Seed Exchange Lots for 2024
h.p. - Hand pollinated seeds.
c.p. - Controlled pollination. (Stigma covered after pollination)
o.p. - Open pollination.
c.w. - Collected in the wild.
com. - Companion plants.
Lots marked with strikethrough are "sold out".
Betty Ann Addison, Minnesota USA
24-001 h.p. Belle Fontaine X Ruby Parasol1
24-002 h.p. carolinianum album Mehlquest, selfed
24-003 h.p. (Ken Janeck x fulvum) X smirnowii
24-004 h.p. Rice Creek X Ruby Parasol1
24-005 h.p. Rice Creek Pink X yedoense var. poukhanense Evergreen azalea
24-006 h.p. Ruby Robin X yedoense var. poukhanense Evergreen azalea
1 Ruby Parasol is brachycarpum X Besse Howells. Hardy to -35ºF. Sun tolerant.
Peter Norris, Massachusetts USA
24-007 o.p. Hal Bruce
24-008 h.p. Main Street X (yuefengense x Sally Fuller)
24-009 h.p. Purple Passion X (yuefengense x Sally Fuller)
24-010 h.p. (yuefengense x Sally Fuller) X Firestorm
24-011 com. Arisaema heterophyllum (Dancing Cobra Lily – must be stratified)
24-012 com. Asclepias tuberosa 'Hello Yellow'
24-013 com. Cardiocrinum cordatum var. glehnii (moist, shade/sun)
24-014 com. Franklinia alatamaha (small flowering tree)
24-015 com. Illicium X 'Woodland Ruby'
24-016 com. Lobelia cardinalis (wild collected, Chilmark, MA)
24-017 com. Stewartia serrata (small flowering tree)
Kristian Theqvist, Finland
24-018 c.p. brachycarpum f. nemotoanum1 X Loisto2 Goal: Orange double flowers.
24-019 c.p. brachycarpum f. nemotoanum1 X Silberpfeil3 Goal: Double flowers, large leaves.
24-020 c.p. (degronianum ssp. heptamerum Enamoto x tsariense)4 X bureavioides5 Withdrawn
24-021 o.p. Kerttu6 X bureavioides5 Goal: Yellow flowers. indumented leaves.
24-022 c.p. Kristian's Sunshine7 X bureavioides5 Goal: Yellow flowers, indumented leaves.
24-023 c.p. Kristian's Sunshine7 X (degronianum ssp. heptamerum Enamoto x tsariense)4 Goal: Yellow flowers, indumented leaves.
24-024 c.p. Kristian's Sunshine7 X Kultu Goal: Yellow flowers.
24-025 c.p. Loisto2 X Silberpfeil3 Goal: Orange flowers, large leaves.
24-026 c.p. Merja8 X Loisto2 Goal: Orange flowers, low growth.
24-027 o.p. pilosum9
24-028 c.w. tomentosum10
1 brachycarpum f. nemotoanum: a semi double flower form of brachycarpum from Japan
2 Loisto: a hardy hybrid from K. Theqvist, Elsie Maria X Böhmen, orange flowers
3 Silberpfeil: smirnowii X rex, very large leaves and huge growth
4 degronianum ssp. heptamerum Enamoto X tsariense: a cross from Joe Harvey (ARHS 052/06), small leaves with good red brown indumentum, large white flowers
5 bureavioides: Warren Berg collection, SB 9022.3, Sichuan, Mugecuo, 12500 ft, very hardy
6 Kerttu: a hardy hybrid from K. Theqvist, Helsinki University X Golden Coach, yellow flowers
7 Kristian’s Sunshine: a hardy hybrid from K. Theqvist, Kullervo X Goldprinz, yellow flowers
8 Merja: a hardy hybrid from K. Theqvist, Helsinki University X Böhmen, orange flowers
9 pilosum: former Menziesia pilosa, now deciduous azalea, comes true as there is no matching nearby pollen source
10 tomentosum: former Ledum palustre, collected wild, Korppoo, Finland
Photos and information on hybrids and species used in the crosses: https://www.rhodogarden.com/ARS/Seed2024.html
Frederick Thurber, Massachusetts, USA
24-029 h.p. Barbara Madeiros X lacteum RSF 75-242 Note: hybridized by Mike Medeiros.
Joe Bruso, Massachusetts USA
24-030 h.p. (Harold Amateis x maximum) X pachysanthum
24-031 com. Cardiocrinum gigantheum
John Weagle, Nova Scotia Canada
24-032 o.p. canadense
24-033 o.p. canadense, white
24-034 o.p. vaseyi, pink
24-035 h.p. vaseyi, white find
Mike McCullough, California USA
24-036 c.w. columbianum (commonly known as western Labrador tea)
24-037 c.w. occidentale GG2 Note: Pale pink flowers.
24-038 c.w. occidentale Flynn Creek 1903 Note: 2 ½” pink & white candy stripe with orange flare.
24-039 c.w. occidentale Mt Tam 1312 Note: White with yellow flare and pink tube.
24-040 c.w. occidentale Mt Tam 2607 Note: White & pink candy stripe with yellow flare.
24-041 c.w. occidentale Mt Tam 3110 Note: White with orange flare, some pink on tube.
24-042 c.w. occidentale Hollister Hills State Vehicular Rec Area.
Jaakko Saarinen, Arboretum Mustila, Finland
24-043 c.w. carolinianum near Sunburst Fall (NC)1
24-044 c.p. canescens (floriferous white, c.w. Jacobs Mtn. Alabama) X atlanticum 'Seaboard' Goal: low, floriferous white azalea.
24-045 c.p. Junistolz X Ted's Cream Cracker Goal: late-flowering plant with large flowers.
24-046 c.w. minus2
24-047 c.p. Sun Glory X Ted's Cream Cracker Goal: large flowers with showy color combinations.
1 Found near Sunburst Falls (NC), 1210–1330 m elevation. mostly white-flowered; species status of carolinianum revived by Albach & Bauer 2022
2 Found near Schoolhouse Falls (NC), 1120–1200 m high elevation, but not carolinianum
Jack Looye, Nova Scotia, Canada
24-048 h.p. Calsap X Arthur Bedford
24-049 h.p. Calsap X (Rhein's Picotee x Madame Cochet)
24-050 h.p. [(carolinianum x Blue Diamond) x Starry Night)] X Boulderwood Blue Note: this carolinianum is a tetraploid.
24-051 h.p. Casanova X Fashion Plate
24-052 h.p. [(Hachman's Charmant X Summer Glow) x Butterscotch1] X Wyandanch Pink
24-053 h.p. (Ingrid Melquest x Rio) X (yellow seedling x Dead Ringer)
24-054 h.p. Lavender Princess X Calsap
24-055 h.p. (maximum x yakushimanum) X Trinity
24-056 o.p. Red Max Note: nothing much else in bloom at the time, so most likely selfed.
24-057 h.p. Roslyn X Arthur Bedford
24-058 h.p. Roslyn X Calsap
24-059 h.p. Souvenir Du Président Carnot X Fireball deciduous azalea
24-060 h.p. [Sundust x (Casanova x Sweet Lulu)] X [(Golden Horseshoe X Yellow Stone) X Blazing Grace]
24-061 h.p. [Sundust x (Casanova x Sweet Lulu)] X (Sundust X Flautando #1-22)
24-062 h.p. Whitney's Late Red X {[Chinaboy x (Charles Dickens x Mars)] x {[(Nova Zembla x (America x Mars)]#2 x (sibling #3)}}
24-063 h.p. degronianum ssp. yakushimanum Koichiro Wada X Black Widow
24-064 h.p. degronianum ssp. yakushimanum Koichiro Wada X brachycarpum var. roseum
24-065 h.p. degronianum ssp. yakushimanum Koichiro Wada X {{[China Boy x (Charles Dickens x Mars)] x [Nova Zembla x (America x Mars)] x Harold Amateis} #1 x {sibling #2}}
1 Butterscotch = Mary Belle X Casanova
Hannu Saarilahti, Finland
24-066 c.p. brachycarpum ssp. brachycarpum Surikogi1 X smirnowii2
24-067 c.p. pseudochrysanthum 'Ben Nelson'3 X pseudochrysanthum RSF 1975/189
24-068 c.p. degronianum ssp. yakushimanum Koichiro Wada X bureavioides4
24-069 c.p. Hellikki5 X Stern von Japan6
24-070 o.p. camtschaticum7 Note: mixed pollination of red and lilac plants.
24-071 o.p. canadense7 Note: seed from several plants.
1 R. brachycarpum ssp. brachycarpum Surikogi originates from seed collected in the Japanese mountain Surikogi. See ARS SeedEx 2008-351.
2 R. smirnowii pollen was a gift from Kristian Theqvist, Finland
3 'Ben Nelson' is an easily cultivatable form of pseudochrysanthum and thought to be a hybrid.
4 bureavioides pollen was from an exceptionally hardy individual, a gift from Kristian Theqvist, Finland.
5 Hellikki is a hardy Finnish smirnowii hybrid.
6 Stern von Japan is degronianum ssp. yakushimanum Koichiro Wada x (Fabia Group x smirnowii), a compact hardy hydrid with spectacular hose-in-hose flowers.
7 Does not hybridize with other plants.
Tomasz Cyba, Poland
24-072 h.p. Belona X Allegretto Goal: low-growing hybrid with red flowers.
24-073 h.p. Belona X arboreum, red Goal: hardy arboreum hybrid with dense foliage and red flowers.
24-074 h.p. Schneekrone X Jersey Mammoth Goal: big-leaf rhododendron for zone 6A.
24-075 h.p. Schneekrone X macabeanum Goal: big-leaf rhododendron for zone 6B.
Erhard Moser, Germany
24-076 c.p. aberconwayi ex ZH-G 049
24-077 o.p. brachycarpum Note: compact trusses.
24-078 o.p. campanulatum ex Nepal
24-079 o.p. decorum ex KR7714
24-080 o.p. makinoi
24-081 o.p. platypodum
24-082 c.p. degronianum ssp. yakushimanum Edelweiss
Rick Edwards, Missouri USA
24-083 h.p. Annabella X Lollipop
24-084 c.w. arborescens Note: Late blooming.
24-085 o.p. colemanii
24-086 o.p. Elizabeth Lane
24-087 o.p. flammeum 'Hazel Hamilton'
24-088 o.p. Mt. Saint Helens
24-089 c.w. prinophyllum Note: Collected at Buffalo River, Ponca, AR.
24-090 o.p. sanctum
24-091 o.p. Satan
24-092 o.p. viscosum var montanum
Mike Oliver, Oregon USA
24-093 o.p. occidentale SM30 Note: Flowers almost all yellow. Most yellow occidentale flower known.
24-094 o.p. occidentale Note: Much yellow in flower
24-095 o.p. occidentale, unknown parent X (occidentale SM189 x occidentale SM232)
24-096 o.p. occidentale
Rhododendron Species Botanical Garden, Washington USA
24-097 h.p. campanulatum ssp. campanulatum 2008/467 x 1604d98
24-098 h.p. cinnabarinum ssp. xanthocodon
24-099 h.p. crinigerum 05/013 x 05/023
24-100 h.p. decorum
24-101 h.p. elliottii 05/209 x 88/081
24-102 h.p. exasperatum
24-103 h.p. faithiae
24-104 h.p. fulvum 02/442 x 91/088
24-105 h.p. glanduliferum
24-106 h.p. glischrum
24-107 h.p. hodgsonii
24-108 h.p. huanum
24-109 h.p. kiangsiense
24-110 h.p. liliiflorum
24-111 h.p. macabeanum CH
24-112 h.p. mallotum 97/125 x 66/557
24-113 h.p. molle ssp. japonicum
24-114 h.p. nipponicum
24-115 h.p. nipponicum RSF
24-116 h.p. polytrichum
24-117 h.p. quinquefolium
24-118 h.p. schlippenbachii (best pink)
24-119 h.p. semibarbatum
24-120 h.p. thomsonii
24-121 h.p. tephropeplum
24-122 h.p. wardii 74/246
24-123 h.p. wiltonii
Lloyd Gilmore, British Columbia Canada
24-124 h.p. [Champagne Lace x (Butter Brickle x Marie Stark)] X Four Winds
24-125 h.p. [Champagne Lace x (Butter Brickle x Marie Stark)] X self
24-126 h.p. (Jeda x sanguineum ssp. haemaleum)1 X Whid Bee
24-127 h.p. (Jeda x sanguineum ssp. haemaleum)1 X Cherries and Merlot
24-128 h.p. Mario Pagliarini X (decorum 732 Cox 2006 x Dexter’s Spice)
24-129 com. Erythronium revolutum, pink Note: From Loess Creek, west of Spooke, BC.
1 Temporary name for this cross is "Big Pot".
Ed Reekie, Ontario Canada
24-130 c.w. ferrugineum Note: Collected in Canton Graubunden, Switzerland.
24-131 c.w. hirsutum Note: Collected at 2,253 m elevation, Switzerland.
24-132 c.w. hirsutum Note: Collected at 2,182 m elevation, Switzerland.
24-133 h.p. (maximum x Wojnar’s Purple) X faithiae
24-134 h.p. Ribbon Candy X Leonard Frisbie
24-135 h.p. Ribbon Candy X molle ssp. japonicum
Bob Zimmerman, Washington USA
24-136 c.w. macrophyllum Note: Mt. Walker, Jefferson County WA.
24-137 h.p. moupinense, pink and red forms sibbed
24-138 h.p. occidentale 'Humboldt Picotee' X Leonard Frisbie
24-139 h.p. seinghkuense ex CCHH
24-140 h.p. sinofalconeri ex AC #
Jeff Thompson, Massachusetts, USA
24-141 o.p. Dorothy Swift
Richard Flavell, Connecticut USA
24-142 h.p. Babylon X Perfume Goal: fragrance.
24-143 h.p. (Golden Horseshoe x macabeanum) X lacteum
24-144 h.p. (Golden Horseshoe x macabeanum) X sinofalconeri SEH Note: Pollen from Mike Bones.
24-145 h.p. (smirnowii x sinogrande) X Laramie
24-146 h.p. (degronianum ssp. yakushimanum x falconeri) X [(catawbiense album x degronianum ssp. yakushimanum) x macabeanum]
Last four entries goal is big leaf hardy yellow.
Ron Rabideau, New Jersey USA
24-147 o.p. (Summer Joy1 X Very Berry)2 Goal: shuffle the genes to
potentially get some hardy tetraploids with big flowers and big thick leaves.
24-148 h.p. Jersey Mammoth3 X self Goal: Hardy, early blooming big-leaved plants.
24-149 h.p. Jersey Mammoth3 X faithiae
Goal: Large, textured leaves, mid-summer bloom,
colorful new growth, reasonably hardy.
1 Summer Joy is a tetraploid R. maximum from August Kehr. Name not registered.
2 Temporary name for this cross is 'Ron's #1". Probably selfed, if not, sibbed. (only two plants blooming)
3 Jersey Mammoth = brachycarpum ssp. tigerstedii x macabeanum
Ray Clack, Oregon USA
24-150 o.p. calendulaceum
24-151 o.p. Clear Creek
24-152 com. Eccremocarpus scaber Note: Chilean Glory Vine See https://plants.ces.ncsu.edu/plants/eccremocarpus-scaber/
Ron Rabideau, New Jersey USA
24-153 c.w. brachycarpum ssp. fauriei Note: From far eastern Russia.