Alpenrose Rhododendron ferrugineum, copyright Ghislain118.

Belongs within: Ericaceae.

The Rhodoreae are a group of shrubs and small trees bearing more or less zygomorphic flowers, often with spots or blotches on the petals (Kron et al. 2002).

Characters (from Kron et al. 2002): Shrubs or small trees. Leaves evergreen or deciduous, alternate, non-ericoid, entire to serrulate-ciliate, convolute or revolute in bud. Leaf epidermal cells not lignified. Indumentum very variable, sometimes glandular, peltate, or highly branched. Inflorescence terminal or rarely axillary, usually corymbose or umbellate; bracts present, usually as perulae (except Therorhodion where bracts are green), bracteoles paired, usually more or less basal; calyx articulated with pedicel or not. Flowers usually 4- or 5-merous, slightly zygomorphic, but occasionally secondarily actinomorphic. Calyx lobes variably developed, persistent or deciduous; corolla usually sympetalous, variously shaped, often with spots or blotches, the lobes usually moderate to large; stamens 5–15, included or exserted, the filaments straight to curved, unicellular-pubescent or smooth; anthers smooth, lacking spurs, dehiscing by terminal pores to elongate slits. Pollen with viscin threads. Ovary 3–14-locular, with axile placentation, superior; style impressed or not; stigma truncate or expanded. Fruit an ovoid to cylindric septicidal capsule; seeds with testa cells usually elongated; embryo with 2 cotyledons.

    |--Therorhodion camtschaticum KJ02
    `--+--Diplarche multiflora KJ02
       |--Tsusiophyllum KJ02
       |--Menziesia KJ02
       |    |--M. ciliicalyx KJ02
       |    |--M. ferruginea H93
       |    |--M. lasiophylla KJ02
       |    `--M. pilosa KJ02
       `--Rhododendron [incl. Rhodora] KJ02
            |--R. acuminatum P88
            |--R. afghanicum H03
            |--R. albiflorum KJ02
            |--R. alborugosum H03
            |--R. anagalliflorum H03
            |--R. anthopogon SN88
            |    |--R. a. var. anthopogon O88
            |    `--R. a. var. hypenanthum O88
            |--R. arboreum P05
            |    |--R. a. ssp. arboreum RR02
            |    |--R. a. ssp. cinnamomeum SN88
            |    `--R. a. ssp. nilagirieum RR02
            |--R. arfakianum H03
            |--R. atropurpureum H03
            |--R. baconii H03
            |--R. barbatum SN88
            |--R. borneensis H03
            |--R. brassii H03
            |--R. brookeanum H03
            |    |--R. b. var. brookeanum H03
            |    |--R. b. var. cockburnii H03
            |    |--R. b. var. gracile H03
            |    |--R. b. var. kinabaluense H03
            |    `--R. b. var. moultonii H03
            |--R. burttii H03
            |--R. buxifolium H03
            |--R. caespitosum H03
            |--R. caliginis H03
            |--R. calostrotum H03
            |--R. campanulatum SN88
            |    |--R. c. var. campanulatum SN88
            |    `--R. c. var. wallichii SN88
            |--R. canadense H03
            |--R. canescens KJ02
            |--R. capellae H03
            |--R. catawbiense D59
            |--R. christianae H03
            |--R. culminicolum H03
            |    |--R. c. var. culminicolum H03
            |    `--R. c. var. angiense H03
            |--R. cuneifolium H03
            |--R. cuspidellum H03
            |--R. dalhousiae SN88
            |--R. degronianum [incl. R. metternichii] LO98
            |--R. edgeworthii KJ02
            |--R. ericoides H03
            |--R. falconeri KJ02
            |--R. farrerae KJ02
            |--R. ferrugineum H03
            |--R. flavum G98
            |--R. floccigerum H03
            |--R. forrestii H03
            |--R. fulgens O88
            |--R. gracilentum KJ02
            |--R. grande KJ02
            |--R. groenlandicum KJ02
            |--R. heptaster H03
            |--R. herzogii H03
            |--R. hippophaeoides KJ02
            |--R. hirsutum H03
            |--R. hodgesonii SN88
            |--R. hongkongense KJ02
            |--R. hooglandii H03
            |--R. hypoleucum KJ02
            |--R. incommodum H03
            |--R. inconspicuum H03
            |--R. jasminiflorum H03
            |--R. javanicum H03
            |--R. kaempferi KJ02 [=R. obtusum var. kaempferi LO98]
            |--R. keiskei A80
            |--R. kiusianum KJ02
            |--R. lamrialianum H03
            |--R. lapponicum RJ11
            |--R. lateritium BBO02
            |--R. lepidotum SN88
            |    |--R. l. var. lepidotum O88
            |    |--R. l. var. elaeagnoides O88
            |    `--R. l. var. obovatum O88
            |--R. leucogigas H03
            |--R. lochiae H03
            |--R. longiflorum H03
            |--R. loranthiflorum H03
            |    |--R. l. var. loranthiflorum H03
            |    `--R. l. var. lakekamuensis H03
            |--R. lowndesii O88
            |--R. macgregoriae H03
            |--R. macrophyllum H93
            |--R. madulidii H03
            |--R. malayanum P88
            |--R. maximum KJ02
            |--R. meijeri H03
            |--R. minus KJ02
            |--R. molle KJ02
            |--R. moulmainense P88
            |--R. mucronatum MH98
            |--R. myrtifolium H09
            |--R. nieuwenhuisii H03
            |--R. nivale O88
            |--R. obtusum MH98
            |--R. occidentale H93
            |--R. oomurasaki MH98
            |--R. ovatum KJ02
            |--R. pendulum KJ02
            |--R. pentaphyllum LO98
            |    |--R. p. var. pentaphyllum LO98
            |    `--R. p. var. nikoense LO98
            |--R. periclymenoides KJ02
            |--R. ponticum G98
            |--R. primuliflorum H03
            |--R. prinophyllum G96
            |--R. pumilum O88
            |--R. quadrasiamum H03
            |--R. reticulatum BBO02
            |--R. retusum H03
            |--R. rex H03
            |--R. roseiflorum H03
            |--R. rousei H03
            |--R. rubineiflorum H03
            |--R. sanguineum H03
            |--R. sarcodes H03
            |--R. saxifragoides H03
            |--R. schlechteri H03
            |--R. semibarbatum KJ02
            |--R. setosum SN88
            |--R. simsii H03
            |--R. sleumeri H03
            |--R. stamineum KJ02
            |--R. stapfianum H03
            |--R. stenophyllum H03
            |--R. taxoides H03
            |--R. tomentosum KJ02
            |--R. triflorum SN88
            |--R. truncicolum H03
            |--R. tsusiophyllum KJ02
            |--R. tuhanensis H03
            |--R. vaccinioides P05
            |--R. vanvuurenii H03
            |--R. variolosum H03
            |--R. venator H03
            |--R. virgatum KJ02
            |--R. vitis-idaea H03
            |--R. wightii O88
            |--R. womersleyi H03
            |--R. yongii H03
            `--R. zoelleri H03

*Type species of generic name indicated


[A80] Aoki, J. 1980. A revision of the oribatid mites of Japan. I. The families Phthiracaridae and Oribotritiidae. Bulletin of the Institute of Environmental Science and Technology, Yokohama National University 6 (2): 1–89.

[BBO02] Begerow, D., R. Bauer & F. Oberwinkler. 2002. The Exobasidiales: an evolutionary hypothesis. Mycological Progress 1 (2): 187–199.

[D59] Darwin, C. 1859. The Origin of Species by Means of Natural Selection, or the preservation of favoured races in the struggle for life 1st ed. John Murray: London.

[G96] Gagné, R. J. 1996. A new species of Dasineura (Diptera: Cecidomyiidae) infesting pinxterbloom azalea flowers in Maryland and Washington, D.C. Proceedings of the Entomological Society of Washington 98 (2): 228–232.

[G98] Gruber, J. 1998. Beiträge zur Systematik der Gattung Dicranolasma (Arachnida: Opiliones, Dicranolasmatidae). I. Dicranolasma thracium Staręga und verwandte Formen aus Südosteuropa und Südwestasien. Annalen des Naturhistorischen Museum in Wien. Serie B. Botanik und Zoologie 100: 489–537.

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[H93] Hickman, J. C. (ed.) 1993. The Jepson Manual: Higher Plants of California. University of California Press: Berkeley (California).

[KJ02] Kron, K. A., W. S. Judd, P. F. Stevens, D. M. Crayn, A. A. Anderberg, P. A. Gadek, C. J. Quinn & J. L. Luteyn. 2002. Phylogenetic classification of Ericaceae: molecular and morphological evidence. Botanical Review 68: 335–423.

[LO98] Lack, H. W., & H. Ohba. 1998. Die Xylothek des Chikusai Kato. Willdenowia 28: 263–276.

[MH98] Morikawa, H., A. Higaki, M. Nohno, M. Takahashi, M. Kamada, M. Nakata, G. Toyohara, Y. Okamura, K. Matsui, S. Kitani, K. Fujita, K. Irifune & N. Goshima. 1998. More than a 600-fold variation in nitrogen dioxide assimilation among 217 plant taxa. Plant, Cell and Environment 21: 180–190.

[O88] Ohba, H. 1988. The alpine flora of the Nepal Himalayas: an introductory note. In: Ohba, H., & S. B. Malla (eds) The Himalayan Plants vol. 1. The University Museum, University of Tokyo, Bulletin 31: 19–46.

[P05] Panda, S. 2005. Gaultheria brevistipes (C.Y. Wu & T.Z. Hsu) R.C. Fang (Ericaceae)—a new record for India from Talle Valley, Arunachal Pradesh. Bulletin of the Botanical Survey of India 47: 177–182.

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[RJ11] Rising, J. D., A. Jaramillo, J. L. Copete, P. G. Ryan & S. C. Madge. 2011. Family Emberizidae (buntings and New World sparrows). In: Hoyo, J. del, A. Elliott & D. A. Christie (eds) Handbook of the Birds of the World vol. 16. Tanagers to New World Blackbirds pp. 428–683. Lynx Edicions: Barcelona.

[SN88] Suzuki, M., & S. Noshiro. 1988. Wood structure of Himalayan plants. In: Ohba, H., & S. B. Malla (eds) The Himalayan Plants vol. 1. The University Museum, University of Tokyo, Bulletin 31: 341–379.

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