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Araceae
Rhaphidophora cylindrosperma Engl. & K.Krause
SUMMARY
Moderate leptocaul homeophyllous liane to unknown ultimate height; seedling stage and pre-adult plants not observed; LEAVES: adult shoot architecture not fully observed, flowering stems, moderately branched and leafy, apparently pendent; stems smooth, terete, with cataphylls and prophylls soon falling, internodes 2-3.5 x 0.8-1.2 cm, separated by prominent straight to slightly oblique leaf scars; flagellate foraging stem not observed; roots not observed; leaves spiro-distichous; cataphylls and prophylls membranous, soon falling; petiole canaliculate, 5-14 x 0.2-0.4 cm, basal geniculum very large and prominent, apical geniculum less so; petiolar sheath narrow and not prominent, extending to apical geniculum, ± short-persistent; lamina entire, subfalcate-lanceolate or oblong-elliptic, oblique, 10-19.5 x 2.5-6.5 cm, membranous, base acute, apex acuminate; midrib prominently raised abaxially, slightly impressed adaxially; primary venation pinnate, prominently raised abaxially, impressed adaxially; interprimaries subparallel to primaries, slightly less prominent; secondary venation reticulate, slightly raised abaxially; INFLORESCENCE solitary, subtended by a ± fully developed foliage leaf and one or more cataphylls; peduncle terete, 2-4 x 0.3-0.4 cm; spathe slender, 9-11 x 0.5 cm, apically tapering and ultimately stout beaked; spadix cylindrical-obtuse, sessile, inserted ± on peduncle, 3-10 x 1 cm (fruiting specimen only); stylar region moderately developed, slightly rhombohexagonal, c. 1.8 mm diam., ± truncate; stigma punctiform, raised, c. 0.3 mm diam.; anthers not observed; INFRUCTESCENCE 3-10 x 1-1.5 cm.