Brazil

Canary Islands Pine

Pinus canariensis

Cortadera blanca

Scleria gaertneri

Hazel sterculia

Sterculia foetida

creeping sensitive-plant

Mimosa invisa

Canary Island Dragon Tree

Dracaena draco

blackheart

Guianodendron praeclarum

Heath Star Moss

Campylopus introflexus

Hedge bamboo

Bambusa multiplex

Hedgemustard

Sisymbrium officinale

Sisal hemp

Agave sisalana

henequen

Agave fourcroydes

Hemp-leaf ragwort

Senecio brasiliensis

Herb of the cross

Verbena officinalis

Herb Robert

Geranium robertianum

Horsebush

Peltophorum dubium

Cucurbit Downy Mildew

Pseudoperonospora cubensis

Heyder's Pincushion Cactus

Mammillaria heyderi

Highland coffee

Coffea stenophylla

High mallow

Malva sylvestris

Hilograss

Paspalum conjugatum

Himalayan bamboo

Drepanostachyum falcatum

dancing ladies

Gomesa varicosa

Himalayan ginger

Hedychium gardnerianum

Hinoki false cypress

Chamaecyparis obtusa

Kumquat

Citrus japonica

Hispid starbur

Acanthospermum hispidum

hoary basil

Ocimum africanum

kaffir-lime

Citrus hystrix

Hollyhock

Alcea rosea

Hollyhock Rust

Puccinia malvacearum

Holly osmanthus

Osmanthus heterophyllus

Honduras mahogany

Swietenia macrophylla

Honey Box

Eucalyptus melliodora

Honeycomb Coral Slime Mold

Ceratiomyxa fruticulosa

honeyplant

Hoya carnosa

Honeyweed

Leonurus sibiricus

Honeyweed

Leonurus japonicus

Rockweed

Pilea microphylla

Torodinium teredo

hooded shrimp

Athanas nitescens

Horehound

Marrubium vulgare

Horned Pansy

Viola cornuta

Horned Pondweed

Zannichellia palustris

Annual yellow sweetclover

Melilotus indicus

Horseshoe geranium

Pelargonium zonale

Hottentot fig

Carpobrotus edulis

Kahili flower

Grevillea banksii

False aralia

Plerandra elegantissima

Imperial Crapet Grass

Axonopus scoparius

Hyacinthbean

Lablab purpureus

mother-of-hundreds

Mammillaria compressa

Elatior hybrid primroses

Primula polyantha

Illinois Pondweed

Potamogeton illinoensis

iguana hackberry

Celtis iguanaea

Elongated Sea Pearls

Valonia macrophysa

'Ihi

Oxalis corniculata

Pineland False Buttonweed

Spermacoce tetraquetra

ilima

Sida cordifolia

Cotton Morning Glory

Ipomoea cordatotriloba

Alligatorweed

Alternanthera philoxeroides