Flora of Australia Online
Korthalsella emersa Barlow, Brunonia 6: 44 (1983); so named because its flowers are immersed in the floral cushion.
T: Lord Howe Island, M.M.J. van Balgooy 1037 ; holo: CANB n.v., fide B.A.Barlow, Brunonia 6: 44 (1983).
[Viscum opuntioides auct. non L.: C.Moore in E.S.Hill, Votes & Proc. Legislative Assembly New South Wales 2, 3 (1870)]
[Viscum distichum auct. non Endl.: C.Moore, J. Bot. 7: 303 (1869)]
[Viscum articulatum auct. non Burm.f.: F.J.H. von Mueller, Fragm. 9: 77 (1875); W.B.Hemsley, Ann. Bot. (London ) 10: 250 (1896); J.H.Maiden, Proc. Linn. Soc. New South Wales 23: 134 (1898)]
[Viscum opuntia auct. non Thunb.: K.Domin, Biblioth. Bot. 89: 50 (1921)]
[Korthalsella japonica auct. non (Thunb.) Engl.: S.W.L.Jacobs & J.Pickard, Pl. New South Wales 210 (1981); A.N.Rodd & J.Pickard, Cunninghamia 1: 274 (1983)]
Illustration: B.A.Barlow, Brunonia 6: 45, figs 27, 28 (1983).
Various host species have been recorded, including Elaeodendron curtipendulum Endl. and Jasminum simplicifolium G.Forst.
Plant to 15 cm tall. Stems with many nodes, yellowish green; branching at lower nodes, often with several branches at a node. Basal internode terete; next internode terete at base, flattened at apex; upper internodes flattened, broadly elliptic to elliptic, (5–) 15–25 mm long, (3–) 5–20 mm broad, attenuate at base, contracted at apex, often in same plane as each other; all internodes 3-veined, with central nerve more prominent. Flange from rudimentary leaves c. 0.5 mm high, not continuous around nodes. Flowers up to 30 in a cluster, immersed in floral cushion; hairs on cushion black-tipped. Fruit ellipsoidal, c. 1.5 mm long. Fig. 46A.
Lord Howe Is. Endemic.
L.H.Is.: Mt Eliza, A.C.Beauglehole 5512 (CANB, MEL); ridge between Old Settlement and North Bay, P.S.Green 1934 (K); Malabar, A.C.Beauglehole 6026 (CANB); SE end of Middle Beach Common, J.Pickard 1211 (NSW); s. loc. , 1873/74, J.P.Fullagar (K, MEL).
According to Barlow (Brunonia 6: 46 (1983)) this species is probably related to Korthalsella disticha of Norfolk Is.
Data derived from Flora of Australia Volume 49 (1994), a product of ABRS, ©Commonwealth of Australia