Brookea albicans Stapf (1894: 211)

Neo, Louise, Huurne, Suzanne Ter & Adema, Frits, 2019, A taxonomic revision of the genus Brookea (Plantaginaceae), Phytotaxa 403 (3), pp. 171-186 : 172-173

1. Brookea albicans Stapf (1894: 211) .

Type: — BORNEO. Sabah: Kinabalu, Penokok, 2500 ft, 1892, Haviland 1344 (lectotype K [ K000979568 ] here designated; isolectotypes K [ K000979569 ], SING [ SING0197240 ]) .

Small tree 2–5 m high. Twigs terete to angular, 5–12 mm diameter, densely stellate- to dendroid-hairy, glabrescent. Leaves ovate, 15.5–46 by 6.7–19.5 cm, index 2.3–3.0, base attenuate, ± decurrent along petiole, apex acute or acuminate, above dark green or blackish, with scattered stellate hairs, glabrescent, below densely stellate-hairy, midrib and nerves flat to sunken above, nerves 11–13 per side, 9–20 mm apart; petiole 0.5–3(–7.5) cm long, grooved, densely stellate hairy. Inflorescences 6–11 cm long, peduncle 1–2 cm long, densely stellate-hairy. Bracts narrowly ovate, recurved, 6–13 mm long, both sides densely stellate-hairy. Pedicels 5–13 mm long, densely stellate-hairy. Bracteoles linear, recurved, 2–5 mm long, densely stellate-hairy. Calyx tubular, 17–20 mm long, tube 15 mm long, 4- or 5-dentate, teeth of upper lip ± triangular, 3 by 3 mm, teeth of lower lip ovate, 3 by 2.5–5.0 mm; outside villous with stellate hairs, inside with very few unbranched hairs; in fruit slightly larger, more globose and torn. Corolla light yellow, keels slightly darker, 15–30 mm long, tube 13–20 mm long, curved, upper lip semicircular, 6 by 8–10 mm, slightly notched, lateral lobes of lower lip broadly ovate, 10 by 5 mm, median lobe of lower lip spathulate, 10 by 5 mm; outside upper part of tube and lips densely stellate hairy, inside with some unbranched hairs in lower part. Stamens: short filaments 7–8 mm long, long filaments 10–11 mm long, with some unbranched hairs in lower part; anthers 1.8–2.3 by 1.2–1.5 mm, glabrous; staminode absent. Ovary ovoid, 6 by 3 cm, glabrous; style 11 mm long, glabrous; stigmas broadly elliptic, 3 by 2 mm, glabrous. Fruits globose, green, 9–10 by 6–8 mm, glabrous. Seeds disc-like, 0.4–0.5 by 0.4–0.5 mm, very narrowly winged, pitted.

Distribution: —Borneo: Sabah (Crocker Range, Mount Kinabalu, Penampang, Trus Madi Forest Reserve), Sarawak (Limbang). Sulawesi: South Sulawesi (Todjambu), Southeast Sulawesi (North Kolaka) ( Fig. 1 ).

Habitat: —Oak-laurel forest on Crocker Formation (Beaman et al. 10497), lower montane forest, secondary vegetation along roads. Soil: ultrabasic (SAN 147520). Elevation: 1100–1800 m.

Phenology: —Flowering: March, July, September, November, December; fruiting: February, July, September, December.

Notes: —One of the leaves of a pair may be smaller. The leaf margin is more clearly dentate than that of B. tomentosa .

Additional specimens examined: — BORNEO. MALAYSIA. Sabah: Kundasang, Mount Kinabalu, Tenompok , 5000 ft, 18 Feb. 1932, Clemens & Clemens 28469 ( BO, L) ; Penampang, en route from Agr Exp Station to Sungai Kalangaan and Kampung Tagudon , Mount Alab , 1100–1500 m, 13 Dec. 1968, Kokawa & Hotta 2106 ( L), Crocker Range Forest Reserve , 5°51’5”N, 116°19’7”E, 1571 m, 18 May. 2011, Suzana SAN 153840 ( SAR, SING), km 495 on Kota Kinabalu-Tambuan road, 5°50’N, 116°20’E, 1350–1500 m, 3 Jul. 1984, Beaman et al. 10497 ( L), km 45 Tunggul Penampang-Tambunan road, 12 Sep. 1991, Mantor SAN 131366 ( L, SAR), Tunggol Forest Reserve , km 45 Jalan Kota Kinabalu, 19 Jul. 1986, Mantor SAN 114604 ( L, SAR) ; Tambunan, Crocker range, near Tambunan-Penampang road, 2 Mar. 1995, Sugau JBS 54 ( L), Gunung Trusmadi , 13 Aug. 1988, Mantor SAN 125479 ( L), 4720 ft, 7 Mar. 1995, Sugau JBS 124 ( L, SAR). Sarawak: Limbang, 30 Apr. 2002, Yahud et al. S 88116 ( L). SULAWESI. South Sulawesi: West Wara , Todjamboe , 21 Jan. 1929, Kjellberg 1689 ( BO). South East Sulawesi: North Kolaka , district Rante Angin , subdistrict Tinukari , village Mekongga , mountainous range, on the way to top mountains, Hura-hura , 3°38’17.16”S, 121°11’35.2”E, 28 Nov. 2010, Widjaja & Suyadi EAW 9418 ( BO, L) .

Figures

FIGURE 1. The distribution of B. albicans (white diamond ◊), B. celebica (black diamond ♦) and B. linduensis (white triangle ∆). Grey shaded areas are 1000 m and above in elevation.