Rhododendron jaVanicum (Blume) Benn., Pl. Jav. Rar.

Mambrasar, Yasper Michael, Warseno, Tri, Kuswantoro, Farid & Arifiani, Deby, 2024, NOTES ON RHODODENDRON (ERICACEAE) FROM BALI, INDONESIA, AND A NEW SUBSPECIES OF RHODODENDRON JAVANICUM, Edinburgh Journal of Botany 81 (1962), pp. 1-11 : 3-4

publication ID	https://doi.org/10.24823/EJB.2024.1962
persistent identifier	https://treatment.plazi.org/id/03D70D00-5421-FFD5-4219-F9A2FE3A72E6
treatment provided by	Felipe
scientific name	Rhododendron jaVanicum (Blume) Benn., Pl. Jav. Rar.
status

Treatment

2. Rhododendron jaVanicum (Blume) Benn., Pl. Jav. Rar. View in CoL [Bennett] 85 (1838), excl. t. 19,

which is R. var. teysmanii fide Sleumer (1966). Vireya javanica Blume, Bijdr. Fl. Ned. Ind. : 854 (1826). – Type: Mt Salak, 800–2215 m, Blume s.n. [leg. Zippel?] (holotype

L, U).

Azalea javanica (Blume) Kuntze, Revis. Gen. Pl. View in CoL 2: 386 (1891). – Type: Indonesia, Java, Sindanglaja. Leg. Ign. s.n. (BO).

subsp. javanicum View in CoL

Shrub or tree, growing up to 5 m. Twigs 3–6 mm in diameter, scaly when young; internodes 20–160 mm. Leaves 3- to 7-clustered in tight pseudowhorls but sometimes with odd leaves along stems, 30–120 × 14–44 mm, narrowly elliptic or elliptic-ovate, apex shortly acuminate or acute, margin entire, flat, base tapering; scaly beneath leaves. Scales flat, small, dendroid and scattered. Petiole 5–11 × 2–4 mm, brown or red, scaly. Flowers 4–12 in each open umbel, semipendent. Pedicels 15–24 mm, scaly. Corolla 30–50 mm long, 70–80 mm in diameter, funnel-shaped, orange with red or rarely yellow, glabrous but occasionally scaly outside and hairy inside. Stamens hairy, anthers 2.5–4 × c. 1.3 mm, oblong. Ovary 7–9 ×

c. 3 mm, scales sparse or absent, style glabrous, 20–30 mm long. Fruit 30–60 × 9 mm, fusiform.

Distribution. Sumatra, Natuna Islands, Lingga Archipelago, Java and Bali (Mount Batukaru).

Habitat and ecology. Terrestrial in montane forests, c. 1360 m a.s.l.

Proposed IUCN conservation category (Bali). Globally assessed as Least Concern (LC) by Argent (2015). In Bali, it is known only from Mount Batukaru, an area proposed as a nature reserve by the Indonesian Ministry of Environment and Forestry ( Putri, 2012; KSDA Bali, 2019). In addition, the mountain is a popular area for climbers and as a place of worship for Balinese Hindus. The restricted, potentially small population, and plausible future threats from human activities, suggest a provisional assessment of Vulnerable (VU) D2 (IUCN Standards and Petitions Subcommittee, 2022).

Additional specimens examined. INDONESIA. Bali: Mt Batoe Karoe [Mt Batukaru], 1360 m, 11 x 1918, R. Maier & Sarip 396 ( BO) ; Bali, Bedugul forest region, Mt Batukaru complex, 23 vi 1958, Kostermans, Kuswata, Soegeng, Soepadmo 84 ( BO) .