Syzygium foxworthianum (Ridl.) Merr. & L. M. Perry

Chantaranothai, Pranom, 2024, Notes on the genus Syzygium (Myrtaceae) from Cambodia, Thailand, Vietnam, China and Taiwan, PhytoKeys 244, pp. 151-161 : 151-161

Syzygium foxworthianum (Ridl.) Merr. & L. M. Perry , Mem. Mer. Acad. Arts 18: 168. 1939.

Eugenia foxworthyi Ridl. , Fl. Mal. Penins. 1: 728. 1922, non Elmer, 1912.

Eugenia foxworthiana Ridl. , Fl. Mal. Penins. 5: 308. 1925. Type: Peninsular Malaysia, Pahang, Bukit Goh Reserve, 12 Jan. 1920, Foxworthy Field No. 3624 (lectotype, designated by Chantaranothai and Parnell 1994, p. 63: K [K 001005521]).

Syzygium foxworthianum (Ridl.) Masam. , Enum. Phan. Born.: 528. 1942.

Eugenia densiflora Miq. var. angustifolia Ridl. , Fl. Mal. Penins. 1: 729. 1922. Type: Peninsular Malaysia, Perak, Ulu Temengoh, Ridley s. n. (lectotype, designated here: K [without barcode]).

Syzygium pycnanthum Merr. & L. M. Perry var. angustifolium (Ridl.) P. S. Ashton, Tree Fl Sabah & Sarawak 7: 270. 2011.

Type.

Based on Eugena foxworthiana Ridl.

Distribution.

Thailand, Peninsular Malaysia, Sumatra, Borneo, Vietnam (Lao Cai (Laokhay), Pakha, 10 Dec. 1935, Poilane 25052 (K).

Ecology.

In evergreen forest, 50–200 m alt.

Notes.

Ashton (2011) placed S. foxworthianum under S. pycnanthum ( Eugenia densiflora Miq. ) but I do not agree with this placement because the former differs from the latter by having a long and lax inflorescence (vs short and dense), slightly smaller and narrower leaves, 16–18.5 × 4–6.5 cm (vs larger and broader, 17.5–26 × 4.5–8.5 cm), two intramarginal veins, sometimes without the intramarginal vein and secondary veins ascending to a shallow loop (vs 2–3 intramarginal veins). Although the Vietnamese specimen Poilane 25052 (K), has young fruits, I found that it belongs to S. foxworthianum . Therefore, it is a new record of this species for Vietnam.

Eugenia densiflora var. angustifolia Ridl. was described based on two specimens from Peninsular Malaysia, Peak (Ridley s. n.) and Kelantan (Yapp s. n.). Ridley s. n. (K) is available and is designated here as the lectotype.