Syzygium crystalliferum, tree
Syzygium crystalliferum. (Photos: Leonardo C. Udasco Jr. – leaves, flowers, tree; Jayson Mansibang – fruit)

In February 2024, the description of a new tree species from the Philippines was published in the Nordic Journal of Botany.

๐™Ž๐™ฎ๐™ฏ๐™ฎ๐™œ๐™ž๐™ช๐™ข ๐™˜๐™ง๐™ฎ๐™จ๐™ฉ๐™–๐™ก๐™ก๐™ž๐™›๐™š๐™ง๐™ช๐™ข

Distribution/habitat: Carranglan, Nueva Ecija, Luzon (specimens collected in 2021)

Endemic: Unknown/unconfirmed; known only from two small populations in Nueva Ecija

Distinctive traits: The ๐˜š. ๐˜ค๐˜ณ๐˜บ๐˜ด๐˜ต๐˜ข๐˜ญ๐˜ญ๐˜ช๐˜ง๐˜ฆ๐˜ณ๐˜ถ๐˜ฎ tree grows up to 12 meters tall, with a diameter of up to 20 cm at breast height, a smooth bark, and red sapwood. In some ways, it is similar to another Philippine ๐˜š๐˜บ๐˜ป๐˜บ๐˜จ๐˜ช๐˜ถ๐˜ฎ tree, ๐˜š. ๐˜ฑ๐˜ถ๐˜ณ๐˜ฑ๐˜ถ๐˜ณ๐˜ช๐˜ง๐˜ญ๐˜ฐ๐˜ณ๐˜ถ๐˜ฎ. They both sport leaves that grow directly from the stem (instead of on stalks or petioles) and have a heart-shaped (cordate) base, as well as large flowers and free perianth lobes. However, its leaves are leathery and firm, with a paperlike texture. It also has a shorter floral cup, as well as smaller calyx lobes. ๐˜š. ๐˜ค๐˜ณ๐˜บ๐˜ด๐˜ต๐˜ข๐˜ญ๐˜ญ๐˜ช๐˜ง๐˜ฆ๐˜ณ๐˜ถ๐˜ฎโ€™s most noteworthy characteristic, which makes it unique among all described ๐˜š๐˜บ๐˜ป๐˜บ๐˜จ๐˜ช๐˜ถ๐˜ฎ species in the Philippines, is the abundance of whitish blisters on its leaves and flowers. This is said to be the result of oxalate crystal deposition. Its flowers bloom between April and May; from July to August, ๐˜š. ๐˜ค๐˜ณ๐˜บ๐˜ด๐˜ต๐˜ข๐˜ญ๐˜ญ๐˜ช๐˜ง๐˜ฆ๐˜ณ๐˜ถ๐˜ฎ bears red fruits that turn deep purple as they ripen.

Conservation status: Critically Endangered

Described by: Leonardo Udasco Jr., Abigail Garrino, Jamie Ann Aumentado, Mark Gregory Rule, and Jayson Mansibang

Etymology: ๐˜š. ๐˜ค๐˜ณ๐˜บ๐˜ด๐˜ต๐˜ข๐˜ญ๐˜ญ๐˜ช๐˜ง๐˜ฆ๐˜ณ๐˜ถ๐˜ฎ derives its genus name from ๐˜ด๐˜บ๐˜ป๐˜บ๐˜จ๐˜ช๐˜ข (โ€œjoining together or conjunctionโ€ in Greek). Its species name, ๐˜ค๐˜ณ๐˜บ๐˜ด๐˜ต๐˜ข๐˜ญ๐˜ญ๐˜ช๐˜ง๐˜ฆ๐˜ณ๐˜ถ๐˜ฎ, is a combination of two Latin wordsโ€”๐˜ค๐˜ณ๐˜บ๐˜ด๐˜ต๐˜ข๐˜ญ๐˜ญ๐˜ฐ (crystal) and ๐˜ง๐˜ฆ๐˜ณ๐˜ฐ (to carry)โ€”inspired by its โ€œcrystal-carryingโ€ blisters.

Significance

๐˜š. ๐˜ค๐˜ณ๐˜บ๐˜ด๐˜ต๐˜ข๐˜ญ๐˜ญ๐˜ช๐˜ง๐˜ฆ๐˜ณ๐˜ถ๐˜ฎ marks the first new addition to the roster of known Philippine ๐˜š๐˜บ๐˜ป๐˜บ๐˜จ๐˜ช๐˜ถ๐˜ฎ species since 1951. The description of ๐˜š. ๐˜ค๐˜ณ๐˜บ๐˜ด๐˜ต๐˜ข๐˜ญ๐˜ญ๐˜ช๐˜ง๐˜ฆ๐˜ณ๐˜ถ๐˜ฎ – made possible through the collaborative efforts of the Philippine Taxonomic Initiative, Mindanao State University, and the University of the Philippines – is particularly significant, as there are gaps in our knowledge about ๐˜š๐˜บ๐˜ป๐˜บ๐˜จ๐˜ช๐˜ถ๐˜ฎ in the Philippines due to difficulties in conducting taxonomic studies. This is partly the result of different species evolving similar traits over time, despite not sharing a direct lineage (homoplasy). Crucially, ๐˜š. ๐˜ค๐˜ณ๐˜บ๐˜ด๐˜ต๐˜ข๐˜ญ๐˜ญ๐˜ช๐˜ง๐˜ฆ๐˜ณ๐˜ถ๐˜ฎ highlights the need to curb slash-and-burn farming (kaingin), timber poaching, and other threats to the environment related to human activity, especially in the Pantabangan-Carranglan Watershed Forest Reserve (PCWFR) where the tree was found.โ€”MF


Reference:

Mansibang, J.A., Udasco, L.C., Garrino, A.L., Ann M. Aumentado, J., Gregory Q. Rule, M. and Patykowski, J. (2024), Syzygium crystalliferum (Myrtaceae), a new tree species from Carranglan, Nueva Ecija, Philippines and lectotypification of Eugenia purpuriflora Elmer. Nordic Journal of Botany, 2024: e04227. https://doi.org/10.1111/njb.04227

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Author: Mikael Angelo Francisco

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