Pothoidium Schott
  • Oesterr. Bot. Wochenbl. 7: 70 (1857) 


Notes: Distribution: Taiwan to Malesia

General Description

HABIT : climbing herb, stems somewhat woody, flowering branches free and hanging. LEAVES : distichous, many. PETIOLE : oblong, entirely flattened, resembling blade, venation parallel, joined to blade by constricted articulation. BLADE : much shorter than petiole, triangular-lanceolate; midrib absent, no primary veins differentiated, veins parallel, running into apex. INFLORESCENCE : several to many, borne in a terminal branching system, lower inflorescences axillary to a foliage leaf, upper ones either subtended by cataphyll-like leaf or without subtending leaf. PEDUNCLE : peduncular axis slender, composed of one to several internodes, sometimes subtended by a prophyll, sometimes also bearing a cataphyll ± halfway up. SPATHE : occurrence irregular, often absent, linear-lanceolate, widely spreading, margins usually revolute. SPADIX : apparently often functionally unisexual, cylindric, sessile to long-stipitate when subtended by spathe. FLOWERS : apparently usually unisexual, sometimes bisexual, perigoniate, male flowers with well developed anthers and apparently sterile ovary, female flowers with large fertile ovary and lacking stamens; tepals 6, fornicate, membranaceous. STAMENS : 3-6, number often varying on single spadix, filaments elongated and overtopping perigone at anthesis, oblong-triangular, flattened, connective slender, thecae short, ellipsoid, dehiscing by broad slit. POLLEN : monosulcate, ellipsoid-oblong, medium-sized (mean 26 µm.), exine reticulate with psilate muri, apertural exine shallowly fossulate or verrucate. GYNOECIUM : broadly ovoid to subglobose or obovoid, ovary 1-locular, ovule 1, anatropous, funicle short, placenta subbasal, stylar region attenuate, stigma discoid-hemispheric. BERRY : ellipsoid to ovoid, apiculate (stigma remnant), prominently exserted when mature, red. SEED : ellipsoid, testa smooth, embryo large, endosperm absent.

Diagnostic Description

Evergreen, climbing hemiepiphytes; leaves distichous; petiole entirely flattened, resembling blade; leaf blade much shorter than petiole, midrib absent, fine venation parallel; inflorescences several, in terminal branching system, spathe often absent; flowers apparently usually unisexual, sometimes bisexual, perigoniate with 6 free tepals. Differs from Pothos in having 1-locular ovaries and flowering shoots terminating in a branching system of spadices and often functionally unisexual.

Habitat

Tropical humid forest; climbing hemiepiphyte.

Distribution

Taiwan, Malesia.

Distribution Map

 
  • Native distribution
Found in
  • Asia-Temperate Eastern Asia Taiwan
  • Asia-Tropical Malesia Maluku
  • Philippines
  • Sulawesi

Included Species

  Bibliography

  • 1 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.
  • 2 Gardens, K.""Royal Bot World Checklist of Selected Plant Families. (2008).
  • 3 Mayo, S.J., Bogner, J. & Boyce, P.C. The Genera of Araceae. (Royal Botanic Gardens Kew: 1997).

 Information From

CATE Araceae
http://araceae.e-monocot.org
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, 14 Dec 2011 . 17 Dec 2011.
  • A All Rights Reserved
eMonocot
http://e-monocot.org
eMonocot. (2010, 1st November). Retrieved Wednesday, 8th February, 2012, from http://e-monocot.org.
  • B Content licensed under Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License
World Checklist of Selected Plant Families
http://apps.kew.org/wcsp/
WCSP 2014. 'World Checklist of Selected Plant Families. Facilitated by the Royal Botanic Gardens, Kew. Published on the Internet; http://apps.kew.org/wcsp/ Retrieved 2011 onwards
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