Nepenthes ultra

Nepenthes ultra is a tropical pitcher plant native to the Philippine island of Luzon, where it grows at low altitude on ultramafic soils (hence the name).^[1]

Nepenthes ultra belongs to the informal "N. alata group",^[1] which also includes N. alata, N. ceciliae, N. copelandii, N. extincta, N. graciliflora, N. hamiguitanensis, N. kitanglad, N. kurata, N. leyte, N. mindanaoensis, N. negros, N. ramos, and N. saranganiensis.^[2]^[3]^[4] These species are united by a number of morphological characters, including winged petioles, lids with basal ridges on the lower surface (often elaborated into appendages), and upper pitchers that are usually broadest near the base.^[2]^[3]

References

1 2 3 Cheek, M. & M. Jebb 2013. Nepenthes ultra (Nepenthaceae), a new species from Luzon, Philippines. Blumea, published online on October 24, 2013. doi:10.3767/000651913X675124
1 2 Cheek, M. & M. Jebb 2013. Recircumscription of the Nepenthes alata group (Caryophyllales: Nepenthaceae), in the Philippines, with four new species. European Journal of Taxonomy 69: 1–23. doi:10.5852/ejt.2013.69
1 2 Cheek, M. & M. Jebb 2013. Typification and redelimitation of Nepenthes alata with notes on the N. alata group, and N. negros sp. nov. from the Philippines. Nordic Journal of Botany 31(5): 616–622. doi:10.1111/j.1756-1051.2012.00099.x
↑ Cheek, M. & M. Jebb 2013. Nepenthes ramos (Nepenthaceae), a new species from Mindanao, Philippines. Willdenowia 43(1): 107–111. doi:10.3372/wi.43.43112

Cheek, M. 2014. 12 new carnivorous plant species from the Philippines. Kew Science Blog, 20 January 2014.
Mey, F.S. 2013. Nepenthes ultra, yet another new species from the Philippines. Strange Fruits: A Garden's Chronicle, November 6, 2013.
Smith, L. 2014. Pitcher perfect - but carnivorous plants are at risk. The Independent, January 5, 2014.

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