Homalomena vittifolia Kurniawan & P.C.Boyce

Small evergreen rheophytic herbs to ca. 15 cm tall. Stem pleionanthic, erect ca. 5 mm thick, medium green, internodes to ca. 1.5 mm long. Leaves many together; forming a subspreading rosette, petiole sharply channelled adaxially, rounded abaxially, spreading, 8-10 cm long, microscopically velutinous, matte medium green; petiolar sheath 3.5-4 cm long, ca. 1/3 length, sheath spreading, persistent, somewhat transparent, the margins somewhat stained pinkish red, lower clasping part in-curved, terminal part truncate, and margins somewhat erose; blade linear-elliptic, 12-18 cm long, 1.5-2.2 cm wide, thinly and rather softly leathery, matter mid-green adaxially, abaxially paler olive-green, margins weakly sinuous and conspicuously crispulate, base acute-cuneate, tip acute with margins minutely incurved-fornicate, apiculate for ca. 1 mm; midrib prominently rounded-raised abaxially, adaxially impressed, ca. 1.5 mm wide, with ca. 3 primary lateral veins on each side, these diverging at 15^o from the midrib, abaxially raised and somewhat darker than the blade, adaxially slightly impressed; interprimary veins ca. 1/2 width of the primary lateral veins; secondary venation conspicuous, darker than the blade (abaxially), somewhat reticulate; tertiary venation very irregularly forming weakly reticulate veinlets, all veins running into a slightly thickened intermarginal vein. Inflorescences up to 4 together, together, erect at anthesis, later declinate; peduncle to ca. 3.5-4 cm long, ca. 1 mm diam., pale green. Spathe ca. 2 cm long, not constricted, matte pale green externally, somewhat shiny pale green internally, with a terminal short mucro to ca. 1.5 mm long, spathe opening at anthesis by inflation and thence by a broad slit, later closing by which time spadix has extended to project beyond the tip of the closed spathe. Spadix ca. 1.5 cm long, 2.5 mm diam., sterile at the tip by the non-development of the staminate flowers, sessile; pistillate flower zone ca. 2.5 mm long; pistils few, usually only 3 spirals, obliquely globose, ca. 1 mm tall, 0.8-0.9 mm diam. greenish white, stigma on a thick, obliquely-extended stipe, minutely disk-like, 0.2-0.3 mm diam.; each pistil with a single staminode situated on ventral side of the flower relative to the base of the spadix; interpistillar staminodes globose, almost sessile, ca. 0.2 mm long, yellow; suprapistillar interstice zone absent or very short, less than 0.1 mm, naked, pale green; staminate flower zone 1 cm long, apex acute, obliquely inserted relative to pistillate flower zone; staminate flowers broadly globose-dumbbell shaped, almost all consisting of two stamens, stamens rounded, ca. 0.5 mm tall, 0.5 mm long, ca. 1 mm wide, yellowish green, anther thecae opening by a broad terminal slit. Infructescence declinate, pale green. Fruits and seeds not observed.