Lasianthus iteoides Valeton ex H.Zhu, 2012

61. Lasianthus iteoides Valeton ex H.Zhu View in CoL , sp. nov. — Fig. 18 View Fig

Similis L. hexandro Blume , sed lobis calycis triangulatis c. 1 mm longis aequalis tubo differt. —

Typus: Bünnemeijer 3578 ( holo L), Indonesia, Sumatra Barat, Malintang, Gunung , c. 1100 m alt., 18 July 1918 .

Shrub, c. 3 m high; branchlets terete, c. 1.5 mm diam, densely appressed hirsute. Leaves: blades lanceolate to oblong lanceolate, 6 –13 by 1.6 –3 cm, subcoriaceous, glabrous above except hirsute midrib, villose beneath; apex acute to acuminate, margin slightly recurved, base acute, midrib depressed above, prominent beneath, hirsute, nerves depressed and obscure above, prominent and conspicuous beneath, hirsute beneath, 7–8 pairs, ascending at an angle of 60–70°, curved to mar- gin, nervules obscure above, conspicuous beneath, villose, reticulate; petioles c. 5 mm long, densely appressed hirsute. Stipules triangular, 1 mm long, appressed hirsute. Inflorescences sessile; bracts inconspicuous. Flowers fascicular, sessile; calyx obconical, c. 2 mm long, densely villose, lobes 4–5, triangular, 1 mm long, villose both surfaces; corolla claviform when in bud, densely spreading villose, 6 –7 mm long, lobes triangular-oblong, c. 2 mm long; stamens with c. 0.8 mm long filaments; styles 5 mm long. Drupes globose, c. 5 mm diam, villose; pyrenes 5, smooth on the abaxial face.

Distribution — W Sumatra.

Habitat & Ecology — In forest between 100–1100 m altitude. Flowering in July; fruiting in September.

Additional specimens examined. Sumatra, Malintang, Bünnemeijer 3862 (L); Sumatra,Sago,Gunung, Bünnemeijer 3686 (L), Dayar Arbain DA399 (L).

Notes — This species is similar to L. hexandrus , but differs from the latter by having triangular calyx lobes, c. 1 mm long, as long as the calyx tube. Lasianthus hexandrus has lanceolate calyx lobes, 3–4 mm long, conspicuously longer than the tube. Valeton recognized the species as a new one, but did not made the description except a determination label on the type specimen. Here we described it as a new species.