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This species is accepted, and its native range is Nansei-shoto (Okinawa, Iriomote), Philippines (N. Luzon).
A specimen from Kew's Herbarium

[CATE]

CATE Araceae, 17 Dec 2011. araceae.e-monocot.org

Distribution
Endemic to northern Luzon, known only from Mt Polis, and an unspecified locality in Bontoc Subprovince.
General Description
Moderately robust herb; petiole to ca. 50 cm long, sheathing in the lover third; blade membranous, ovato-sagittate, ca. 40 cm long , very shallowly peltate; anterior lobe ca. 30 cm long x 30 cm wide at base, with about 4 primary lateral veins on each side of the anterior costa diverging at ca. 45-70°, secondary veins flush on both sides of the blade, arising from the primary veins at ca. 70° and then deflected to the amrgin, not or hardly forming interprimary collective veins; posterior costae diverging at an obtuse angle; posterior lobes ca. Half the length of the anterior, rounded, with little laminar tissue on the posterior side of the posterior costae, but this confluentacross the sinus; glands in the axils of the primary veins inconspicuous or absent; inflorescence arrangement (not known); spathe to ca. 14 cm long; lower spathe ca. 4 cm long, ovoid, asymmetric (due to partial connation with spadix); limb broadly oblong-lanceolate, cucullate, the basal ca. 1 cm deflected and somewhat inflated, then the rest erect, dark purple brown; spadix somewhat shorter than the spathe; female zone ca. 3 cm long, partly connate with spathe in lower third, tapering distally; ovaries globuse, rather large, ca. 2.5-3 mm diam. (dry); stigma strongly 3-4-lobed on a very short style; sterlie interstice slender, ca. 1 cm long, corresponding with spathe constriction male zone ca. 3 cm long x 1.3 cm thick (dry); synandria rhombo-hexagonal, ca. 2 mm diam., more or less capped by expanding synconnectivel appendix slightly longer than to about twice the length of the male zone, slightly constricted at junction with male zone, thence cylindric and distally abruptly tapering; infructescence unknown.
Diagnostic
The female zone partly adnate to the spathe, the large ovaries and purple, rather inflated spathe limb appear diagnostic.

Native to:

Nansei-shoto, Philippines

Alocasia atropurpurea Engl. appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Nov 14, 1996 McGregor, R.C. [Bureau of Science no 19663], Philippines K000291390 isotype

First published in Pflanzenr., IV, 23E: 132 (1920)

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.
  • Govaerts, R. (1995). World Checklist of Seed Plants 1(1, 2): 1-483, 1-529. MIM, Deurne.

Literature

CATE Araceae

  • Hay, A. 1999. The genus Alocasia (Araceae-Colocasieae) in the Philippines. Gardens Bull. Singapore. 51: 1 - 41.

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.
http://creativecommons.org/licenses/by-nc-sa/3.0

Herbarium Catalogue Specimens
Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/

Kew Backbone Distributions
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0