umbellatum,
  vulgare,
  vulgare nummularium,
  vulgare barbatum,
  vulgare mutabile,
  vulgare grandiflorum,
  vulgare ovalifolium,
  vulgare hysopifolium,
Hemp Tree,
Hippophae rhamnoides,
Holboellia latifolia,
Holly, the,
Honey Locust,
Honeysuckles,
Hop tree,
Hornbeam,
Horse Chestnut,
Hortensia opuloides,
Humming Bird’s Trumpet,
Hybiscus syriacus,
  syriacus vars.,
Hydrangea arborescens,
  hortensis,
  hortensis vars.,
  quercifolia,
  scandens,
  paniculata,
  paniculata grandiflora,
Hydrangea, climbing,
Hymenanthera crassifolia,
Hypericum Androsaemum,
  aureum,
  calycinum,
  elatum,
  hircinum,
  Moserianum,
  oblongifolium,
  Hookerianum,
  nepalensis,
  prolificum,
  uralum,
Idesia polycarpa,
Ilex Aquifolium,
  Aquifolium vars.,
  opaca,
Illicium anisatum,
  floridanum,
  religiosum,
Indian Azalea,
Indigofera Dosua,
  floribunda,
  Gerardiana,
Itea virginica,
Jamesia americana,
Japanese Storax,
Japan Medlar, or Quince,
Jasminum fruticans,
  humile,
  nudiflorum,
  officinale,
  pubigerum glabrum,
  revolutum,
  Wallichianum,
Jerusalem Sage,
Job’s Tears,
Judas tree,
June Berry, the,
Kadsura japonica,
Kalmia angustifolia,
  glauca,
  hirsuta,
  latifolia,
  latifolia vars.,
Kentucky Coffee Tree,
Kerria japonica,
Koelreuteria paniculata,
Labrador Tea,
Laburnum Adami,
  alpinum,
  caramanicum,
  vulgare,
Lady’s Bower,
Lapageria rosea,
Lardizabala biternata,
Laurel, Alexandrian,
  American Great,
  Cherry,
  Ground,
  Mountain,
  Portugal,
  Sheep,
  Spurge,
Laurustinus,
Lavender, common,
Lavandula Spica,
  vera,
Lavatera arborea,
Leather Wood,
Ledum buxifolium,
  groenlandicum,
  latifolium,
  palustre,
Leiophyllum buxifolium,
  thymifolia,
Lemon Scented Verbena,
Lespedeza bicolor,
Leucothoe axillaris,
  Catesbaei,
  Davisiae,
  floribunda,
  recurva,
Leycesteria formosa,
Ligustrina amurensis,
Ligustrum amurense,
  californicum,
  glabrum,
  Ibota,
  Ibota villosum,
  japonicum,
Ligustrum Kellermanni
  lucidum,
  magnoliaefolium,
  ovalifolium,
  Sieboldii,
  sinense,
  strictum,
  villosum,
  vulgare,
Lily, the Mound,
Limonia Laureola,
Linden Tree,
Ling, the common,
Linnaea borealis,
Lippia citriodora,
Liriodendron tulipifera,
Loblolly Bay,
Locust, common,
Lonicera brachypoda,
  Caprifolium,
  flexuosa,
  fragrantissima,
  Periclymenum,
  sempervirens,