Dva nové mezirodové křížence v čeledi Gesneriaceae - PDF

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Acta Mus. Richnov., Sect. natur. 19 (3-4): 49-54, (2012) 2012 MGOH Rychnov n. Kn., ISSN Dva nové mezirodové křížence v čeledi Gesneriaceae Two new intergeneric hybrids in the family Gesneriaceae

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Acta Mus. Richnov., Sect. natur. 19 (3-4): 49-54, (2012) 2012 MGOH Rychnov n. Kn., ISSN Dva nové mezirodové křížence v čeledi Gesneriaceae Two new intergeneric hybrids in the family Gesneriaceae Josef J. Halda Sedloňov 125, , Abstrakt: Příspěvek přináší popisy dvou dosud neznámých hybridů jankey a ramondy. První je zde popsán jako Jankaemonda x stibicii (Jankaea heldreichii x Ramonda nathaliae). Druhým popsaným taxonem je Jankaemonda x jurasekii, kříženec Jankaea heldreichii x Ramonda serbica. Klíčová slova: kříženci, Gesneriaceae, Jankaemonda, Jankaea, Ramonda Abstract: Two new intergeneric hybrids of Jankaea and Ramonda are given Jankaemonda x stibicii (Jankaea heldreichii x Ramonda nathaliae) and Jankaemonda x jurasekii, hybrid of Jankaea heldreichii x Ramonda serbica. Key words: hybrids, Gesneriaceae, Jankaemonda, Jankaea, Ramonda In the spring of 1973 I have received from the Geneva-based Aymon Correvon a plant named Jankaea vandedemii, resembling Jankaea heldreichii with almost globerose leaves, which later bloomed by lavender blue flowers, only shallowly campanulate ones. In response to my question on the origin of the plant he answered that he got it from Mr. Vandedem, Holland, who is supposedly also the author of this hybrid, the parents of which are Greek Jankaea heldreichii as the mother plant and the father is the Pyrenean Ramonda myconii. Due to the fact, that it was an intergeneric hybrid I have later described it as Jankaemonda x vandedemii Halda (Halda 1979). This hybrid has shown itself as a fairly easy plant. This plant can be propagated by divisions as well as leaf cuttings any time during vegetation. A. Correvon later gave me a true Jankaea heldreichii, Conandron ramondioides and Corallodiscus lanuginosus and so I could begin experimenting with more crossings. The others Balcan species as Haberlea rhodopensis or Ramonda nathaliae and R. serbica are frequently cultivated. I did cross the all of these species in different combinations and made many seedlings from which bloomed four plants, later described as four hybridogenic genera Jankaeberlea x panayotii Halda (Jankaea heldreichii x Haberlea rhodopensis), Jankaendron x stevensiae Halda (Jankaea heldreichii x Conandron ramondioides), Jankaessandra x bluemelii [Coracaea x blumelii (Halda) Feuillet in Taxon 42(1):106 (1993)] hybrid Jankaea heldreichii x Coralodiscus lanuginosus and fourth Ramberlea x kistlerae Halda, hybrid Ramonda myconii x Haberlea rhodopensis [Preslia 61(2):125 (1989)]. The all others several hundreds of sedlings died. Lately we can observe in the gardens new hybrids of Jankaea heldreichii and Balcan Ramondas since Jankaea is often cultivated in the vicinity of Ramondas, therefore many self-hybrids appeared. It is significant which of the two above is the mother-plant because the hybrids resemble the mother. At the beginning of the nineties of the previous century, Jaromír Stibic of Pardubice, has been intensively crossing Jankaea heldreichii with Ramonda nathaliae in his garden, the result of which were several plants where the mother plant was Jankaea. Only one of them subsisted in the culture, known as cultivar Jaromír Stibic. However, this combination is not identical with Jankaemonda x vandedemii and is henceforward described as Jankaemonda x stibicii. 50 Acta Mus. Richnov., Sect. natur. 19 (3-4): 49-54, (2012) 20 mm Fig. 1. Jankaemonda vandedemii Halda Fig. 2. Jankaemonda stibicii Halda The second unknown hybrid is Jankaemonda x jurasekii, hybrid of Jankaea heldreichii x Ramonda serbica. This hybrid has appeared independently in several Czech gardens at the break of the century. In each case these were self-hybrids originating in the vicinity of parents growing side by side, always resembling the mother-plant whether it was Jankaea or Ramonda. Jankaemonda x stibicii Halda hybr. nova. [Jankaea heldreichii Boiss. x Ramonda nathaliae Pančič & Petrovič] Planta inter parentes proxima, sempervirens, rosulata, compacta; folia omnia basalia elliptica vel subspathulata, integerrima, rugosa, multinervia, crassa, ca mm lata, mm longa, supra adpresse ± albolanata, subtu et basi densissime bruneo-lanata. Scapus erectus vel arcuato-erectus, ca 100 mm altus, 1-3 florus totus modice glandulosus. Calyx brevicampanulatus, 4-5 lobus. Corolla subcampanulata vel subrotata, lilacina, 4-5 loba, mm in diametro. Stamina plerumque 5, filamentis brevissimis. Capsula septicida, mm longa. Plant intermediate between both parents, evergreen, rosulate, compact; all leaves basal, elliptic or subspatulate, entire rugose, multinervous, more or less suculent, circa mm wide, mm long, upper surface adpressed ± white lanate, lower surface and base very shortly, brownish hairy. Scape erect or bented erect, cicra 100 mm tall, 1-3 flowered, glandulose. Calyx shortly campanulate, 4-5 lobed. Corolla subcampanulate or subrotate, lilac 4-5 lobed, across. Stamens mostly 5, filaments very short. Capsule septicid, mm long. HOLOTYPUS HIC DESIGNATUS: PR ; planta in horto in Sedloňov culta; leg. J. J. Halda, Cultivated plant, which seems to be a good ornamental plant. Jankaemonda x jurasekii Halda hybr. nova. [Jankaea heldreichii Boiss. x Ramonda serbica Pančič] Planta inter parentes proxima, sempervirens, rosulata, folia omnia basalia, elliptica vel rarius spathulata, integerrima, rugosa, multinervia, crassa, ca mm lata, mm longa, supra dense adpresse ± albolanata, subtus et basi densissime ferrugineo-lanata. Scapus erectus vel arcuato erectus, mm altus, ca 1-3 (5)-florus, totus modice glandulosus. Calyx Halda J. J.: Dva nové mezirodové křížence v čeledi Gesneriaceae 51 Tab. I. 1. Ramonda serbica Pančič, 2. R. nathaliae Pančič & Petrovič, 3. R. myconii (L.) Schultz 52 Acta Mus. Richnov., Sect. natur. 19 (3-4): 49-54, (2012) Tab. II. 4. Jankaea heldraichii Boiss., 5. Haberlea rhodopensis Friv., 6. Corallodiscus lanuginosus (Wallich ex R. Brown) B. L. Burtt, 7. Conandron ramondioides Sieb. & Zucc. Halda J. J.: Dva nové mezirodové křížence v čeledi Gesneriaceae 53 Tab. III. 1. Jankaeaberlea panayotii Halda, 2. x Jankaendron stevensiae Halda, 3. Coracaea bluemelii (Halda) Feuillet, 4. Ramberlea kistlerae Halda 54 Acta Mus. Richnov., Sect. natur. 19 (3-4): 49-54, (2012) ± campanulatus, 5 lobus. Corolla subcampanulata, lilacino-coerulea, 5 loba, mm in diametro, tubo ca 2 mm longo. Stamina plerumque 5, filamentis bravissimis. Capsula septicida, 10-15mm longa. Plant intermediate between both parents, evergreen, rosulate, compact; all leaves basal, elliptic or subspatulate, entire rugose, multinervous, more or less suculent, circa mm wide, mm long, upper surface adpressed ± white lanate, lower surface and base very shortly, rusty hairy. Scape erect or bented erect, cicra mm tall, 1-3 (5) flowered glandulose. Calyx shortly campanulate, 5 lobed. Corolla subcampanulate or subrotate, lilac 5 lobed, across. Stamens mostly 5, filaments very short. Capsule septicid, mm long. Cultivated plant, which seems to be a good ornamental plant. HOLOTYPUS HIC DESIGNATUS: PR ; planta in horto in Sedloňov culta; leg. J. J. Halda, In the culture, all the hybrids mentioned are much easider than the parents. They can easily grow in much the same conditions as haberleas or ramondas. Fig. 3. Jankaemonda jurasekii Halda Literature cited Feuillet C. (1993): Coracea Feuillet a new proposed name for Jankaessandra Halda. Taxon, 42(1): 106. Halda J. (1979): Dva nové mezirodové křížence v čeledi Gesneriaceae (Two new intergeneric hybrids in the family Gesneriaceae). Preslia, 51: Halda J. (1989): A new intergeneric hybrid in the family Gesneriaceae. Preslia, 61(2):
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