Philodendron longirrhizum M.M.Mora & Croat
  • Willdenowia 37: 541 (2007) 


Notes: Distribution: Colombia to Venezuela

General Description

Hemiepiphytic scandent creeper up to 15 m high, rarely terrestrial; internodes (2-)7-20 cm long, 1-3 cm in diam., greyish green and semiglossy, turning light brown to light yellowish with brown transverse fissures, epidermis commonly flaking when dry; aerial roots with epidermis tan to reddish brown, arising just below the nodes, 1-4 at the apical nodes, up to 8 at lower nodes, up to 3 mm in diam. and up to 8 m long. Cataphylls sharply 2-ribbed (the ribs slender, 3-5 mm high), 11-13(-15) cm long, succulent, whitish to greenish, sometimes tinged red-purple with scattered purple spots, most of them at the middle, deciduous intact. Leaves erect-spreading, distributed along the stem; petioles (20-)25-35(-51) cm long, 0.5-0.8 cm in diam., terete to U-shaped (thicker than broad) in cross section, obtusely and weakly flattened adaxially, light green, faintly streaked with darker lines, sometimes with a purplish apical ring at apex; blades ovate-cordate to narrowly sagittate to oblong-cordate; gradually long-acuminate at apex, cordate at base, 20-47 × 11-26 cm, 1.7-3.7 times longer than broad, semiglossy, dark green above, moderately paler below, drying dark brown to reddish brown above, paler and sometimes greenish brown below; posterior lobes 4.5-12.5 cm long, 4-9 cm wide; sinus 4-8 cm deep, subhippocrepiform to parabolic, sometimes triangular; midrib flat and moderately paler, with short intermittent lines; basal veins (3-)4-5, 3-5 close together at base but never forming a posterior rib; the 1st pair free to the base; primary lateral veins 7-10 per side arising at 65-75° angle, sunken above; interprimary veins usually present; minor veins moderately obscure. Inflorescences 1-2 per axil; peduncle 2.5-5(-6.5) cm long, 0.5-1.2 cm in diam., pale green; spathe 8-16 cm long; green to yellowish green at the blade, reddish at the tube outside, greenish at the apex and bright reddish purple at the tube inside, weakly constricted at the middle; spadix slightly protruding at anthesis 7.9-12.8 cm long, pistillate portion 4.5-5.8 cm long, 0.5-0.7 cm in diam. at base, 0.8-1 cm in diam. midway and at apex; staminate portion 3.4-7.3 cm long, 1-1.2 cm in diam. on sterile portion at base, 0.8-1 cm in diam. at constricted portion, 1.2-1.4 cm in diam. in upper 2/3, narrowly rounded at apex; the staminate and pistillate portions often of the same length; sterile staminate portion 0.6-0.8 mm long; pistils 1.7-1.8 mm long; ovary broadly elliptic; stigma 1-1.2 mm in diam. at apex, weakly concave with the margins somewhat raised and with a weak central dome; ovary 6-8-locular, c. 1 mm long; ovules 1-2 per locule, 0.2 mm long, funicle 0.1 mm long; berries not seen.

Diagnostic Description

Planta hemiepiphytica; internodia adulta (2-)7-20 cm longa, 1-3 cm diam., caulis cum fissuris tenuibus transversalis; cataphylla 2-costata, 11-13(-15) cm longa, decidua; petioli (20-)25-35(-51) cm longi, 0.5-0.8 cm diam., teretes vel U-formati; laminae ovato-cordatae vel anguste sagittatae vel oblongo-cordatae, 20-47 × 11-26 cm; venas basales (3-)4-5 utroque; nervis primariis lateralibus 7-10 utroque; inflorescentiae 1-2 in quoque axilla; pedunculus 2.5-5(-6.5) cm longus; spatha 8-16 cm longa, viridis, flavovirescens vel rubra, tubus rubellus extus, rubri-purpureus intus; spadix 7.9-12.8 cm longus; parte pistillata 4.5-5.8 cm longa.

Ecology

Philodendron longirrhizum is known from the Western, Central and Eastern Cordillera of Colombia and from the Cordillera de Mérida in Venezuela, occurring at 1650 to 2500 m elevation in montane tropical forests (Holdridge 1967). Philodendron longirrhizum has been collected in flower in October to March and in fruit in May.

Distribution Map

 
  • Native distribution
Specimens
Found in
  • Southern America Northern South America Venezuela
  • Western South America Colombia

  Bibliography

  • 1 Govaerts, R.H.A. (2011). World checklist of selected plant families published update. Facilitated by the Trustees of the Royal Botanic Gardens, Kew.
  • 2 Mora, M. & Croat, T.Bernard Philodendron longirrhizum (Araceae), a new montane species from Colombia and Venezuela. Willdenowia. Mitteilungen aus dem Botanischen Garten und Museum Berlin-Dahlem. Berlin-Dahlem 37, 545 (2007).

 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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