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Jonjing (Rhynchoglossum obliquum)

Dlium Jonjing (Rhynchoglossum obliquum)

Jonjing (Rhynchoglossum obliquum) is a plant species in Gesneriaceae, annuals, 5-75 cm high, bald stems, slightly transparent green, has a purple ring boundary where one or two petioles grow, 0.5-1.5 cm long petiole and green.

R. obliquum has alternately arranged leaves, asymmetrical, one side is elliptical and the other side is ovoid, 4-12 cm long, 2-6 cm wide, rounded base, pointed tip, a curved main bone, pinned minor bones, the entire surface is choppy and green.





Small flowers lined for 10-30 florets in stems up to 12 cm long. Flowers have 2-5.5 cm stems and hairy. The petals are often blue, 3-8 mm, three lobes for 1-3 mm, corolla dark purple or blue and 8-11 mm long. Stamens for two strands, anthers 1 mm in size and almost parallel, pistils for 6.5 mm and hairy.

The flowering season in February-May, grows wild in shady places around waterways, rivers, cliffs in the forest, forest boundaries and around caves, altitude 100-2800 m and sometimes used as ornamental plants in pots and house yards for uniqueness leaf.

TAXON

Kingdom: Plantae
Phylum: Tracheophyta
Subphylum: Angiospermae
Class: Magnoliopsida
Order: Lamiales
Family: Gesneriaceae
Subfamily: Cyrtandroideae
Tribe: Klugieae
Subtribe: Loxotidinae
Genus: Rhynchoglossum Blume in Bijdr. Fl. Ned. Ind.: 741 (1826)
Species: Rhynchoglossum obliquum Blume in Bijdr. Fl. Ned. Ind.: 741 (1826)

HOMOTYPIC SYNONYMS

Rhynchoglossum blumei A.DC. in A.P.de Candolle, Prodr. 9: 274 (1845)

HETEROTYPIC SYNONYMS

Antonia obliqua (Wall.) R.Br. in N.Wallich, Pl. Asiat. Rar. 3: 65 (1832)
Loxotis intermedia Benth. in Scroph. Ind.: 57 (1835)
Loxotis obliqua (Wall.) R.Br. in J.J.Bennett, Pl. Jav. Rar.: 102 (1838)
Rhynchoglossum hologlossum Hayata in Icon. Pl. Formosan. 5: 131 (1915)
Rhynchoglossum obliquum (Wall.) A.DC. (1845)
Rhynchoglossum obliquum var. hologlossum (Hayata) W.T.Wang in Bull. Bot. Res., Harbin 4(1): 31 (1984)
Rhynchoglossum obliquum var. intermedium (Benth.) A.DC. (1845)
Rhynchoglossum obliquum var. parviflorum C.B.Clarke in A.L.P.P.de Candolle & A.C.P.de Candolle, Monogr. Phan. 5: 162 (1883)
Rhynchoglossum papuae Schltr. in Bot. Jahrb. Syst. 58: 299 (1923)
Rhynchoglossum rheedei A.DC. (1845)
Rhynchoglossum zeylanicum Hook. in Bot. Mag. 71: t. 4198 (1845)
Paederota obliqua A.Dietr. in Sp. Pl., ed. 6. 1: 563 (1831)
Wulfenia intermedia Wall. in Numer. List: n.° 408 (1829)
Wulfenia obliqua Wall. in Tent. Fl. Napal. 2: 45, t. 35 (1826)

PUBLICATIONS

Grierson, A.J.C. & Long, D.G. (2001). Flora of Bhutan 2: 1-1675. Royal Botanic Gardens, Edinburgh.

Kartonegoro, A. & Potter, D. (2014). The Gesneriaceae of Sulawesi VI: The species from Mekongga Mts. with a new species of Cyrtandra described. Reinwardtia 14: 1-11.

Kartonegoro, A. (2013). A revision of Rhynchoglossum (Gesneriaceae) in Malesia. Reinwardtia 13: 421-432.

Kress, W.J., DeFilipps, R.A., Farr, E. & Kyi, D.Y.Y. (2003). A Checklist of the Trees, Shrubs, Herbs and Climbers of Myanmar. Contributions from the United States National Herbarium 45: 1-590. Smithsonian Institution.

Mukherjee, A., Banerjee, D. & Acharya, J. (2008). A contribution to the study of Gesneriaceae Dum. in the eastern Himalaya. Pleione 2: 151-161.

Pasha, M.K. & Uddin, S.B. (2013). Dictionary of plant names of Bangladesh, Vasc. Pl.: 1-434. Janokalyan Prokashani, Chittagong, Bangladesh.

Phương, V.X. (2017). Thực Vật Chí Việt Nam. Flora of Vietnam 18: 1-416. Nhà xuất bản khoa học và kỹ thuật, Hà Nội.

Rajbhandari, K.R., Rai, S.K. & Chhetri, R. (2022). A Handbook of the Flowering Plants of Nepal 4: 1-522. Department of Plant Resources, Thapathali, Kathmandu, Nepal.

Sinha, B.K. & Datta, S. (2016). Taxonomic account on the family Gesneriaceaein Northeast India. Nelumbo 58: 1-43.

Turner, I.M. (1995). A catalogue of the Vascular Plants of Malaya. Gardens' Bulletin Singapore 47(1): 1-346.

Wiriadinata, H., Girmansyah, D., Hunter, J.M., Hoover, W.S. & Kartawinata, K. (2013). Floristic study of West Sumbawa, Indonesia. Reinwardtia 13: 391-404.

Z.Wu & P.H.Raven (eds.) (1998). Flora of China 18: 1-449. Science Press (Beijing) & Missouri Botanical Garden Press (St. Louis).

Zheng, Z.L., Wang, F.G., Tian, H.Z. & Xing, F.W. (2008). Two genera of Gesneriaceae newly recorded from Hainan province. Journal of Tropical and Subtropical Botany 16: 571-572.

VERNACULAR NAME

English: Jonjing
Indonesia: Jonjing
Java: Jonjing

Aryo Bandoro
Dlium TheDlium
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