RAFFLESIA LAWANGENSIS (RAFFLESIACEAE), A NEW SPECIES FROM BUKIT LAWANG, GUNUNG LEUSER NATIONAL PARK, NORTH SUMATRA, INDONESIA

K. MAT -SALLEH (Herbarium UKMB, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600, Bangi, Selangor, Malaysia. (Born Kelantan, 1959 – Died Bangi, Malaysia, 10 Oct 2009))
RIDHA MAHYUNI (Herbarium Bogoriense, Botany Division, Research Centre for Biology—LIPI, Jl. Raya Jakarta—Bogor Km. 46, Cibinong 16911, Indonesia.)
AGUS SUSATYA (Department of Forestry, Universitas Bengkulu, Indonesia. Jl. Raya Kandang Limun, Bengkulu 38371, Indonesia.)
J.F. VELDKAMP (Netherland Centre for Biodiversity Naturalis (section National Herbarium of the Netherlands, NHN), Leiden University, PO Box 9514, 2300 Leiden, the Netherlands.)

REINWARDTIA
Vol 13, No 2 (2010): Vol. 13 No. 2

MAT-SALLEH, K., MAHYUNI, R., SUSATYA, A. & VELDKAMP, J. F. 2010. Rafflesia lawangensis (Rafflesiaceae), a new species from Bukit Lawang, Gunung Leuser National Park, North Sumatra, Indonesia. Reinwardtia 13(2): 159-165. - Rafflesia lawangensis (Rafflesiaceae), a new species from Bukit Lawang, Gunung Leuser National Park, North Sumatra is described. The species was previously recorded as either R. arnoldi or R. atjehensis, but it is distinguished by the absence of windows, the large undulating exterior annulus, the short pubescence on the upper surface of perigone lobes, and the very wide of diaphragm opening. A key to species of Sumatran Raffesia is provided.