Rhaphidophora banosensis P.C.Boyce

Medium to large, moderately robust, semipachycaul homeophyllous liane to unknown ultimate height; seedling stage & pre-adult plants not observed; LEAVES: adult shoot architecture comprised of elongated, clinging, physiognomically monopodial, leafy, non-flowering stems and simple to slightly elaborated, free, sympodial, moderately leafy, flowering stems; stems smooth, climbing stems terete in cross-section, free stems more or less terete to very weakly four-angled in cross-section, without prophyll, cataphyll and petiolar sheath fibre, internodes to 2.5 x 0.75 cm free shoots, separated by prominent oblique leaf scars; flagellate foraging stems not observed; roots not observed; leaves scattered-distichous on flowering shoots; cataphylls and prophylls membranous, very quickly drying and falling; petiole very shallowly canaliculate adaxially, 9-10 x 0.3-0.4 cm, smooth, with a slight apical and prominent basal geniculum; petiolar sheath prominent, extending to and encircling the apical geniculum, very swiftly drying and falling to leave a thin continuous scar from the petiole base, around the top of the apical geniculum and back to the base; lamina entire, falcate-lanceolate to falcate-oblanceolate, 13.5-32.5 x 2.5-7 cm, thinly coriaceous, base to acute or slightly rounded, apex acuminate with a prominent apiculate tubule; midrib raised abaxially, almost flush adaxially; primary venation pinnate, raised abaxially and slightly less so adaxially; interprimaries parallel to primaries, less prominent, slightly raised abaxially and adaxially; secondary venation weakly reticulate, slightly raised abaxially and adaxially, but not at all prominent; INFLORESCENCE solitary, subtended by a fully developed foliage leaf and one or more soon-falling cataphyll; peduncle compressed-cylindric, swollen at insertion of spadix, 9 x 0.7 cm; spathe not observed; spadix cigar shaped, sessile, inserted obliquely on peduncle, c. 10 x 1 cm; stylar region well developed, rhombohexagonal, 1.5-2 x 1.5-2 mm, truncate; stigma slightly raised-punctiform, c. 0.3 mm diam.; anthers not exserted at anthesis; INFRUCTESCENCE stoutly cylindrical, c. 13 x 2 cm.