In Greek mythology, Hebe, the daughter of Zeus and Hera, was the goddess of youth and also the cup bearer for the gods and goddesses of Mount Olympus, serving their nectar and ambrosia. The epithet is chosen to highlight sticky amber-yellow liquid that is secreted into the excavated interstice staminodes during staminate anthesis.
Indonesian Borneo, Kalimantan Utara, Malinau, Sembakung 70 km S.W. of Malinau, 80 km S.W. of Long Loreh Coalmine Village, Riam Marthin Billa, 2°47'N 115°50'E, 4 May 2012, K.Nakamoto AR-3922 (holo BO – alcohol!; iso SAR – alcohol!)
Medium-sized clumping obligate rheophytes to 35 cm tall. Stem initially erect and somewhat condensed, later decumbent and rhizome-like, ca. 20 cm long 3 ca. 2.5 cm in diam., active portions obscured by the dense leaf bases, older parts naked with conspicuous scars and often producing reiterative shoots, stem copious strong roots. Leaves several together, petioles erect with blades very slightly arching; individual modules with 3–5 leaves, modules subtended by a linear-triangular 2-keeled prophyll to 5 cm long and ca. 5 mm wide, initially prophyll green, but soon decaying; petiole 11–17 cm long, very weakly D-shaped in cross section, ca. 3 mm wide x ca. 2.5 mm high, sheathing at the extreme base, dorsal edges slightly raised, semi glossy medium green; petiolar sheath with wings extended into a narrowly triangular ligular portion 5–9 cm long, ligule soon marcescent and shedding to leave a short collar of brown papery tissue; blade softly coriaceous, elliptic, 17–22 cm long x 4–5 cm wide, base cuneate, apex acute, apiculate for ca. 6 mm, adaxially semi glossy very dark green, glossy pale green abaxially; midrib abaxially prominent, somewhat paler than the rest of the blade, adaxially bluntly raised, with ca. 4 adaxially very weakly defined primary lateral veins on each side, these diverging at ca. 30° , adaxially primary lateral veins merging into the slightly raised marginal vein running ca. 2 mm in from the leaf margin; interprimary veins invisible adaxially, abaxially slightly darker than the primaries; secondary venation adaxially invisible. Inflorescence solitary, subtended by a ca. 5 cm long, very narrowly triangular somewhat leathery cataphyll; peduncle slender, spreading to slightly pendent, shorter than the petioles, up to 10 cm long, ca. 3 mm diam., terete, medium green, inserted slightly obliquely on the spathe; spathe narrowly ovate with a very long acuminate tip, not constricted, ca. 9.5 cm long, lower part campanuliform at anthesis, medium green, ultimately persistent through fruiting, long-apiculate for up to 1.5 cm, limb exterior glistening white, interior greenish in the lower 1/3, the remainder white, apicule distally green; limb inflating and then gaping at pistillate anthesis, prior to staminate anthesis limb caducous from the junction with the persistent lower part, limb falling more-or-less intact to leave the narrowly campanuliform persistent lower spathe, with a scarred regular rim. Spadix cylindric, ca. 4.5 cm long x ca. 6 mm in diam., less than half the length of the spathe, fertile almost to the tip, basally very shortly stipitate; stipe oblique, ca. 5 mm wide x ca. 2 mm long on longest side, white; pistillate flower zone weakly fusiform-cylindric, about the same width as the other fertile parts of the spadix, comprising about 1/5 of the spadix, ca. 7 mm long; pistils subglobose, truncate, c. 1.1 mm in diam., pale green; stigma sessile, capitate, papillose, almost as wide as the ovary medium green, producing a very conspicuous stigmatic droplet at anthesis, turning brownish as post anthesis; sterile interstice cylindric, equalling the pistillate zone in width, occasionally with the lowermost part irregularly naked, ca. 7 mm long, with 3–6 dense whorls of mainly oblong, excavated staminodes, these ca. 1.5 mm long x .75 mm wide, medium yellow, the cavity filling with an amber-yellow sticky fluid during staminate anthesis; staminate flower zone ca. 2/3 of total spadix length, ca. 2 cm long, lower part equalling the width of the sterile interstice, fertile to the tip, or the tip furnished with a few staminodes, glossy white; staminate flowers densely packed, each comprised of two stamens, ivory, 6 oblong, with the long sides parallel to the spadix axis, ca. 2 x 1 mm, connective excavated; thecae ellipsoid, embedded in the ends connective, each ca. 0.5 mm long; thecae horns two per stamen, ca. 0.5 mm long, peg-like, erect. Infructescence not observed.