RHODODENDRON REGISTER and CHECKLIST Royal- � Horticulturalr Society Second Edition

A guide to using { The International �- RHODODENDRON REGISTER and CHECKLIST Royal- � Horticulturalr Society Second Edition 0 THE INTERNATIONAL Rhododendron Register • & • Checklist 2nd Edition A companion guide to the online edition CONTENTS Introduction to this Guide 1 Abbreviations 2 Presentation of individual entries in the Register – a brief guide 3 Informal Azalea Groupings 4 Glossary (including illustrations of flower and leaf shapes) 5-8 Introduction to the Register with full details 9-12 Names & Addresses 13-64 Selected Bibliography 65 The International Rhododendron Register and Checklist Second Edition was published in two volumes in 2004. It has not been revised or reprinted. Instead, omissions, corrections and additions have been published annually as Supplements. They are available for download on the RHS or Rhododendron, Camellia & Magnolia Group websites: www.rhs.org.uk/plants/plantsmanship/plant-registration/rhododendron-cultivar- registration/Rhododendron www.rhodogroup-rhs.org/publications/bookpdf/ IMPORTANT The 2004 Register should be read in conjunction with its later Supplements and if certain data is of particular importance, checks should be made that further updates have not been made to an entry. Should uncorrected errors be noticed, unrecorded information be known which might be relevant or of interest, or queries arise from entries, it is important to contact the International Rhododendron Registrar, who is keen to ensure the Register is as complete and accurate as possible. The International Rhododendron Registrar, The Royal Horticultural Society's Garden, Wisley, Woking, Surrey, GU23 6QB, UK. INTRODUCTION TO THIS GUIDE The printed editions of the International Rhododendron Register and Checklist contain a detailed explanation of how the Register should be used, provide a glossary and illustrations to demonstrate various botanical descriptions, include a simplified list of the names and locations of the hybridisers mentioned, and a selected bibliography of reference works for further reading. Using a digital file on screen makes consulting these reference pages whilst trying to decode an entry rather more difficult than with a physical book, especially as they are not included in both volumes which might mean having two very large files open simultaneously. For the reader’s convenience, those reference pages have been extracted and are incorporated into this file. Additional assistance is provided in the form of a list of abbreviations used and a simplified explanation of how each entry is presented. It is suggested that this file is kept open alongside the main Register files as a helpful means of quick access to references without the need to navigate the large number of pages in each volume. IMPORTANT The International Rhododendron Register and Checklist has been scanned and converted into searchable text using OCR technology. It is NOT perfect but it is hoped that it is sufficiently accurate to allow meaningful research. ACKNOWLEDGEMENTS We are grateful to the Royal Horticultural Society for granting us permission to offer this publication digitally whilst an online service to the International Rhododendron Register database is developed. Rhododendron, Camellia & Magnolia Group December 2017 ABBREVIATIONS & ACRONYMS (a) azalea (az) azaleodendron (ICNCP) International Code of Nomenclature for Cultivated Plants – 1995 (r) rhododendron (excluding azaleas, azaleodendrons and vireyas) (s) seed parent (v) vireya rhododendron AM Award of Merit C Commended (discontinued) cv. cultivar FCC First Class Certificate G Grown to first flower by … gp. Group H Hybridised by … (when a plant is indicated to be the result of an open-pollination the role letter “H” is still employed) HC Highly Commended (discontinued) HCC Horticultural Colour Chart I Introduced by … IAPT International Association for Plant Taxonomy ICBN International Code of Botanical Nomenclature ICRA International Cultivar Registration Authority (the RHS in the case of genus Rhododendron) INC: ICRA (1958) Incorporated into records at the time of publication of the first Register (1958) L Listed by … (if the only detail is that the plant was listed by a particular nursery or another source) N Named by … PC Certificate of Preliminary Commendation R Raised by … (used in many earlier records and generally assumed to include what would now be distinguished as H & G) REG Registered by … S Selected by … SCC Second Class Certificate (discontinued) syn. synonym × (Small) Separates the two parental elements which form one half of the registered entry when that individual is the product of a hybrid formula but is not itself registered as a named entity (e.g. ‘Rosa Belton’ x oldhamii (s) X prinophyllum) X (Large) Separates the two parents in an entry (seed parent where known given first) * Award made after Trial PRESENTATION OF INDIVIDUAL REGISTER ENTRIES – a brief guide. (For full details see later in this guide or pp 8-10 in Volume 1) Entries follow a precise order and style: 1) Category of Plant: azalea (a) azaleodendron (az) vireya (v) rhododendron (includes all non-azaleas, azaleodendrons and vireyas) (r) 2) Epithet (unique registered name) 3) Status cultivar (cv.) or Group (gp.) 4) Subcategory Evergreen azalea Deciduous azalea Semi-evergreen azalea Lepidote rhododendron Azaleodendron Elepidote/Lepidote cross 5) Parentage Seed parent where known is shown first (s) Parents separated by X Where parents are themselves the product of crosses their parentage is denoted by x 6) Roles of various individuals involved in the breeding or selection of the entry Raised by (R) Hybridised by (H) Grown to first flower by (G) Selected by (S) Named by (N) Introduced by (I) Incorporated into published records in 1958 (INC: ICRA 1958) Registered by (R) 7) Description a) measurement b) colour c) flowering time 8) Awards made to the plant 9) Any synonyms by which the plant is also known 10) Informal grouping of azaleas to which the entry (if appropriate) belongs to 11) Any other relevant information INFORMAL AZALEA GROUPINGS (mentioned at the end of entries) DECIDUOUS AZALEAS Ghent Knap Hill (including Exbury) Mollis Occidentale Rustica EVERGREEN AZALEAS Amoena Arendsii Back Acres Bobbink & Atkins Coolidge Gable Glenn Dale Indian Kaempferi Kurume Oldhamii Pericat Rutherford Sander Satsuki Vuykiana Wada Tsutsuji (Recorded from Ito (1692, translation published 1984: A Brocade Pillow. Azaleas of Old Japan.) as a grouping for azaleas other than Satsuki) GLOSSARY ACUMINATE tapering very gradually to a point FILAMENT the stalk-like part of the stamen, ACUTE coming to a point that would be contained bearing the anther at its apex within two lines set at 90º FIMBRIATE with a fringed margin ANEMONE-CENTRED of a double flower with FLARE sometimes used interchangeably with numerous petaloid segments in the centre blotch, but usually a marking with a flame-like ANTHER the pollen-bearing part of the stamen, outline. borne at the end of the stalk-like filament FLOCCOSE with dense woolly hairs that fall away APICULATE terminating in a small, abrupt in tufts point (the point formed only from the vein FUNNEL-CAMPANULATE intermediate in shape or midrib) between funnel-shaped and campanulate APPRESSED lying flat FUNNEL-SHAPED see figs A and C ARISTATE extended into a long bristle GLANDULAR HAIRS hairs bearing glands at ATTENUATE narrowing gradually their tips AURICULATE with small, ear-like projections at GLAUCESCENT becoming bluish green the base of the leaf GLAUCOUS bluish green AXILLARY growing from the angle formed by the HOSE-IN-HOSE of flowers with two corolla junction of leaf and stem whorls, one within the other; a normal calyx may BLOOM waxy covering or not be present BLOTCH a defined area of often contrasting colour; IMBRICATE overlapping at the margins may be solid, spotted or a mixture of the two INFLORESCENCE a flower cluster BULLATE with a blistered or puckered surface INDUMENTUM the covering of hairs and/or CALYX the outermost whorl of floral parts; in some scales; may range from very sparse to dense and rhododendrons reduced to a mere rim multilayered CAMPANULATE see figs G and K LAMINA the blade of the leaf CAPITATE forming a dense head-like structure LANCEOLATE see fig. R CILIATE fringed with hairs LEPIDOTE bearing scales CLONE two or more genetically identical LINEAR see fig. Q individuals originally derived from one plant by MATT with a dull surface asexual propagation MUCRONATE terminating abruptly in a short, CORDATE with two rounded lobes forming a deep hard point (the point formed from the limb and sinus vein/midrib) CORIACEUS leathery NECTAR POUCHES see under nectary COROLLA the whorl of floral parts immediately NECTARY nectar-bearing areas on the corolla, inside the calyx; in rhododendron flowers sometimes in sac-like protuberances or pouches usually fused to form a corolla tube towards the OBLANCEOLATE see fig. N base with free lobes towards the apex OBLIQUE of a leaf base where the two margins reach CRENULATE with small rounded teeth the petiole asymmetrically CUNEATE with straight sides converging at the base OBLONG see fig. L CUSPIDATE tapering to a short, narrow point OBOVATE see fig. O DENDROID of a hair that is branched like a tree OBTUSE rounded end which would not be DETERSILE of a indumentum that is eventually contained within two lines set at 90º completely shed ORBICULAR see fig. M DIMORPHIC of scales or leaves that are of two OVARY the basal part of the pistil, containing the distinct kinds ovules; it matures to form the capsule containing DORSAL

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