Asterostigma Fisch. & C.A.Mey.
  • Bull. Cl. Phys.-Math. Acad. Imp. Sci. Saint-Pétersbourg 3: 148 (1845) 


Notes: Distribution: Brazil to NE. Argentina

General Description

HABIT : seasonally dormant herbs. Stem tuberous, depressed-globose. LEAF : solitary, erect; PETIOLE : smooth, usually maculated in a marbled pattern, resembling snake skin, leaf sheath short and usually inconspicuous; LEAF BLADE : subcordate to cordate in outline, pinnatipartite, higher order venation reticulate. INFLORESCENCE : 1-4, rarely one of them aborted in a leafy structure, appearing before or with leaves, erect at anthesis, erect or pendant in fruit. PEDUNCLE : usually longer than half of petiole length, sometimes longer than the entire petiole. SPATHE : erect, convolute at base, not constricted to slightly constricted at middle. SPADIX : completely free or adnate to half of the female spadix, flowers congested to laxly flowered, male portion without a conspicuous sterile zone. FLOWERS : diclinous, perigone absent; male flowers in sessile to shortly pedicelled synandria 3-5-andric, thecae subglobose to globose, dehiscing by a transversal slit, connective flattened to convex; pollen grain inapertured, ellipsoid, psilate; female flowers surrounded by a row of 4-8 staminodes, usually flattened, free to connate; ovary ovoid to depressed-globose, 3-5 locular, locules uniovulated, ovules anatropous, funicles short, placentation axile to sub-basal, style often distinct, stigma conspicuously 2-5 lobed, usually star-shaped or cross-shaped, lobes entire to bifid at apex. INFRUCTESCENCE : with persistent spathe; berry moderately fleshy to spongy, 3-5 lobed, white to yellowish, usually with purple-speckled. SEED : ellipsoid to oblong, testasmooth, endosperm copious.

Diagnostic Description

Medium-sized, seasonally dormant, tuberous geophytes; leaf blade with reticulate fine venation and no submarginal collective veins; flowers unisexual, perigone absent; spadix fertile to apex; stigmas star-shaped. Differs from Croatiella and Incarum in its anatropous ovules and pinnatisect leaf blades which are essentially tripartite with the three divisions each once-pinnate. Differs from Incarum in flat or convex central surface of the synandrium.

Habitat

Tropical and subtropical humid forests; geophytes, forest floor.

Distribution

Brazil to NE. Argentina.

Distribution Map

 
  • Native distribution
Specimens
Found in
  • Southern America Brazil Brazil Northeast
  • Brazil South
  • Brazil Southeast
  • Brazil West-Central
  • Southern South America Argentina Northeast

  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 Govaerts, R. (1995). World Checklist of Seed Plants 1(1, 2): 1-483, 1-529. MIM, Deurne.
  • 3 Gardens, K.""Royal Bot World Checklist of Selected Plant Families. (2008).
  • 4 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.
  • C 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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