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Aristolochia croatica; Croatian Birthwort   

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Aristolochia croatica
Aristolochia croatica
Croatian Birthwort
Photographer: Dr. Amadej Trnkoczy

ID: 0000 0000 0515 1673 (2015-05-16)

Copyright © 2015 Dr. Amadej Trnkoczy

  • date of photo  Apr 29, 2015
  • latitude 45.09826   longitude 14.47127     View on Google Maps.
  • location   Slightly inside the island at the end of the dirt road from village Poljica to the sea shore, east of a small pebble beach, west island Krk, Adriatic Sea (Kvarner bay, Croatia)
  • notes   Slo.: hrvaški podraščec - syn.: Aristolochia lutea Desf.(?), Aristolochia pallida ssp. croatica (?) - Habitat: Light deciduous forest with bushes and small open patches of grassland; almost flat calcareous terrain, half sun, dry place, exposed to direct rain; elevation 25 m (85 feet), average precipitations 1.000 - 1.200 mm/year, average temperature 13 - 15 deg C, submediterranean phytogeographical region. - Substratum: brown soil. - Comment: This species, if correctly determined, is a narrow endemic plant of Adriatic island Pag and its surrounding (Ref.:1) including island Krk (Ref.:6.). Its taxonomical status is not yet agreed upon and thus differently interpreted. Some authors consider this plant as a subspecies of Aristolochia pallida (Domac (2002), Ref.:1), others, for example Tutin et all (eds.) (1993) (Ref.:2) consider the name Aristolochia croatica simply a synonym for Aristolochia lutea. In addition, historically, the name Aristolochia pallid has been used also for Aristolochia lutea (homonym) by different authors. All this makes determination difficult. - My determination is based on information given in Ref.6. (assuming the data base is up-to-date). Plant distribution maps show that Aristolochia lutea Desf. has not been recorded yet on island Krk, while Aristolochia croatica has been recorded several times, however not in this particular MTB square. Also herbarium specimens shown in this data base are very similar to the plans found. Morphologically they differ significantly from Aristolochia pallida Willd. in two traits: they have much shorter limb (it should be about as long as perianth tube with ratio limb/tube between 0.9 and 1.1 according to Ref.:4, while average found was less than one half of this - 0.43, n = 9. Also petioles are too short. With Aristolochia pallida Willd. they should be significantly longer than flower stalks but the plants found have short petioles of approximately the same length as flower stalks.On the other side, Aristolochia lutea should have very short limb, usually not much longer than the diameter of the opening of the perianth tube. Also this doesn't seem the case with the plants photographed. Thus I hope that my determination is correct. - Ref.: (1) R. Domac, Flora Hrvatske, Priručnik za određivanje bilja (Flora of Croatia, Key of plants), Školska Knjiga, Zgreb, II. izdanje (2002), p 90. (2) T. G. Tutin, V.A. Heywood et all (eds.), Flora Europaea, Cambridge (1993) - (3) M. Blamey, C. Grey-Wilson, Wild Flowers of the Mediterranean, A & C Black, London (2005), p 37. (4) A. Martinči et all., Mala Flora Slovenije, Tehnična Založba Slovenije (2007) (in Slovene), p 120. (5) D. Aeschimann, K. Lauber, D.M. Moser, J.P. Theurillat, Flora Alpina, Vol. 1., Haupt (2004), p 116. (6) Vascular Plant Taxonomy & Bibliography of Croatian Flora (FCD), Faculty of Science, Botany, University of Zagreb - http://hirc.botanic/fcd/
  • camera   Canon G11, 6.1-30mm/f2.8-4.5
  • contributor's ID #  Bot_872/2015_DSC6281
  • photo category: Plant - annual/perennial

  • common names   Croatian Birthwort (photographer)
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  • The photographer's identification Aristolochia croatica has not been reviewed. Click here to review or comment on the identification.

    Using this photo   The thumbnail photo (128x192 pixels) on this page may be freely used for personal or academic purposes without prior permission under the Fair Use provisions of US copyright law as long as the photo is clearly credited with © 2015 Dr. Amadej Trnkoczy. For other uses, or if you have questions, contact Dr. Amadej Trnkoczy amadej.trnkoczy[AT] (Replace the [AT] with the @ symbol before sending an email.)


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