Philodendron knappiae Croat
  • Ann. Missouri Bot. Gard. 84: 475 (1997) 

Notes: Distribution: Costa Rica to W. Panama

General Description

Terrestrial or hemiepiphytic; stems usually erect; internodes short, somewhat flattened on one side with marginal ribs, moderately glossy, 0.5--7 cm long, 1--1.7 cm diam., longer than broad below, short near apex, medium green, epidermis smooth, light brown; cataphylls 10--18 cm long, sharply 2-ribbed, green, sulcate adaxially, margins weakly raised abaxially, deciduous. LEAVES: Petioles 14--19 cm long, 2--7 mm diam., bluntly D-shaped, green, tinged reddish; blades ovate-triangular, subcoriaceous, bicolorous, long-apiculate at apex, cordate at base, 16--23.5 cm long, 7.5--11.5 cm wide (1.8--3 times longer than wide), (1.1--1.4 times longer than petiole), about equal in length to petiole, upper surface semiglossy, drying dark brown, lower surface slightly paler, drying dark yellow-brown or dark yellow-green; anterior lobe 12--18.5 cm long, 10.6--13 cm wide (2.2--3.3 times longer than posterior lobes); posterior lobes 5--8 cm long, 5--6.5 cm wide (1.4--1.8 times longer than wide), narrowly to obtusely rounded; sinus hippocrepiform, 3--5.5 cm deep; midrib broadly convex, paler than surface above, convex, reddish or paler than surface below; basal veins 3(5) per side, with 0--1 free to base, 2--3 coalesced 1--1.5 cm; posterior rib naked; primary lateral veins 5--7 per side, departing midrib at a (40)55--70 (lowermost to 80º) angle, arcuate-ascending to the margins, weakly visible above, weakly raised, often reddish below; minor veins distinct below, arising from the midrib only; secretory ducts present but inconspicuous. INFLORESCENCES 1 per axil; peduncle 2--3 cm long, 5--6 mm diam.; spathe 7-8 cm long, (2.3--3.6 times longer than peduncle), weakly constricted above the tube, 1.5 cm diam. at constriction, green throughout, pinkish within; spathe tube 3--4 cm long, 1.9 cm diam.; spadix 5.5--7 cm long, white throughout; pistillate portion 1.2 cm long, 1 cm diam.; staminate portion 4.3--5.8 cm long, 8--12 mm diam.; pistils 1--1.3 mm long, 0.7 mm diam.; ovary 4-locular; locules 0.8 mm long, 0.3-0.4 mm diam., with axile placentation; ovules 4 per locule, 2-seriate, 0.2 mm long, longer than funicle; funicle 0.1 mm long, adnate to lower part of partition, style similar to style type B; style apex flat to concave; stigma more or less hemispheroid, unlobed, 0.8 mm diam., 0.2 mm high, covering entire style apex; the androecium truncate, more or less prismatic, margins irregularly 4--6-sided, mostly 4--5-sided, 0.8--1.1 mm long; thecae oblong, 0.4 mm wide, more or less parallel to one another, not contiguous; sterile staminate flowers irregularly 4--6-sided, 0.9--1.1 mm long.


Tropical Lower Montane rain forest.


Endemic to western Panama, known only from the type locality in Chiriquí Province on Cerro Hornito.

Distribution Map

  • Native distribution
Found in
  • Southern America Central America Costa Rica
  • Panamá


  • 1 Hammel, B.E. & al. (2003). Manual de Plantas de Costa Rica 2: 1-694. Missouri Botanical Garden Press, St. Louis.
  • 2 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.
  • 3 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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