13. Hydnophytum grandifolium Valeton — Fig. 16

Hydnophytum grandifolium Valeton (1912b) 773. — Type: Gjellerup 226 (lectotype selected here L; iso BO), New Guinea, Papua Province, Jayapura .

Tuber large. Stems numerous, to 75 cm; thickened, internodes 2.5–10 by 0.4–0.7 cm. Leaves subsessile. Lamina broadelliptic; 12 by 7 to 24 by 16 cm; apex obtuse to subacuminate, base rounded; midrib broadening to base, prominent below, lateral nerves 7–9. Petiole 0–0.2 cm; stipules caducous. Inflorescence a pair, or up to 6 short, axillary peduncles to 1 by 0.4 cm. Flowers [1]?heterostylous. Calyx 1.5 mm, entire. Corolla tube 4 mm, with a band of hairs at mouth, lobes 4 mm, lanceolate. Anthers 3.7 mm, exserted. Stigma 2-fid, at mouth of tube. Fruit ellipsoid, 5.5 by 4.5 mm, red. Pyrenes obovateoblong, 4 by 2.5 mm; apex truncate, notched, with a central acute appendage 1.5 mm long; base truncate.

Ecology & Habitat — Epiphytic on Casuarina, 160 m. Tuber ant-inhabited.

Distribution — Indonesia (Papua Province).

Conservation status — Vulnerable (VU) under criteria D2 with only the type specimen known.

Note — Like a very big-leaved H. moseleyanum, but the inflorescences are more numerous, with up to 6 peduncles, and the anthers are much larger. While it is very similar to H. moseleyanum [14] it appears to be sympatric with that species and no intermediate forms have been collected.