Outdoor Plants

Mealy tooth

Hydnellum ferrugineum

Hard

Climbing hydrangea

Hydrangea anomala

Smooth Hydrangea

Hydrangea arborescens

Bigleaf Hydrangea

Hydrangea macrophylla

Panicle Hydrangea

Hydrangea paniculata

Mountain Hydrangea

Hydrangea serrata

Marsh pennywort

Hydrocotyle vulgaris

Persistent Waxcap

Hygrocybe acutoconica

Hard

Red Pitaya

Hylocereus costaricensis

Dragon Fruit

Hylocereus undatus

Mountain fern moss

Hylocomium splendens

Autumn Joy Sedum

Hylotelephium

Great Stonecrop

Hylotelephium maximum

Showy Stonecrop

Hylotelephium spectabile

Orpine

Hylotelephium telephium

Spider Lily

Hymenocallis

Beach Spider Lily

Hymenocallis littoralis

Rooting Shank

Hymenopellis radicata

Bottle palm

Hyophorbe lagenicaulis

St. John's Wort

Hypericum

Tutsan

Hypericum androsaemum

Aaron's Beard

Hypericum calycinum

St. John's Wort

Hypericum perforatum

Shrubby St. John's Wort

Hypericum prolificum

Brick Cap

Hypholoma lateritium

Cypress-leaved plait-moss

Hypnum cupressiforme

Catsear

Hypochaeris radicata

Polka Dot Plant (genus)

Hypoestes

White Ribbon Bush

Hypoestes forskaolii

Polka Dot Plant

Hypoestes phyllostachya

Monk's-hood lichen

Hypogymnia physodes

Hard

Pignut

Hyptis suaveolens

Hyssop

Hyssopus officinalis

Globe Candytuft

Iberis umbellata

Holly

Ilex

English Holly

Ilex aquifolium