Polyosma longebracteolata O.C.Schmidt

Paul, O. K., Conn, B. J. & Henwood, M. J., 2024, Taxonomic review of Polyosma (Escalloniaceae) in Papuasia, Blumea 69, pp. 54-88 : 79

20. Polyosma longebracteolata O.C.Schmidt

Polyosma longebracteolata O.C. Schmidt (1924) 149, f. 734;P. Royen (1983) 2518, f. 736. — Lectotype (designated here): H.J. Lam 1771 (lecto B [B10_0296082]; isolecto BO (n.v.), L [L 0035101]) ( Van Royen 1983)), Indonesia Papua, Jayapura, Nova Guinea neerlandica in reg. flum. Mamberamo (= Sungai Mamberamo), in monte ‘Doormantop (= Doorman Peak, Wonabunggame)’( Van Royen 1983), 27 Oct.1920 (see Typification below).

Typification — Since Schmidt (1924) did not assign a holotype, H. J. Lam

1771 (as held at B) is here designated as the lectotype.

Subalpine shrub. Branchlets densely hairy, hairs pale yellow, glabrescent. Leaves: petiole 0.4–0.8 cm long, glabrous; lamina oblong or obovate to spathulate, (1–)2–5 by (0.6–) 1–1.8 cm, coriaceous, with abaxial surface sparsely hairy with hairs pilose and adpressed on midrib and sometimes on lateral veins, adaxial surface glabrous; base narrowly cuneate, margin sub- revolute, usually entire, but often with 1 or 2 poorly developed teeth distally, apex obtuse to subacute; secondary veins 4–7 on each side and an angle greater than 45° from midrib, regularly looping or irregularly arching near margin onto the next secondary vein; tertiary veins weakly percurrent, glabrous, prominent on abaxial surface. Inflorescence racemose, terminal, rachis 3–3.5cm long (8–14-flowered), densely hairy with hairs golden yellow; flowers loosely arranged along rachis; pedicels 1–3 mm long; bracteoles 3–5 mm long, hairy. Calyx lobes 1–1.5 mm long. Corolla buds tubular, 10–15 mm long, yellowish; corolla remaining tubular at anthesis, with 4 small ovate lobes. Fruits not seen.

Distribution — Only known from two collections by H.J. Lam (Lam 1675 and 1771) from Doorman Peak (= Ngga Sem- banggela) ( Indonesia Papua, Tolikara Regency).

Habitat & Ecology — Presumably occurring in subalpine shrubberies, at elevation between 3 200–3 260 m.

Conservation status — Since this species is only known from a single location (Doorman Peak, Wonabunggame), it is possible that it is endangered.

Orthography — Without contradictory evidence, the prefix (‘longe’) of the specific epithet ( Schmidt 1924) is regarded as an adverb preceding an adjectival epithet (‘bracteolata’ – ‘brac- teola’ with the verbal suffix ‘-ate’), two words in apposition, and so does not need to be corrected ( Turland et al. 2018: Art. 60).

Additional specimen examined. INDONESIA, Papua, Jayapura,‘monte Doormantop (= Doorman Peak, Wonabunggame)’, Lam 1675 ( L) .

Note — Although this species is very inadequately known and has only been recorded from Indonesia Papua, it is likely to also occur in Papua New Guinea.