Gorgonidium Schott
  • Ann. Mus. Bot. Lugduno-Batavi 1: 283 (1864) 


Notes: Distribution: Peru to N. Argentina

General Description

HABIT : seasonally dormant herbs, tuber depressed globose. LEAF : solitary. PETIOLE : terete, sheath short. BLADE : pinnatifid, pinnatisect or bipinnatifid, pinnae (9-)11-14, elliptic, entire or pinnatifid (with all intermediates), acute, upper lobes decurrent, lower ones sessile to shortly stalked; primary lateral veins of ultimate lobes pinnate, running into margin, higher order venation reticulate. INFLORESCENCE : 1(-2) per floral sympodium, appearing before leaf. PEDUNCLE : much shorter than petiole. SPATHE : erect or slightly fornicate, boat-shaped, very shortly convolute at base, not constricted, purple, persistent at least in lower part. SPADIX : fertile to apex, female zone contiguous with and much shorter than male zone. FLOWERS : unisexual, perigone absent. MALE FLOWER : 3-7-androus, stamens free or connate to different degrees into a synandrium, connective slender, sometimes stipe-like between thecae (G. mirabile), otherwise inconspicuous, thecae globular, sometimes remote from one another, dehiscing by apical pore or slit, pistillode present or absent, if present composed of 3-4 stylodia with slightly lobed or discoid-capitate apices (stigmatoids). POLLEN : inaperturate, ellipsoid, medium-sized (mean 34 µm, range 27-42 µm.), exine verrucose (G. mirabile) to retiverruculate, sometimes verrucae irregularly formed and flattened (G. vargasii). FEMALE FLOWERS : gynoecium surrouonded by whorl of 6-8 filiform or subclavate staminodes, ovary subglobular to broadly ovoid, (2-)4-5(-7)-locular, ovules 1 per locule, orthotropous, ovoid, funicle half as long as ovule, placenta axile at base of septum, style short to long, stigma 4-5-lobed or subcapitate. BERRY : globular to depressed-globular, blackish-purple to purple, sometimes upper surface somewhat warty (G. vargasii), stigma and style remnants persistent. SEED : ovoid, globular to ellipsoid, testa brownish, smooth to rough, embryo elongate, endosperm copious.

Diagnostic Description

Seasonally dormant tuberous geophytes; leaf blade with reticulate fine venation; flowers unisexual, perigone absent; female flowers surrounded by a whorl of free staminodes; ovules orthotropous. Differs from Synandrospadix in staminodes in female flowers filiform to subclavate, male flowers with stamens free or connate to different degrees into a synandrium (always entirely connate in Synandrospadix) and leaf blades pinnatifid, pinnatisect or bipinnatifid.

Habitat

Tropical and subtropical forest or open places, between 900-3000m; geophytes, stony ground.

Distribution

Peru to N. Argentina.

Distribution Map

 
  • Native distribution
Specimens
Found in
  • Southern America Southern South America Argentina Northeast
  • Argentina Northwest
  • Western South America Bolivia
  • Peru

  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
Global Biodiversity Information Facility
http://data.gbif.org
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eMonocot
http://e-monocot.org
eMonocot. (2010, 1st November). Retrieved Wednesday, 8th February, 2012, from http://e-monocot.org.
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TreeBASE
http://treebase.org/treebase-web/home.html
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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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