regional-scale food web structure in Nepenthes alata pitchers. Biotropica 30(1): 82–91. Syamsuardi & R. Tamin 1994. Kajian kekerabatan jenis-jenis Nepenthes di Sumatera Barat. Project report, Andalas University, Padang. Abstract Syamsuardi 1995. Klasifikasi numerik kantong semar (Nepenthes) di Sumatera Barat. [Numerical classification of pitcher plants (Nepenthes) in West Sumatra.] Journal Matematika dan Pengetahuan Alam 4(1): 48–57. Abstract Thornhill, A.H., I.S. Harper & N.D. Hallam 2008. The development of the digestive glands and enzymes in the pitchers of three Nepenthes species: N. alata, N. tobaica, and N. ventricosa (Nepenthaceae). International Journal of Plant Sciences 169(5): 615–624. Uy, B.D. 1990. The granchina Nepenthes of the Philippines in retrospect. Carnivorous Plant Newsletter 19(1–2): 18–19. Wu, X., J. Li, Q. Zhong & X. Wu 2005. 猪笼草组培快繁技术. [Tissue culture and fast propagation in Nepenthes alata.] Nonwood Forest Research 23(4): 48–50. External links Photographs of N. alata at the Carnivorous Plant Photofinder Carnivorous plants of Asia alata Endemic flora of the Philippines Plants described in 1837 Taxa named by Francisco Manuel Blanco