Psychotria ngotphamii Bao, Tagane, Yahara & V. S. Dang 2023, sp. nov.

Psychotria ngotphamii Bao, Tagane, Yahara & V.S.Dang, sp. nov. (Figures 1, 2) TYPE:— VIETNAM. Lam Dong Province, Bi Doup-Nui Ba National Park, in evergreen forests, 12°10′26.91″N, 108°41′53.94″E, 1490 m elevation, 19 Nov 2014, Tagane S., Toyoma H., Dang V.S., Nagamasu H., Naiki A., Tran H., Yang C.J., Cuong, N.Q., Hieu H.N.P., Loi X.N. V1850 (holotype VNM [VNM00042784!]; isotypes FU!, VNM [VNM00042782!, VNM00042783!]). Diagnosis: — Psychotria ngotphamii is similar to P. bonii Pitard (1924: 347) of Vietnam and Thailand in having an entirely glabrous plant body except some floral parts, similar leaf shape, cymose inflorescences, and similar fruits shape. However, it differs in having smaller stipules (1.5–2 mm long in P. ngotphamii vs. 3–8 mm long in P. bonii), smaller leaf blades (2.5–6.5 × 1–2.5 cm vs. 5.5–18.3 × 2.5–6.3 cm), shorter petioles (5–7 mm long vs. 15–35 mm long), longer calyx lobes (0.5–0.8 mm long vs. 0.3–0.5 mm long), longer corolla lobes (1.2–1.4 mm long vs. 0.7–1 mm long), and larger fruits (8–10 mm long vs. 7–8 mm). Shrubs 0.5–1 m tall. Current year twigs dark green in vivo, glabrous, old twig brownish-grey in vivo, dark brown in sicco, stems cylindrical, internodes 0.2−0.9 cm long. Stipules ovate-triangular, 1.5−2 mm long, green in vivo, dark brown in sicco, glabrous on both sides, connate at base, apex rounded, margin entire, outer surface with two setae at the base over topping the apex of stipule, setae filiform, ca. 1 mm long, margin ciliolate. Leaves simple, oppositedecussate, petiolate; lamina elliptic-oblong or obovate-oblanceolate, 2.5−6.5 × 1−2.5 cm, adaxially dark green in vivo, abaxially light green in vivo, glabrous on both sides, base acute, apex acute to acuminate, margin entire, venation mixed brochidodromous, midrib prominent on both sides, secondary veins 5−8 pairs, prominent abaxially, without domatia; petioles 5−7 mm long, glabrous. Inflorescences terminal or axillary on new branches, trichotomous, peduncles 1−2.3 cm long, secondary axes 0.4−1.1 cm long, greenish-white in ...