Philodendron sousae Croat
  • Ann. Missouri Bot. Gard. 84: 528 (1997) 


Notes: Distribution: Mexico (Chiapas)

General Description

Hemiepiphytic; stem probably scandent; internodes to 3.5 cm long, 8-15 mm diam., yellow-brown to dark brown, epidermis drying smooth to wrinkled, sometimes fissured closely; roots drying reddish brown, thin, elongate, drying 3 - 4 mm diam., few per node; cataphylls 14 cm long, unribbed, deciduous. LEAVES: Petioles 29-54 cm long, 8-12 mm diam., ± terete, drying yellow-brown; sheathing 3-6.5 cm; blades ovate-cordate, subcoriaceous, gradually acuminate at apex, conspicuously cordate at base, 28-55 cm long, 12.5-28 cm wide (2.2 times longer than wide), (about as long as petiole), drying subcoriaceous, upper surface drying brown to olive-green, lower surface drying greenish to yellowish brown, smooth or minutely ridged; anterior lobe 23 - 36 cm long, 21 - 27 cm wide (2.8 - 3 times longer than posterior lobes); posterior lobes 8-12 cm long, 10 - 13 cm wide; sinus parabolic; midrib drying broadly convex and usually paler than surface above, drying narrowly convex and usually concolorous below; basal veins 3 - 5 per side, free to base, several coalesced to 1 - 2 cm, occasionally 2 fused to 3.5 cm; posterior rib usually not at all naked, sometimes obscurely so for about 1 cm; primary lateral veins 3-4 per side, departing midrib at a 60 - 70º angle, weakly arcuate to the margins, drying weakly raised and usually paler than surface above, drying raised below; minor veins arising from both the midrib and primary lateral veins. INFLORESCENCES to 4 per axil; peduncle 6.5-13 cm long, ca. 1 cm diam.; spathe 15 - 21 cm long (1.6 - 2.3 times longer than peduncle), with resin canals on inner surface, visibly constricted above the tube; spathe blade cream outside; spathe tube white, heavily tinged red or purple on both surfaces, spathe lube 5 - 11 cm long; spadix sessile; 6 - 14 cm long; pistillate portion cylindrical-tapered toward the apex, 2.4-4.1 cm long, 4-9 mm diam. at apex, 5 - 10 mm diam. at middle, 6-10 mm wide at base; staminate portion 3.6÷10 cm long; fertile staminate portion (4)9 mm diam. al base, 6 - 12 mm diam. at middle, 3 - 7 mm diam. ca. 1 cm from apex, broadest at or below middle, broader than the pistillate portion; sterile staminate portion not obvious; pistils 0.5-2.7 mm long, (0.7)1.8-2.7 mm diam.; ovary 6÷8-locular, 0.4 - 1.4 mm long, 0.7 - 2.7 mm diam., with basal (to sub-basal) placentation; locules 0.4 - 1.4 mm long, 0.9 mm diam.; ovule sac 0.3 mm long; ovules 2 per locule, contained within a translucent, gelatinous ovule sac, 0.1-0.2 mm long, much shorter than funicle; funicle 0.7 - 0.9 mm long, style 0.4 mm long, 0.4 - 1.5 mm diam., similar to style type D; stylar canals emerging at base of apical depressions and arranged separately in a ring on orifices around center; style apex flat; style boss moderately shallow to moderately prominent;stigma discoid, 0.4 mm diam., 0.1 mm high, covering entire style apex; thecae oblong to weakly ovate, 0.2 - 0.4 mm wide, divaricate.

Habitat

Atlantic slope in regions of "Selva Alta Perennifolia."

Distribution

Endemic to Mexico in Chiapas.

Distribution Map

 
  • Native distribution
Found in
  • Northern America Mexico Mexico Southeast

  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 Croat, T.Bernard A revision of Philodendron subgenus Philodendron (Araceae) for Mexico and Central America Ann. Missouri Bot. Gard. 84, (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.
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eMonocot
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eMonocot. (2010, 1st November). Retrieved Wednesday, 8th February, 2012, from http://e-monocot.org.
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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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