RHS Seed Exchange rhs.org.uk/seedlist Introduction to RHS Seed Exchange 2121 The Royal Horticultural Society is the UK’s Dispatch of Orders leading gardening charity, which aims to enrich We will start to send out orders from January everyone’s life through plants, and make the UK a 2020 and dispatch is usually completed by the greener and more beautiful place. This vision end of April. If you have not received your seed underpins all that we do, from inspirational by 1st May please contact us by email: gardens and shows, through our scientific [email protected] research, to our education and community programmes. We’re committed to inspiring Convention on Biological Diversity everyone to grow. 3Nagoya Protocol4 In accordance with the Convention on Biological Most of the seed offered is collected in RHS Diversity (CBD), the Royal Horticultural Society Gardens. Other seed is donated and is offered supplies seed from its garden collections on the under the name provided by the donor. In many conditions that: cases only limited quantities of seed are available. ⅷ The plant material is used for the common However, we feel that even small quantities good in areas of research, education, should be distributed if at all possible. conservation and the development of horticultural institutions or gardens. Our seed is collected from open-pollinated If the recipient seeks to commercialise the plants, therefore may not come true. ⅷ genetic material, its products or resources derived from it, then written permission must Please note we are only able to send seed to be sought from the Royal Horticultural addresses in the UK and EU6 including Society. Such commercialisation will be Switzerland6 Norway and Iceland5 subject to the conditions of a separate agreement. Applications for RHS seed should be received by 31st March 2020. ⅷ The genetic material, its products or resources derived from it are not passed on to a third party for commercialisation without written permission from the Royal Horticultural Society. ⅷ It is a condition of supply that any publications resulting from the use of the plant material should acknowledge the Royal Horticultural Society as supplier. A copy of any publication, report or data gained from the material must be logged with the Royal Horticultural Society Lindley Library. 2 Abbreviations A Annual B Biennial BCT Bulb, corm or tuber G Grass H Herbaceous plant R Rock garden plant S Shrub T Tree Alliaceae 26 Allium cristophii , BCT , bulbous, glaucous leaves and large flowerheads made up of many small, purple, star-like flowers. 50cm. Apiaceae 7 Ammi majus , A, upright annual with umbels of small white flowers in the summer. 0.5–1m. 52 Anthriscus sylvestris , H, fern-like leaves and umbels of tiny white flowers. 1m. 56 Astrantia major , H, erect, wiry stems bearing flowerheads in a range of colours from pink to deep purplish-red in late spring. 60–90cm. 8 Bupleurum rotundifolium , A, branching annual with roundish leaves and clusters of tiny yellow flowers. 60cm. 61 Cenolophium denudatum , H, finely-divided dark green leaves, bearing many flat umbels of greenish-white flowers in summer and autumn. 70cm. 74 Eryngium agavifolium , H, evergreen perennial with a rosette of sharply toothed, sword-shaped leaves and small, green flowerheads in late summer. 1m. 15 Eryngium giganteum , B, sea holly with steel blue flowers and silvery white bracts, fading to light brown. 1.2m. 75 Eryngium pandanifolium , H, a dense clump of large, spiny-margined blue-green leaves. In late summer it produces long stems bearing many small, round, purplish- grey flowerheads. 4m. 76 Ferula tingitana , H, a tall, architectural perennial with umbels of yellow-green flowers in summer. 1.5m. Apocynaceae 49 Amsonia hubrichtii , H, narrow leaves and pale blue star-shaped flowers in spring. Good autumn colour. 60–80cm. 3 50 Amsonia tabernaemontana var5 salicifolia , H, slender leaves and star-like clusters of steely blue flowers in late spring into early summer. 0.9m. Araliaceae 146 Fatsia japonica , S, exotic-looking, evergreen shrub of open, spreading habit, with large glossy lobed leaves and small white flowers in globose clusters, followed by small black fruits. 4m. Asparagaceae 32 Galtonia candicans , BCT , bulbous, conical racemes of fragrant, nodding, bell- shaped white flowers in late summer. 0.5–1m. 84 Hosta sieboldiana var5 elegans , H, large clump of broad, blue-grey leaves to 20–30cm in length and racemes of lilac-tinged white, bell-shaped flowers. 75cm. 33 Hyacinthoides non-scripta , BCT , bulbous, linear leaves with arching racemes of fragrant, tubular, violet-blue flowers in spring. 0.5m. 35 Muscari armeniacum , BCT , bulbous, erect stems bearing dense spikes of white- tipped, violet-blue, egg-shaped flowers in spring. 20cm. 135 Paradisea liliastrum , R, a clump-forming herbaceous perennial to 60cm in height, with grassy leaves and erect stems bearing lily-like white flowers in early summer. Asphodelaceae 54 Asphodeline lutea , H, blue-green leaves with dense racemes of fragrant star- shaped yellow flowers. 1.2m. 55 Asphodelus aestivus , H, grey-green linear leaves and spires of pink-veined, white star-like flowers in late spring. 90cm. Asteraceae 58 Berkheya purpurea , H, rosette forming, with large purplish-white flowers and jagged, silvery leaves. Good for dry, sunny sites. 40cm. 9 Centaurea cyanus , A, solitary deep blue flowers in late spring and summer. 0.75m. 62 Centaurea macrocephala , H, a large, clump-forming perennial with yellow flowerheads 5cm across in summer from brown buds. 1m. 10 Coreopsis tinctoria , A, pinnate foliage and abundant yellow daisy-like flowers with deep red centres. 90cm. 11 Cosmos bipinnatus , A, free flowering with fine, fern-like foliage and saucer- shaped flowers in pink, red and white. 1.5m. 4 12 Cosmos sulphureus , A, produces masses of orange flowers over the summer. Is tolerant of dry conditions. 0.5–1m. 73 Echinacea purpurea , H, upright perennial with solitary flowers, slightly reflexed purple petals with a brown central disk. 1m. 132 Erigeron karvinskianus , R, forming wide mats to 15cm in height, with narrow, hairy leaves and daisy-type flowerheads 15mm in width, opening white but soon turning pink. 15cm. 79 Gazania linearis , H, mat-forming growth habit with large solitary daisy-like flowers in shades of yellow and orange. 0.25–0.50m 17 Glebionis segetum , A, upright with pinnately lobed leaves and solitary, bright yellow, daisy-like flowerheads in summer. 0.5–1m. 18 Helianthus annuus , A, usually tall and erect with large daisy-like flowerheads in shades of yellow, orange or brown. 1–4m. 22 Onopordum acanthium , B, architectural, with spiny, grey leaves and purple thistle-like flowerheads in summer. 2.5–4m. Bignoniaceae 140 Campsis radicans , S, a vigorous self-clinging woody climber growing to 10m, with pinnate leaves and clusters of bright orange or red, trumpet-shaped flowers in late summer. 141 Catalpa bignonioides , T, pale green, broad-ovate leaves to 25cm in length. Flowers 3 –4cm in width, white, marked with orange and purple, in conical panicles. Fruit a slender bean-like pod. 12m. Brassicaceae 82 Hesperis matronalis , H, loose clusters of white or pale to mid purple scented flowers appear in late spring and early summer. 60–90cm. 89 Lunaria rediviva , H, heart-shaped, finely toothed leaves, bearing racemes of fragrant, lilac-white flowers in late spring to early summer. 90cm. Bromeliaceae 72 Dyckia frigida , H, shrubby rosette-forming, evergreen succulent with yellow flowers. 60cm. Campanulaceae 46 Adenophora koreana , H, a deciduous perennial with bell-shaped, violet-blue flowers in summer, above rounded basal leaves. 1m. 5 60 Campanula latifolia , H, clump-forming with oval leaves and loose racemes of nodding bell-shaped violet-blue or white flowers in summer. 1.2m. Caprifoliaceae 63 Cephalaria gigantea , H, clump forming with tall, branched stems carrying light yellow scabious-like flowerheads to 6cm across in summer. 1.5–2.5m. 14 Dipsacus fullonum , B, bright green prickly foliage. Flowerheads are cone-shaped, stiffly bristly and the flowers are tiny and blue, appearing in a band round the flowerhead over an extended flowering time. 2m. 86 Knautia macedonica , H, pinnately lobed basal leaves with a succession of deep crimson pincushion-like flowerheads across from mid-summer. 1m. 102 Scabiosa columbaria , H, a compact herbaceous perennial, with grey-green leaves and pale blue-lilac flowerheads from summer to early autumn. 45cm. 107 Succisella inflexa , H, clump-forming with upright slender stems bearing pincushion-like, lilac-blue to pale purple flowers from summer. 80cms. 113 Valeriana officinalis , H, an upright perennial with pinnate leaves and rounded clusters of small pink or white flowers in summer. 1.5m. Caryophyllaceae 90 Lychnis chalcedonica , H, an erect herbaceous perennial with oval leaves and small, bright vermilion flowers in compact, domed heads. 1m. 91 Lychnis coronaria , H, a short-lived perennial with silvery-grey felted leaves and sprays of long-stalked, magenta flowers in summer. 75cm. 103 Silene dioica , H, clump-forming, semi-evergreen, with dark green leaves and clusters of rose-pink flowers with notched petals from late spring. 80cm. Celastraceae 144 Euonymus hamiltonianus , S, a tree-like, deciduous shrub to 6m tall. Small pale green flowers are followed by four-lobed, dusky pink fruit that split to reveal orange seeds. Crassulaceae 138 Umbilicus oppositifolium , R, a prostrate evergreen perennial with fleshy, ovate leaves and branched, arching racemes of small, bright yellow flowers. 20cm. Datiscaceae 64 Datisca cannabina , H, tall, clump-forming, with upright stems, with long, hanging tassels of tiny greenish-white flowers in summer. 2m. 6 Ericaceae 143 Enkianthus campanulatus , S, deciduous, erect habit, with small elliptic leaves with good autumn colour. Clusters of small cream or reddish, bell-shaped flowers from late spring to midsummer. 4–5m. Euphorbiaceae 145 Euphorbia × pasteurii , S, an architectural, robust, evergreen shrub to around 1m tall.