Araceae Juss.

Rhaphidophora monticola K.Krause

This species is accepted, and its native range is Philippines.


CATE Araceae, 17 Dec 2011.

Philippines (Leyte, Luzon, Mindanao, Negros). Endemic.
A species of extraordinary appearance immediately recognizable by the texture and dense venation of the leaf laminas and by the remarkably elongated and robust peduncle, the latter being unique in the genus. It is not at all clear to what R. monticola is related.
General Description
Very robust, pachycaul, homeophyllous liane to 15 m; seedling stage and pre-adult plants not observed; LEAVES: adult shoot architecture comprised of elongated, clinging, physiognomically monopodial, densely leafy, non-flowering (always?) stems and clinging, sympodial, densely leafy, flowering stems; stems smooth, with cataphylls and prophylls degrading into robust simple fibres and then falling quickly, internodes to 15 x 5 cm, separated by large straight to slightly oblique leaf scars; flagellate foraging stem not observed; roots not observed; leaves spiro-distichous; cataphylls and prophylls subcoriaceous, degrading into robust simple fibres and then falling; petiole deeply canaliculate, 30-108 x 1.4-4.5 cm, smooth for the most part apical and basal geniculi very large but not especially prominent; petiolar sheath very prominent, extending to between c. 6 cm from or reaching the apical geniculum in largest leaves, long-persistent, eventually falling to leave a large, corky scar; lamina entire, ovate to oblong-ovate, 24-80 x 14-41 cm, stiffly coriaceous to subsucculent, semi-glossy above, matte beneath, drying pale yellow-brown like all other vegetative parts, base broadly rounded to shallowly cordate, apex acute to acuminate with a stout apical tubule; midrib very prominently raised and abaxially, ± impressed adaxially; primary venation densely pinnate, raised abaxially and adaxially; interprimaries parallel to primaries, more identically prominent; secondary venation reticulate, barely visible; INFLORESCENCE subtended by a partially developed foliage leaf large cataphylls; peduncle terete, exceptionally long, 30-117 x 1.5-2 cm; spathe slender canoe-shaped, very stoutly beaked, 21-32.5 x 3.5-5 cm, stiffly thin-fleshy, dull greenish white to yellowish green, slightly tinged purple on the inside surface, persistent though maturation of fruit; spadix slender tapering-cylindrical, stipitate but stipe long decurrent (to 6 cm) on peduncle/spathe insertion, 17-22 x 1.3-1.5 cm, greenish, later pale yellow; stylar region moderately developed, rhombohexagonal, 1-2 x 1-1.5 mm, truncate; stigma vertically elongated to (lowermost pistils) punctiform, slightly raised at anthesis, c. 0.25 mm diam.; anthers not exserted at anthesis; INFRUCTESCENCE up to 28 x 3 cm.
Primary dipterocarp forest, mossy forest.

Native to:


Rhaphidophora monticola K.Krause appears in other Kew resources:

Date Reference Identified As Barcode Type Status Has image?
Elmer, A.D.E. [10098], Philippines K000291776 Unknown type material Yes
Elmer, A.D.E. [16790], Philippines K000291775 Unknown type material Yes

First published in Beibl. Bot. Jahrb. Syst. 101: 12 (1910)

Accepted by

  • Govaerts, R. & Frodin, D.G. (2002). World Checklist and Bibliography of Araceae (and Acoraceae): 1-560. The Board of Trustees of the Royal Botanic Gardens, Kew.


CATE Araceae

  • P.C. Boyce 2000. The Genus Rhaphidophora Hassk. (Araceae-Monsteroideae-Monstereae) in the Philippines Gardens Bulletin Singapore. 52: 213-256

  • CATE Araceae

    Haigh, A., Clark, B., Reynolds, L., Mayo, S.J., Croat, T.B., Lay, L., Boyce, P.C., Mora, M., Bogner, J., Sellaro, M., Wong, S.Y., Kostelac, C., Grayum, M.H., Keating, R.C., Ruckert, G., Naylor, M.F. and Hay, A., CATE Araceae, 17 Dec 2011.

  • Herbarium Catalogue Specimens

    Digital Image © Board of Trustees, RBG Kew

  • Kew Backbone Distributions

    The International Plant Names Index and World Checklist of Selected Plant Families 2022. Published on the Internet at and
    © Copyright 2017 World Checklist of Selected Plant Families.

  • Kew Names and Taxonomic Backbone

    The International Plant Names Index and World Checklist of Selected Plant Families 2022. Published on the Internet at and
    © Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families.