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This species is accepted, and its native range is Marianas (Guam).


CATE Araceae, 17 Dec 2011.

While resembling Rhaphidophora spathacea, R. guamensis is immediately distinguishable by the solitary inflorescence carried on the tip of a free lateral shoot, and which does not emerge from a mass of chartaceous prophyll and cataphylls, and also by the robustly stipitate spadix. In addition, the remarkably long stigmatic stipe is notable.
General Description
Moderately robust, medium-sized semi-leptocaul, heterophyllous(?) liane to unknown ultimate height; seedling stage not observed; pre-adult plants forming scattered terrestrial colonies; LEAVES: adult shoot architecture comprised of elongated, clinging, physiognomically unbranched, scattered-leafy, non-flowering stems and free, sympodial, leafy flowering stems; stems smooth, mid-green, cataphylls and prophylls briefly persistent then falling leaving bare stems, internodes 0.5-3 x 0.3-1 cm, separated by prominent straight leaf scars; flagellate foraging stem not observed; clasping roots solitary to somewhat densely produced arising from the nodes and internodes adjacent to nodes; feeding roots not observed; leaves more-or-less distichous; cataphylls and prophylls drying chartaceous, briefly persistent; petiole deeply canaliculate, 9-15 x 0.2-0.4 cm, smooth, apical geniculum large but not especially prominent, basal geniculum almost invisible; petiolar sheath extending to base of apical geniculum, broad, chartaceous, short-persistent, degrading to very sparse papery strips, then falling; lamina entire, oblong-elliptic to oblong-lanceolate or oblanceolate, slightly oblique to markedly oblique, 15-32 x 4-8.5 cm, submembranous to coriaceous, base rounded to acute, apex acute to weakly acuminate; midrib raised abaxially, ± flush adaxially to weakly raised abaxially; primary venation pinnate, slightly raised abaxially, flush adaxially, drying darker than lamina; interprimaries sub-parallel to primaries, much less prominent, slightly raised abaxially, barely visible adaxially; secondary venation reticulate, raised, especially notable in dry material; INFLORESCENCE solitary, subtended by a fully to partially developed foliage leaf and one to several degraded and soon-falling chartaceous cataphylls; peduncle rather stout, terete, 6-8 x 0.3-0.5 cm; spathe broadly canoe-shaped, briefly stout-beaked, 10-12 x 2-7 cm, spongy-fleshy, very thick-walled, pale yellow, caducous, falling leaving a very prominent oblique scar; stipe stoutly terete, 1-1.5 x 0.4-0.5 cm; spadix slender to somewhat stout-cylindrical, stipitate, cochleate at insertion on stipe, 7-9 x 1-1.5 cm, white at male anthesis; stylar region strongly conical, mostly hexagonal in top view, 0.9-1.2 x 1-1.1 mm; stigma punctiform on the tip of a long (c. 2 mm) stipe, 0.5-0.2 x c. 0.3 mm, glossy and black in dried material; anthers not exserted at male anthesis; INFRUCTESCENCE not observed.
Mixed forest, coconut plantation, on limestone

Native to:


Rhaphidophora guamensis P.C.Boyce appears in other Kew resources:

First published in Gard. Bull. Singapore 53: 112 (2001)

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 2001. The Genus Rhaphidophora Hassk. (Araceae-Monsteroideae-Monstereae) in New Guinea, Australia and the Tropical Western Pacific Gardens Bulletin Singapore. 53: 75-183

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.

Kew Backbone Distributions
The International Plant Names Index and World Checklist of Selected Plant Families 2021. 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 2021. Published on the Internet at and
© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families.