Conamomum vietnamense N. S. Ly & T. S. Hoang 2022, sp. nov.

Conamomum vietnamense N.S.Lý & T.S. Hoang, sp. nov. (Fig.1) Diagnosis: —Most similar to C. odorum Luu, H.Ð.Tr ần & G.Trần in having yellow flowers, trilobed labellum with reflexed margins and trilobed, yellow anther crest but differing by the presence of 20–50 cm tall stilt roots (vs. absent), elliptic to obovate-elliptic leaves (vs. narrowly elliptic), narrowly ovate bracts (vs. ovate), abaxially pubescent bracteoles (vs. ciliate at teeth), bilobed calyx with truncate tips (vs. tridentate with acute tips), broadly obovate to orbicular labellum (vs. obovate), filament 16–18 mm long (vs. ca. 13 mm long), and style glabrous (vs. sparsely hairy). Also similar to C. rubidum (Lamxay & N.S.Lý) Škorničk. & A.D.Poulsen, differing by its elliptic to obovate-elliptic leaves (vs. oblonglinear), narrowly ovate bracts (vs. obovate), abaxially pubescent bracteoles (vs. hairy at base), bilobed calyx with truncate tips (vs. tridentate with acute tips), broadly obovate to orbicular labellum (vs. reniform), filament 16–18 mm long (vs. 7–8 mm long), and style glabrous (vs. sparsely hairy). Type:— VIETNAM. Lam Dong Province: Bao Lam District, Loc Bac Commune, Loc Bac protection forests, 11°46’56.47”N, 107°36’23.75”E, 705 m elev., 12 March 2017, Lý Ngọc Sâm, Lý-879 (holotype: VNM!, isotypes: E!, P!). Description: —Laxly caespitose, clump-forming herb, 1.2–2 m tall. Rhizome horizontal, held ca. 20–50 cm above ground by numerous stilt roots (Fig. 1B), 10–42.5 cm long, 0.5–1 cm diam., slightly aromatic; stilt roots stout, dark brown to brown-greenish, 20–70 × 0.5–0.7 cm, glabrous; interval between pseudostems 2.8–5 cm, covered by ca. 8 distichous scales; scales hairy, broadly triangular, ca.1 × 1.5 cm, coriaceous, striate, outer surface tomentose, apex broadly acute to acuminate with a short mucronate tip. Leafy shoots 3–10 per each clump; pseudostem 1–1.5 m tall, with 9–16 leaves per pseudostem, swollen at base, 1.6–1.8 cm diameter, gradually becoming smaller towards apex, green, striate, glabrous, outer surface finely ...