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''Nepenthes rigidifolia'' is a tropical pitcher plant endemic to Sumatra, where it grows at elevations of 1000–1600 m above sea level.〔McPherson, S.R. 2009. ''Pitcher Plants of the Old World''. 2 volumes. Redfern Natural History Productions, Poole.〕 The specific epithet ''rigidifolia'' is formed from the Latin words ''rigidus'' (rigid) and ''folia'' (leaves), and refers to the plant's stiff, coriaceous leaf blades.〔 ''Tahul-tahul'' has been recorded as a local vernacular name for this species.〔 ==Botanical history== ''Nepenthes rigidifolia'' was discovered by Ch'ien Lee some time before 2001.〔 The species was mentioned as an undescribed taxon in Charles Clarke's 2001 book, ''Nepenthes of Sumatra and Peninsular Malaysia'', under the name "''Nepenthes'' species A".〔 At the time, it was recorded as growing at an elevation of around 1600 m.〔 In 2004, Ch'ien Lee informally named the species ''N. alpicola'' and later ''N. aptera''. Cultivated plants were sold under both of these names. Although intended to become scientific names, they were never published with an adequate description and are thus considered ''nomina nuda''.〔Schlauer, J. N.d. (''Nepenthes rigidifolia'' ). Carnivorous Plant Database.〕 Instead, the species was formally described later that year as ''N. rigidifolia'' by Pitra Akhriadi, Hernawati, and Rusjdi Tamin.〔 The description was published on November 22, 2004.〔(''Nepenthes rigidifolia'' Akhriadi, Hernawati & Tamin ). International Plant Names Index (IPNI).〕 Two years later, Hernawati and Akhriadi covered the species in their book, ''A Field Guide to the Nepenthes of Sumatra'', and assessed its conservation status.〔Hernawati & P. Akhriadi 2006. ''A Field Guide to the Nepenthes of Sumatra''. PILI-NGO Movement, Bogor.〕 The holotype of ''N. rigidifolia''—''Nepenthes Team (Hernawati, P. Akhriadi & I. Petra) NP 354''—was collected on December 11, 2003, near Sidikalang in Karo Regency, North Sumatra, at an elevation of 1000–1500 m. It is deposited at the Herbarium Universitas Andalas (ANDA) of Andalas University in Padang, West Sumatra. An isotype is held at Herbarium Bogoriense (BO) in Java.〔 Stewart McPherson observed ''N. rigidifolia'' at the type locality in 2007 and published an updated description of the species in his 2009 monograph, ''Pitcher Plants of the Old World''.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Nepenthes rigidifolia」の詳細全文を読む スポンサード リンク
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