Philodendron antonioanum Croat
  • Ann. Missouri Bot. Gard. 84: 402 (1997) 

Notes: Distribution: C. Panama

General Description

Hemiepiphytic; larger stems drying reddish brown, smooth, and coarsely striate at nodes, smaller stems drying light yellow-brown, glossy, and finely longitudinally ribbed, finally dark brown and transversely finely cracked; internodes short, 4--7 cm diam., broader than long; roots to 30 cm long, numerous per node, drying reddish brown, weakly glossy, and somewhat ridged; cataphylls 35--39 cm long, sharply 2-ribbed, red, broadly sulcate abaxially, persisting as pale brown fibers densely clothing the entire apex of the stem with tiny fragments of reddish brown epidermis persisting among the fibers; LEAVES: petioles 28--91 cm long, 1.5--2 cm diam., subteret, obtusely flattened adaxially, weakly 1-ribbed near apex, broadly and obtusely sulcate, to 3.5 cm diam. near base, dark green (reddish brown when young), drying reddish brown and matte, surface moderately glossy, prominently striate-lineate throughout; blades broadly ovate, moderately coriaceous, bicolorous, semiglossy, 26--86 cm long, 18--57 cm wide (1.2--1.5 times longer than wide), margins broadly and sparsely undulate, upper surface drying dark brown to gray-brown, lower surface drying reddish brown; sinus hippocrepiform to obovate, 4--18 cm deep; midrib flat and slightly paler than surface, drying convexand darker than surface above, convex, sometimes tinged reddish, drying obtusely angular, grayish brown, and sparsely short pale-lineate below; basal veins 7 per side, with the first and second free to base, the third through sixth veins coalesced to 7 cm, posterior rib barely naked near the base, weakly curved; primary lateral veins 5--6 per side, departing midrib at a 40--50º angle, drying reddish brown below, obtusely and deeply sunken, concolorous, drying raised and somewhat darker above, convex, more or less concolorous, drying concolorous, matte below; minor veins moderately distinct, drying prominulous above and below, arising from both the midrib and primary lateral veins, secretory canals appearing but not obvious below; "cross-veins" numerous, more or less transverse. INFLORESCENCES 2 per axil; peduncle 6--7 cm long, 1.5 cm diam., magenta, conspicuously white-striate toward the apex; spathe 15--16 cm long, weakly constricted midway, weakly glossy, moderately coriaceous, drying reddish brown both surfaces, acuminate at apex; spathe blade greenish white outside, white, tinged reddish in lower half inside; spathe tube inflated, dark maroon outside, to 7 cm long, 5.8 cm diam., dark maroon inside; spadix 15 cm long; pistillate portion 3.5--5 cm long in front, 3.3--3.7 cm long in back, 2--2.5 cm diam. at apex, 2.3--3 cm wide at base; staminate portion 9--11.7 cm long; fertile staminate portion gradually tapered toward apex; sterile staminate portion 2.5--2.6 cm diam.; pistils 3.2--3.5 mm long, creamy brown, ovary 5-locular, ca. 0.4 mm long, with parietal placentation; ovules 25--30 per locule, 2--3-seriate; funicle ca. 0.2 mm long, style 1 mm diam., similar to style type B; style apex flat, with small depressions; stigma 1.3--1.5 mm diam., 0.4 mm high, covering entire style apex; the androecium margins sharply 4--6-sided, 0.6--1.2 mm diam. at apex; sterile staminate flowers rounded to bluntly 4--6-sided, larger toward the base, 0.6--2.8 mm wide.


Tropical Lower Montane rain forest.


Endemic to central Panama and known only from the type locality at Cerro Tute and at El Copé.

Distribution Map

  • Native distribution
Found in
  • Southern America Central America Panamá


  • 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
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. (2010, 1st November). Retrieved Wednesday, 8th February, 2012, from
  • B Content licensed under Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License
World Checklist of Selected Plant Families
WCSP 2014. 'World Checklist of Selected Plant Families. Facilitated by the Royal Botanic Gardens, Kew. Published on the Internet; Retrieved 2011 onwards
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