sickletop lousewort |
Pedicularis racemosa |
10 |
| sidebells penstemon |
Penstemon secundiflorus |
3 |
| singleleaf ash |
Fraxinus anomala |
2 |
| small broomrape |
Orobanche minor |
46 |
| small butterwort |
Pinguicula pumila |
22 |
| smooth yellow false foxglove |
Aureolaria flava var. flava |
15 |
| southern bladderwort |
Utricularia juncea |
2 |
| southern catalpa |
Catalpa bignonioides |
47 |
| speedwell |
Veronica cinerea |
1 |
| speedwell |
Veronica spp. |
11 |
| splitleaf Indian paintbrush |
Castilleja rhexiifolia |
18 |
| spring blue eyed Mary |
Collinsia verna |
4 |
| squirrel's tail |
Justicia betonica |
3 |
| stretchberry |
Forestiera pubescens |
13 |
| striped bladderwort |
Utricularia striata |
1 |
| sudetic lousewort |
Pedicularis sudetica |
19 |
| sudetic lousewort |
Pedicularis sudetica ssp. scopulorum |
1 |
| sulphur Indian paintbrush |
Castilleja sulphurea |
11 |
| sunflower broomrape |
Orobanche cumana |
1 |
| swamp lousewort |
Pedicularis lanceolata |
5 |
| sweet osmanthus |
Osmanthus fragrans |
1 |
| Texas toadflax |
Nuttallanthus texanus |
17 |
| thymeleaf speedwell |
Veronica serpyllifolia |
31 |
| tiger beardtongue |
Penstemon mensarum |
28 |
| toadflax |
Linaria spp. |
8 |
| toadflax |
Nuttallanthus spp. |
28 |
| toadflax penstemon |
Penstemon linarioides |
1 |
| trumpet vine |
Campsis x tagliabuana |
3 |
| trumpet-tree |
Tabebuia spp. |
1 |
| trumpetbush |
Tecoma spp. |
1 |
| trumpetcreeper |
Campsis radicans |
79 |
| trumpetflower |
Tecoma stans |
3 |
| twolobe speedwell |
Veronica biloba |
3 |
| velvet ash |
Fraxinus velutina |
1 |
| Venus penstemon |
Penstemon venustus |
1 |
| vicary privet |
Ligustrum x vicaryi |
1 |
| Wasatch beardtongue |
Penstemon cyananthus |
3 |
| water mudwort |
Limosella aquatica |
11 |
| water speedwell |
Veronica anagallis-aquatica |
20 |
| wavyleaf Indian paintbrush |
Castilleja applegatei |
2 |
| wayside speedwell |
Veronica polita |
9 |
| weaselsnout |
Lagotis glauca |
2 |
| western Indian paintbrush |
Castilleja occidentalis |
14 |
| Whipple's penstemon |
Penstemon whippleanus |
27 |
| white ash |
Fraxinus americana |
28 |
| white forsythia |
Abeliophyllum distichum |
1 |
| white forsythia |
Abeliophyllum spp. |
1 |
| white fringetree |
Chionanthus virginicus |
34 |
| White River coraldrops |
Besseya plantaginea |
1 |
| white turtlehead |
Chelone glabra |
9 |
| white wand beardtongue |
Penstemon tubiflorus |
3 |
| wholeleaf Indian paintbrush |
Castilleja integra |
4 |
| wild petunia |
Ruellia caroliniensis |
7 |
| witchweed |
Striga asiatica |
7 |
| witchweed |
Striga spp. |
17 |
| wonga wonga vine |
Pandorea pandorana |
1 |
| wood speedwell |
Veronica montana |
1 |
| Wyoming Indian paintbrush |
Castilleja linariifolia |
31 |
| yellow butterwort |
Pinguicula lutea |
7 |
| yellow glandweed |
Parentucellia viscosa |
10 |
| yellow owl's-clover |
Orthocarpus luteus |
8 |
| yellow toadflax |
Linaria vulgaris |
70 |
| yellow unicorn-plant |
Ibicella lutea |
15 |
| yerba de hicotea |
Hygrophila costata |
9 |
| Zebra Plant |
Aphelandra squarrosa |
1 |
