| Oenothera acaulis | Tap-rooted. Rosettes of pinnate lvs. Huge trumpet-shaped white flws fade pink. (5-7) 15cm. | £3.00 |
| Oenothera 'Apricot Delight' | Large, flat, lemony-gold flws fade rich orange-red. Upright. (5-7) 60cm. | £3.25 |
| Oenothera campylocalyx | £3.00 | |
| Oenothera 'Crown Imperial' | Large clusters of deep golden buttery-yellow flws all summer. Lvs picoteed red. (7-9) 40cm | £3.75 |
| Oenothera fruticosa 'African Sun' | Free-flowering with golden-yellow flws from red buds. Willowy stems with narrow lvs. (7-9) 60cm | £3.50 |
| Oenothera fruticosa 'Fyrverkeri' (AGM) | Golden -yellow flws from red buds. Rosettes of purple-brown lvs. (4-7) 60cm. | £3.50 |
| Oenothera fruticosa glauca (AGM) | Light yellow flws. Broad, glaucous hairy lvs. (4-7) 60cm. | £3.50 |
| Oenothera fruticosa glauca 'Erica Robin' | Clusters of small, bright yellow flws. New lvs gold, with pink spotting.(5-8) 60cm. | £3.50 |
| Oenothera fruticosa 'Michelle Ploegger' | Dark golden-yellow flws on a dwarf form. Purple-flushed lvs. (4-8) 40cm. | £3.50 |
| Oenothera glazioviana | Upright sef-seeding biennial with large yellow flws, flushed red. Red spotted stems. (6-9) 150cm | £3.25 |
| Oenothera macrocarpa (AGM) | syn.missouriensis. Trailing stems with cup-shaped, bright golden-yellow flws. (4-8) 15cm. | £3.25 |
| Oenothera muricata | Closely related to biennis but perennial. Clusters of yellow flws on tall stems. (6-9) 90cm. | £3.00 |
| Oenothera oakesiana | £3.25 | |
| Oenothera pallida | Large fragrant papery-white flws, veined pink, ageing dark-pink. Bushy. (6-9) 45cm | £3.25 |
| Oenothera speciosa | Cup-shaped, fragrant white flws age pink. Opens during the day. Spreads. (5-8) 30cm. | £3.25 |
| Oenothera speciosa 'Alba' | Cup-shaped, fragrant white flws, fading the palest pink. Spreading. (6-9) 30cm | £3.50 |
| Oenothera speciosa childsii | £3.50 | |
| Oenothera speciosa 'Pink Petticoats' | Soft pink flws delicately veined red. Fragrant. Running habit. (5-8) 30cm. | £3.25 |
| Oenothera speciosa 'Siskiyou' | Large rose-pink flws, deeply veined purple. Spreads. (5-8) 30cm. | £3.50 |
| Oenothera 'Summer Sun' | Extremely floriferous. Clusters of summer-yellow flws. Lvs flushed red. (5-8) 45cm. | £3.50 |
| Olsynium douglasii (AGM) | Nodding, bell-shaped, satin textured rich purple flws. Grassy lvs. (2-3) 30cm. | £3.50 |
| Omphalodes cappadocica (AGM) | Small sprays of intense gentian-blue flws. Slightly crinkled lvs. (3-4) 20cm. | £3.50 |
| Omphalodes cappadocica 'Cherry Ingram' (AGM) | Abundant sprays of large, bright-blue flws. More or less evergreen ground cover. (4-5) 20cm | £3.50 |
| Omphalodes cappadocica 'Lilac Mist' | Sprays of small, lilac-blue flws. Very profuse flowering. (3-5) 20cm. | £3.75 |
| Omphalodes cappadocica 'Starry Eyes' | Palest lilac-blue flws with a broad blue midrib on each petal, giving a starry effect.(3-5)20cm | £3.75 |
| Omphalodes verna | Creeping mats of rich-green lvs studded with white-eyed, bright-blue flws. (3-5) 20cm. | £3.50 |
| Omphalodes verna 'Alba' | Sprays of small white flws. Creeping mats of softly-hairy lvs. (3-5) 20cm. | £3.50 |
| Omphalodes verna 'Elfenauge' | Elegant sprays of small, pale-icy-blue flws. One of the best. (3-5) 20cm. | £3.75 |
| Onobrychis cornuta | Cushion of silky hairy pinnate lvs. Short racemes of white flws, flushed lavender. (5-6) 40cm | £4.00 |
| Onobrychis tournefortii | Mounds of pinnate, glabrous lvs. Clusters of creamy-yellow flws with red veining. (5-6) 45cm | £4.00 |
| Onobrychis viciifolia | Spikes of bright-rose flws. Rosettes of silver, pinnate lvs. (5-6) 60cm. | £3.50 |
| Ononis spinosa | Woody-based with erect stems, carrying small pea-like bright pink flowers. (6-8) 30cm | £3.50 |
| Onopordum acanthium | Huge, white-felted rosettes of spiny lvs. Pale-lilac thistles on statuesque stems. (6-7) 300cm | £3.75 |
| Onopordum nervosum (AGM) | Huge, pinnate, spiny, silver-toothed lvs. Large purple thistles. (6-7) 250cm. | £4.00 |
| Ophiopogon bodinieri B&L12505 | Running clumps of narrow, dark-green lvs. Pink tinted, white flws. (6-8) 30cm. | £3.25 |
| Ophiopogon intermedius | Small arching tufts of dark green lvs. Lilac flws followed by blue fruits. (7-8) 20cm | £3.25 |
| Ophiopogon jaburan | Arching clumps of lustrous, dark-green lvs. White flws & violet fruits. (7-8) 45cm. | £3.25 |
| Ophiopogon jaburan 'Vittatus' | Arching, strap-like pale-green lvs heavily variegated creamy-white. White flws. (7-8) 60cm. | £4.00 |
| Ophiopogon japonicus 'Compactus' | Clumps of tiny, narrow dark-green, rigid lvs. Lilac tinged white flws. (6-7) 10cm. | £3.25 |
| Ophiopogon japonicus 'Kigimafukiduma' | £3.75 | |
| Ophiopogon japonicus 'Nanus Variegatus' | £3.50 | |
| Ophiopogon japonicus 'Nippon' | Small, compact form, with narrow, grassy lvs. Pale, mauve-white flws & blue fruit. (6-7)10cm | £3.50 |
| Ophiopogon planiscapus | Arching, dark-green lvs. Short spikes of bell-shaped pale purple-white flws. (6-7) 20cm. | £3.25 |
| Ophiopogon planiscapus 'Little Tabby' | Small tufts of green & cream, evergreen lvs. Spikes of small, white flws. (6-7) 15cm. | £3.50 |
| Ophiopogon planiscapus 'Nigrescens' (AGM) | `Black Dragon'. Deepest black, arching lvs. Short sprays of mauve flws. (6-7) 20cm. | £3.75 |
| Opuntia compressa | syn. humifusa. Prickly pads and bright yellow flws with an orange-red centre. (5-6) 20cm | £3.50 |
| Origanum amanum (AGM) | Low spreader. terminal whorls of deep pink flws from purple-flushed bracts. (8-9) 15cm | £3.25 |
| Origanum 'Barbara Tingey' | Tubular pink flws, from hop-likelime-green bracts, purple with age. Blue-green lvs. (6-9) 20cm | £3.50 |
| Origanum 'Bristol Cross' | Small round silver-grey leaves. Small purple flws from lime-green pink-tinged bracts. (6-8) 20cm | £3.25 |
| Origanum 'Buckland' | Upright with rounded, hairy grey-green lvs. Pink flws in pale pink bracts. (6-8) 20cm | £3.25 |
| Origanum 'Dingle Fairy' | Large hop-like, apple-green bracts with small pink-purple flws. Arching stems. (7-8) 20cm. | £3.25 |
| Origanum 'Erntedank' | Soft purple flws in airy pyramidal panicles. Dark-green lvs. (7-8) 30cm. | £3.25 |
| Origanum 'Kent Beauty' | Semi-evergreen with whorls of small, tubular pink flws with large rose-pink bracts. (5-6) 15cm | £3.50 |
| Origanum laevigatum 'Herrenhausen' (AGM) | Wiry stems with bunches of tiny purple flws. Purple-flushed lvs. (4-9) 45cm. | £3.25 |
| Origanum laevigatum 'Hopley's' | Large, deep-pink flws in large purple bracts. Long narrow whorls. (4-9) 60cm. | £3.25 |
| Origanum laevigatum 'White Charm' | £3.25 | |
| Origanum 'Norton Gold' | Mats of intense golden, aromatic lvs. Spikes of mid-pink flws. (7-9) 45cm. | £3.25 |
| Origanum 'Nymphenburg' | Clouds of tiny, tubular, cerise-pink flws in red-purple bracts. Grey-green lvs. (5-8) 30cm. | £3.25 |
| Origanum 'Rosenkuppel' | Deep maroon buds open to rich wine flws. Rounded, hairy, purple-flushed lvs. (5-8) 60cm. | £3.25 |
| Origanum 'Rotkugel' | Rather small lavender flwers from red-flushed purple bracts. Grey-flushed lvs. (6-9) 45cm | £3.25 |
| Origanum rotundifolium (AGM) | Hop-like lemon-green bracts & small, tubular, pale-pink flws. (5-8) 20cm. | £3.25 |
| Origanum sipyleum | Hard cushions of glaucous, lance-shaped lvs. Small, pale-pink flws in green bracts. (6-8)50 | £3.50 |
| Origanum vulgare 'Acorn Bank' | Dense carpets of long, narrow burnished-gold lvs, almost white in summer. Pink flws.(6-8)30 | £3.25 |
| Origanum vulgare 'Aureum' (AGM) | Carpets of golden lvs & pink tubular flws. (6-8) 30m. | £3.00 |
| Origanum vulgare 'Gold Tip' | £3.25 | |
| Origanum vulgare 'Polyphant' | Mounds of attractively variegated, grey-green lvs, edged cream. purple-pink flws. (6-9)20cm | £3.25 |
| Origanum vulgare 'Thumble's variety' | Pink-purple flws from maroon calyces. Large, gold, burnished lvs. (6-9) 45cm. | £3.25 |
| Ornithogalum arianum | £4.25 | |
| Ornithogalum chionophilum | Rare Cypriot endemic, with short spikes of white flws. Narrow, strap-like lvs. (5-6) 20cm | £4.00 |
| Ornithogalum fimbriatum | £3.25 | |
| Ornithogalum longibracteatum | Tall racemes of bell-shaped white flws, striped green. Succulent pale lvs. (6-7) 120cm | £3.25 |
| Ornithogalum magnum | Tall spikes of white flws, flushed green. Narrow lvs. (5-6) 60cm. | £3.50 |
| Ornithogalum narbonense | Upright perennial with pyramidal panicles of starry, white flws. Linear grey lvs. (4-6) 75cm. | £3.50 |
| Ornithogalum nutans (AGM) | One sided spikes of silvery-white flws funnel-shaped flws, striped green. (4-5) 30cm. | £3.00 |
| Ornithogalum oligophyllum | Starry white flws emerge from green buds, from the ground. Grey-green lvs. (1-3) 20cm. | £3.50 |
| Ornithogalum orthophyllum AH.9405 | £3.25 | |
| Ornithogalum pyramidale | Neat pyramidal heads of starry, white flws. Lvs disappear at flowering. (5-7) 60cm. | £3.50 |
| Ornithogalum reverchonii | Lax lvs in growth in autumn. Tall spikes of bell-shaped white flws with cut petals. (5-6) 50cm | £3.75 |
| Ornithogalum saundersiae | Heads of cup-shaped creamy flws, with black stamens. Strap-like lvs. Shelter. (2-4) 90cm. | £3.75 |
| Ornithogalum sintensii | Woodland species with white flws which have twisted petals and striped green buds. (3-5) 10cm | £3.00 |
| Orthrosanthus chimboracensis | Shallow, bowl-shaped lavender-blue flws. (5-7) 60cm. | £3.50 |
| Orthrosanthus laxus | Spike of starry, pale-blue flws. Grassy lvs. (7-8) 60cm. | £3.50 |
| Orthrosanthus multiflorus | Spikes of wedgewood blue flws. Fans of sword-like lvs. Sheltered spot. (6-7) 50cm | £3.50 |
| Orthrosanthus polystachyus | Spikes of sky-blue starry flws. (6-7) 60cm. | £3.50 |
| Oxalis articulata 'Festival' | Large rounded lvs. Big deep pink flws, veined deeper. Shelter. (5-10) 15cm | £3.25 |
| Oxalis depressa (inops) | Mounds of pale, grey green lvs. Cup-shaped warm-pink flws with a white halo. (5-7) 10cm | £3.00 |
| Oxalis depressa 'Irish Mist' | Mounds of pale grey-green leaves. Soft rose pink flws with a yellow throat. (5-7) 10cm | £3.50 |
| Oxalis 'Fanny' | £3.25 | |
| Oxalis magellanica 'Nelson' | Creeping carpets of tiny, shamrock-like,semi-evergreen lvs, bronze in sun. White flws.(5-6)5 | £3.00 |
| Oxalis obtusa | £3.25 | |
| Oxalis oregana | £3.25 | |
| Oxalis oregana smalliana | Deep, rose-pink flws. Silver-marked, trifoliate lvs. Best in part shade. (4-9) 20cm. | £3.25 |
| Oxalis rubra | Umbels of silky pink-red flws with a yellow green eye. Leaves hairy underneath. (5-8) 40 | £3.25 |
| Oxalis semiloba | Large brick-pink flws with an ice-green thrat. Fresh-green lvs. Very sheltered spot. (8-10) 15 | £3.50 |
| Oxalis tetraphylla (deppei) | Clover-like lvs, banded purple. Wide funnel-shaped red-pink flws green throated. (5-7) 15cm | £3.00 |
| Oxalis tetraphylla alba | Silky cup-shaped white flws. Carpets of pale-green shamrock-like lvs. (5-7) 30cm | £3.25 |
| Oxalis tetraphylla 'Iron Cross' | `Lucky Clover'. Clover-like lvs with a chocolate blotch. Funnel-shaped carmine flws. (5-7) 20 | £3.25 |
| Oxalis triangularis 'Cupido' | Mounds of beetroot-red lvs. pale pink flws. (6-7) 30cm. | £3.25 |
| Oxalis triangularis 'Mijke' | Bright, burgundy-red shamrock leaves. Pale pink flws over a long season. (3-6) 30cm | £3.50 |
| Oxalis triangularis papilionacea (AGM) | Silky, white cup-shaped flws flushed pink. Green lvs, flushed purple beneath. (4-6) 30cm. | £3.25 |
| Oxalis triangularis papilionacea 'Atropurpurea' | Blackish-maroon lvs with a wine-red central zone. Pink flws. (5-8) 20cm. | £3.25 |
| Oxalis triangularis papilionacea 'Rosea' | Large rich burgundy purple lvs. Four petalled, rosy purple flws. (8-9) 15cm | £3.25 |
| Oxalis triangularis triangularis | Leaves have a central blotch, silky pink-red flowers all summer. (6-9) 30cm | £3.25 |