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| Botanical / Common Name |  Description | Photo | 
| Lamiastrum galeobdolon Yellow Archangel | shade, massing, ground cover, blooms April-June, 1-2 ft., yellow flowers, part shade, Zone 4-9 | |
| Lamiastrum galeobdolon 'Herman's Pride’ Herman's Dead Nettle | shade, massing, ground cover, blooms April-June, 1 ft., silver on dark-green foliage, clump former, Zone 4-9 | |
| Lamium maculatum 'Beedham's White' Dead Nettle | shade, massing, ground cover, blooms Spring, pure white flowers, yellow foliage, Zone 4-9 | |
| Lamium maculatum 'Chequers' Dead Nettle | shade, massing, ground cover, blooms Spring, 6-8" Foliage of medium green with a white center rib, but necessarily on all leaves. Flowers purple pink blooming April - May, Zone 4-9 | |
| Lamium maculatum 'Elizabeth de Haas' Dead Nettle | shade, massing, ground cover, blooms Spring, pink flowers, good growers, part shade, Zone 4-9 | |
| Lamium maculatum 'Pink Pewter' Dead Nettle | shade, massing, ground cover, blooms Spring, 6" Foliage silvery green, flowers light pink blooming April - May, Zone 4-9 | |
| Lamium maculatum 'Red Nancy' Dead Nettle | shade, massing, ground cover, blooms Spring, 4-6 in., red flowers, silver leaves, Zone 4-9 | |
| Lamium maculatum 'Silbergroschen’ Dead Nettle | shade, massing, ground cover, blooms Spring, 4-6 in. high, pink flowers, spotted silver foliage, Zone 4-9 | |
| Lamium maculatum 'White Nancy' Dead Nettle | shade, massing, ground cover, blooms Spring, 4-6 in. high, white flowers, blooms May-June, Zone 4-9 | |
| Lavandula angustifolia  'Hidcote Blue’ English Lavender | sun, dry conditions, blooms in June, 2 ft., dark blue flowers, herb gardens, edging, Zone 5-9 | |
| Lavandula angustifolia  'Munstead' Lavender | sun, dry conditions, blooms in June, 1-1.5 ft., fragrant deep purple flowers, good for massing in dry gardens, compact grower, Zone 5-9 | |
| Lavandula dentata Dutch Lavender | sun, dry conditions, blooms in June, Zone 5-9 | |
| Lavandula intermedia typ. 'England' Lavender | sun, dry conditions, blooms in June, 1-2 ft., violet flowers, attractive silver foliage, Zone 5-9 | |
| Ledebouria cooperi | profusion of pink flowers in March, green foliage with brownish stripes, ground cover, sun, Zone 8-10 | |
| Leucanthemum superbum ‘Aglaia’ (Chrysanthemum) Shasta Daisy | sun, Summer blooming, 2 ft., large double white frilly flowers with yellow center, dark green foliage, part shade, Zone 4-9 | |
| Leucanthemum superbum 'Alaska' (Chrysanthemum) Shasta Daisy | sun, Summer blooming, 2-3 ft., large single white flower with yellow center, Zone 4-9 | |
| Leucanthemum superbum 'Becky' (Chrysanthemum) Shasta Daisy | sun, Summer blooming, 2003 PPA Plant of the Year, 3-4 ft., large single white flower, upright, rich-blooming, Zone 4-9 | |
| Leucanthemum superbum 'Dwarf Snow Lady' (Chrysanthemum) Shasta Daisy | sun, Summer blooming, 1 ft., pure white flowers, Zone 4-9 | |
| Leucanthemum superbum ‘Esther Read’ (Chrysanthemum) Shasta Daisy | sun, Summer blooming, 2 ft., large double white flowers with yellow center, sun to part shade, blooms mid-Summer, Zone 4-9 | |
| Leucanthemum superbum 'Snow Cap' (Chrysanthemum) Shasta Daisy | sun, Summer blooming, 8-10" Compact foliage of glossy, dark green leaves. Pure white single floers with yellow center., Zone 4-9 | |
| Leucanthemum superbum 'Switzerland' (Chrysanthemum) Shasta Daisy | sun, Summer blooming, 2-3 ft., long lasting, large white flowers, hardy grower, Zone 4-9 | |
| Leucanthemum superbum ‘Venus’ (Chrysanthemum) Shasta Daisy | sun, Summer blooming, 2- 3 ft. pink double flowers, Zone 4-9 | |
| Lewisia cotyledon Regenbogen Hybrids Rainbow Hybrids | mixed flowers,dry soil/full sun, rock garden, Zone 6-9 |   click to enlarge | 
| Liatris pycnostachya Gayfeather | sun, groups, Summer blooming3-4 ft., good cut and border perennial for Summer color, bright purple flowers, Zone 4-8 | |
| Liatris spicata Gayfeather | sun, groups, Summer blooming, 2-3 ft., purple flowers, good cut flower, Zone 4-8 | |
| Liatris spicata 'Floristan Violett' Gayfeather | sun, groups, Summer blooming, 3-4 ft., dark violet flowers, Zone 4-8 | |
| Liatris spicata 'Floristan Weiss' Gayfeather | sun, groups, Summer blooming, 3-4 ft., fluffy white flowers, Zone 4-8 | |
| Liatris spicata 'Kobold' Gayfeather | sun, groups, Summer blooming, 1-2 ft., mauve-pink flowers, compact variety of the Liatris, good cultivar for borders, Zone 4-8 | |
| Ligularia dentata 'Desdemona' (L. clivorum) Leopard Plant | part shade, groups, massing, no western sun, blooms late Summer, 3-4 in., large golden daisy-like flowers, purple-green foliage, Zone 5-9 | |
| Ligularia dentata 'Othello' (L. clivorum) Leopard Plant | part shade, groups, massing, no western sun, blooms late Summer, 2-3 ft., similar to 'Desdemona' blooms dark yellow flowers later, moisture loving, Zone 5-9 | |
| Ligularia dentata 'Woerlitzer Gold' (L. clivorum) Leopard Plant | part shade, groups, massing, no western sun, blooms late Summer, 3-4 ft., large yellow daisy-like flowers, purplish foliage, Zone 5-9 | |
| Ligularia stenocephala 'The Rocket' Leopard Plant | part shade, groups, massing, no western sun, blooms late Summer, 4-5 ft., yellow spiked flowers, large w/jagged edges, Zone 5-9 | |
| Liriope muscari 'Big Blue' Lily-turf | full-part shade, ground cover, blooms Aug-Sept, 1 ft., lavender-blue flowers in Aug, moist conditions during growing season, Zone 6-10 | |
| Liriope muscari 'Monroe White' Lily-turf | full-part shade, ground cover, blooms Aug-Sept, 1-2 ft., white flowers, massing, Zone 6-10 | |
| Liriope muscari ‘Silver Dragon’ Lily-turf | full-part shade, ground cover, blooms Aug-Sept, 10-15 in., variegated foliage with pale lavender flowers, sun or shade, Zone 7-10 | |
| Liriope muscari ‘Silvery Sunproof’ Lily-turf | full-part shade, ground cover, blooms Aug-Sept, 12-18 in., lavender flowers, variegated, has almost white leaves in full sun, more green or yellow-green in part shade, blooms late Summer, Zone 6-10 | |
| Liriope muscari 'Traebert White' Lily-turf | full-part shade, ground cover, blooms Aug-Sept, 1-2 ft., an improved selection with large white flowers, Zone 6-10 | |
| Liriope muscari 'Variegata' Lily-turf | full-part shade, ground cover, blooms Aug-Sept, dark lavender flowers, yellow striped foliage, massing, Zone 7-10 | |
| Liriope spicata Lily-turf | full-part shade, ground cover, blooms Aug-Sept, 1 ft., lavender flowers with glossy narrow dark green foilage, creeping, massing, good for difficult areas, Zone 6-10 | |
| Lithodora diffusa 'Heavenly Blue' | 4-6" An evergreen foliage of dark green leaves. A multitude of deep blue-violet flowers blooming May-June. Full sun to partial shade, Zone 6-8 | |
| Lobelia cardinalis Cardinal Flower | part shade, blooms in mid-Summer, 3-4 ft., red flowers, long blooming, moisture loving, Zone 3-9 | |
| Lobelia siphilitica 'Alba' Cardinal Flower | part shade, blooms in mid-Summer, 2 ft., white flowers, Zone 3-9 | |
| Lobelia siphilitica  'Blue Selection' Cardinal Flower | part shade, blooms in mid-Summer, 2 ft., blue flowers, Zone 3-9 | |
| Lychnis coronaria Catchfly | 2-3 ft., dark magenta flowers, silver foliage, Summer blooming, sun, dry, Zone 5-9 | |
| Lychnis viscaria 'Thurnae' Catchfly | 1 ft., dark carmine red flowers, Zone 5-9 | |
| Lysimachia clethroides Loosestrife | 2-3 ft., pure white flowers July-Sept, sun, massing, moisture-loving, Zone 6-9 | |
| Lysimachia nummularia  'Aurea' Creeping Jenny | 2-6 in., lays flat, yellow ground cover, full sun-partial shade, massing, Zone4-8 | |
| Lysimachia nummularia  'Goldi' Creeping Jenny | 1-3" Cascading foliage of golden green leaves. Flowers golden yellow blooming Aug.-Sept.,, Zone 4-8 | |
 
     
                           
                           
                           
                           
                          


 
                           
                           
                           
                           
                           
                           
                           
                           
                           
                           
                           
                           
                           
                           
                           
                           
                           
                           
                           
                       
                       
                       
                       
                       
                       
                       
                       
                       
                       
                       
                       
                       
                       
                       
                       
                       
                       
                       
                       
                       
                       
                       
                       
                       
                       
                       
                       
                       
                       
                      
 
                       
                       
                       
                       
                       
                       
                       
                       
                       
                       
                      