Philodendron pirrense Croat
  • Ann. Missouri Bot. Gard. 84: 495 (1997) 


Notes: Distribution: Panama (Darién)

General Description

Hemiepiphytic or sometimes terrestrial; stem to 5 cm long; internodes short, semiglossy, closely ribbed, completely enclosed in cataphyll fibers, 1--2 cm long, 4--5 cm diam.; roots to ca. 30 cm long, drying reddish brown, smooth, semiglossy, ca. 2 mm diam., closely ridged; cataphylls 25--30 cm long, sharply 2-ribbed (ribs prominently raised), reddish, drying reddish brown, persisting semi-intact, ultimately as coarse pale fibers with fragments of reddish brown epidermis. LEAVES: Petioles 56.5--100 cm long, 5--8 mm diam., subterete, somewhat flattened near base, weakly flattened toward apex, with faint medial rib adaxially, surface densely short-lineate; blades broadly ovate-cordate, acuminate to narrowly acuminate at apex, cordate at base, 35--58 cm long, 27--46 cm wide (1.2--1.5 times longer than wide), (0.6--0.9 times longer than petiole), upper surface drying reddish brown, semiglossy, lower surface much paler; anterior lobe 24.5--48.5 cm long, 27--50 cm wide (1.7--2.3 times longer than posterior lobes); posterior lobes more or less rounded, 12.5--19 cm long, 12.5--23.5 cm wide, broadly obtuse; sinus hippocrepiform, 14 cm deep; midrib flat, paler than surface above, drying reddish brown below; basal veins 7--11 per side, with 0--1 free to base, 1--2 coalesced (4)6--8(10) cm, posterior rib well developed, naked for 1--5 cm; primary lateral veins 6--10 per side, departing midrib at a 55--65º angle, more or less straight to the margins, prominently sunken above, prominently raised below; interprimary veins distinct, fine, mostly continous, drying darker than surface below; minor veins arising from both the midrib and primary lateral veins. INFLORESCENCES 4 per axil; peduncle 8.5--12 cm long, 6--8 mm diam., prominently white striate, clearly demarcated from spathe; spathe 12--16.7 cm long (1.3--1.5 times longer than peduncle), moderately constricted above the tube; spathe blade green, tinged maroon, conspicuously and densely pale lineate-striate outside, white, tinged maroon inside; spathe tube red-maroon, inconspicuously short-lineate outside, 4--6 cm long, dark maroon inside; spadix sessile; more or less ovate, 11--13.4 cm long, broadest below the middle; pistillate portion greenish white, 2.7 cm long, 1.4 cm diam. at apex, 1.3 cm wide at base; staminate portion 10.8 cm long; staminate portion 5.7--8.3 cm long; fertile staminate portion white, tapered toward apex, 1.4 cm diam. at base, 1.3 cm diam. at middle, 8 mm diam. ca. 1 cm from apex, broadest at base, about as broad as pistillate portion; sterile staminate portion broader than the pistillate portion 1.4--1.5 cm diam. pistils 2.5 mm long, 1.2--1.4 mm diam.; ovary 5--6-locular, 1.7 mm long, 1.3 mm diam., with axile placentation, walls embedded with granular, crystal-like particles; locules 1.7 mm long, 0.4 mm diam.; ovules 20 per locule, 2-seriate, contained within gelatinous matrix (no true envelope), 0.2--0.3 mm long, longer than funicle; funicle 0.1--0.2 mm long, style 0.3 mm long, 1.3 mm diam., similar to style type B; style apex flat; stigma subdiscoid to slightly hemispheroid, weakly lobed, 1.2 mm diam., 0.1--0.3 mm high, covering entire style apex; the androecium truncate, prismatic, oblong, margins irregularly 4--6-sided; thecae oblong, 0.5 mm wide, more or less parallel to one another; sterile staminate flowers blunt, irregular, 4--6-sided, 2.1--3 mm long, 1.7 mm wide. INFRUCTESCENCE: Berries white.

Habitat

Premontane rain forest.

Distribution

Endemic to Panama, where it is known for certain only from the Serranía de Pirre.

Distribution Map

 
  • Native distribution
Found in
  • Southern America Central America Panamá

  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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