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| habanero also called scotch bonnet, bonnet pepper, rocotillo, capsicum chinense |
| haematococcus |
| haematococcus pluvialis |
| hairy vetch |
| hard pines also called diploxylon pines, pinus |
| hawthorn |
| hazelnuts |
| heath family also called ericaceae, empetraceae, epacridaceae, monotropaceae, pyrolaceae |
| heather flower |
| hebe |
| helenium |
| helianthus |
| helianthus annuus also called common sunflower, helianthus annuus8 |
| helianthus annuus8 also called common sunflower, helianthus annuus |
| helianthus sp. |
| helianthus tuberosus |
| heliosperma also called campions, silene, cucubalus, lychnis, steris, uebelinia, viscaria |
| helleborus |
| hemidesmus |
| hemidesmus indicus |
| hemlocks |
| hemp also called marijuana, cannabis sativa |
| henbane |
| hepatica |
| hepaticae also called liverworts, hepatics, marchantiophyta, liverworts, bryophytes, hepaticopsida |
| hepaticopsida also called liverworts, hepatics, marchantiophyta, liverworts, bryophytes, hepaticae |
| hepatics also called liverworts, marchantiophyta, liverworts, bryophytes, hepaticae, hepaticopsida |
| heracleum |
| herb gerard also called goutweed, aegopodium podagraria, bishop's weed |
| hevea |
| hevea brasiliensis also called para rubber tree, jebe, rubbertree, siringa |
| hibiscus |
| hibiscus sabdariffa also called red-sorrel, roselle, sereni |
| higher plants also called land plants, plants, embryophyta, land plants |
| hippeastrum |
| hoffmannia refulgens |
| holcus lanatus |
| honesty also called moneyplant, lunaria annua |
| honeysuckle |
| hong shen also called chinese ginseng, korean ginseng, ginseng, insam, ninjin, ren seng, panax ginseng |
| hora papua also called tuba, derris trifoliata |
| hordeum |
| hordeum distichon also called barley, two-rowed barley, hordeum vulgare subsp. vulgare, hordeum distichum, hordeum vulgare distichum, hordeum vulgare var. distichum |
| hordeum distichum also called barley, two-rowed barley, hordeum vulgare subsp. vulgare, hordeum distichon, hordeum vulgare distichum, hordeum vulgare var. distichum |
| hordeum sp. |
| hordeum spontaneum also called wild barley, hordeum vulgare subsp. spontaneum |
| hordeum vulgare |
| hordeum vulgare distichum also called barley, two-rowed barley, hordeum vulgare subsp. vulgare, hordeum distichon, hordeum distichum, hordeum vulgare var. distichum |
| hordeum vulgare subsp. spontaneum also called wild barley, hordeum spontaneum |
| hordeum vulgare subsp. vulgare also called barley, two-rowed barley, hordeum distichon, hordeum distichum, hordeum vulgare distichum, hordeum vulgare var. distichum |
| hordeum vulgare var. distichum also called barley, two-rowed barley, hordeum vulgare subsp. vulgare, hordeum distichon, hordeum distichum, hordeum vulgare distichum |
| horminum |
| horse bean also called jack bean, canavalia ensiformis |
| horse gram |
| horseradish also called armoracia rusticana, armoracia lapathifolia, armoracia laphatifolia |
| horseradish tree also called maranga, moringa oleifera, moringa pterygosperma |
| hosta |
| hot pepper also called chili pepper, capsicum frutescens |
| house geranium also called bedding geranium, geranium, zonal geranium, zonal pelargonium, pelargonium x hortorum, pelargonium hortorum, pelargonium inquinans x pelargonium zonale |
| hoya |
| hua |
| humulus |
| huperzia |
| hydrangea |
| hydrilla |
| hydrilla verticillata |
| hylandra suecica also called arabidopsis suecica, arabis suecica, cardaminopsis suecica |
| hylotelephium telephium also called live-forever, orpine, sedum telephium |
| hymenolepis |
| hyoscyamus muticus |
| hyoscyamus niger |
| hypericum |
| hypericum perforatum |
| hypoestes |
| hypoxis |
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