Lamium x 'Cecilia Lee' Lamium album 'Friday'
Lamium amplexicaule Lamium byzantinum
Lamium galeobdolon Lamium galeobdolon 'Florentinum'
Lamium galeobdolon 'Herman's Pride' Lamium galeobdolon 'Variegatum'
Lamium maculatum Lamium maculatum 'Anne Greenaway'
Lamium maculatum 'Aureum' Lamium maculatum 'Beacon's Silver'
Lamium maculatum 'Beedham's White' Lamium maculatum 'Chequers'
Lamium maculatum 'Golden Anniversary' Lamium maculatum 'Orchid Frost'
Lamium maculatum 'Pink Pewter' Lamium maculatum 'Purple Dragon'
Lamium maculatum 'Shell Pink' Lamium maculatum 'White Nancy'
Lampranthus aurantiacus Lampranthus aurantiacus 'Sunman'
Lampranthus deltoides Lampranthus spectabilis
Lampranthus vredenbergensis Lapidaria margaretae
Lasthenia californica Lastreopsis microsora var. pentangularis
Lathyrus latifolius Lathyrus odoratus
Lathyrus odoratus 'Explorer' Laurentia axillaris
Laurentia axillaris 'White Star' Laurentia fluviatilis
Laurentia petraea Lavandula stoechas 'Kew Red'
Lavatera x 'Pink Beauty' Lavatera x 'Red Rum'
Lavatera thuringiaca 'Barnsley' Lavatera thuringiaca 'Bredon Springs'
Lavatera thuringiaca 'Candy Floss' Lavatera thuringiaca 'Kew Rose'
Lavatera trimestris Lavatera trimestris 'Novella'
Layia platyglossa Lechenaultia biloba 'Moora'
Ledebouria socialis Ledebouria socialis 'Variegata'
Lemna gibba Leonotis cardiaca
Leonotis leonurus Leonotis leonurus 'Alba'
Leonotis menthifolia Leontopodium alpinum
Lepidium virginicum Lepisorus bicolor
Lespedeza x 'Homolosa' Lespedeza capitata
Lespedeza cuneata Lespedeza thunbergii
Lespedeza thunbergii 'Gilbraltar' Leucanthemum x superbum
Leucanthemum x superbum 'Aglaia' Leucanthemum x superbum 'Alaska'
Leucanthemum x superbum 'Becky' Leucanthemum x superbum 'Crazy Daisy'
Leucanthemum x superbum 'Filigran' Leucanthemum x superbum 'Little Princess'
Leucanthemum x superbum 'Marconi' Leucanthemum x superbum 'Silver Princess'
Leucanthemum x superbum 'Snow Lady' Leucanthemum x superbum 'Snowcap'
Leucanthemum x superbum 'Summer Snowball' Leucanthemum x superbum 'Switzerland'
Leucanthemum x superbum 'Thomas Killen' Leucanthemum vulgare
Leucojum aestivum Leucojum autumnale 'Oporanthum'
Leucophyta brownii 'Silver Bush' Leucospermum cordifolium
Leucospermum tottum Levisticum officinale
Lewisia cotyledon Lewisia cotyledon 'Ashwood Strain'
Lewisia cotyledon 'Hybrid Mix' Lewisia longipetala 'Little Plum'
Leymus arenarius Leymus arenarius 'Glauca'
Leymus condensatus Leymus condensatus 'Canyon Prince'
Leymus secalinus Liatris ligulistylis
Liatris microcephala Liatris pycnostachya
Liatris spicata Liatris spicata 'Alba'
Liatris spicata 'Floristan Violet' Liatris spicata 'Kobold'