Asteraceae Fortnight Part 3-Ligulate heads (plus Misc.): Achene is the Key : sk04

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surajit koley

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Jul 10, 2013, 1:59:31 PM7/10/13
to efloraofindia
Well, no picture here, only key, in "Bengal Plants".

  • achenes beaked and also contracted at the base.... fusiform or oblong ----- Crepis
  • achenes beaked and also contracted at the base.... compressed or flattened ------ Lactuca
  • achenes not beaked; narrowed at base, truncate at apex; oblong with 4-5 rugose ribs ------ Picridium
  • achenes not beaked; narrowed at base, truncate at apex; compressed, many ribbed ------ Sonchus
  • achenes truncate at base as well as apex ------- Launaea
A few links (based on "Bengal Plants") -
  1. Pappus hairs feathery = Picris = http://plantillustrations.org/illustration.php?id_illustration=35117
  2. Crepis acaulis Hook.f. = http://www.plantillustrations.org/illustration.php?id_illustration=86622 and http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=200024129
  3. Lactuca sativa L. = a cabbage like herb = http://plantillustrations.org/species.php?id_species=581123
  4. L. polycephala Benth. = http://www.efloras.org/object_page.aspx?object_id=120772&flora_id=2 (fig2) and http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=200024077
  5. Picridium tingitanum Desf. = http://plantillustrations.org/species.php?id_species=870952
  6. Sonchus = https://sites.google.com/site/efloraofindia/system/app/pages/search?scope=search-site&q=sonchus
  7. Lauanea aspleniifolia Hook. f. = https://groups.google.com/d/msg/indiantreepix/bMigjkJMFT0/5bJAguqJUBIJ ???
  8. Lauanea nudicaulis Less. = Prenanthes procumbens Roxb. = http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=242328624
  9. Lauanea pinnatifida Cass. = http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=200024130 and http://plantillustrations.org/illustration.php?id_illustration=45016
Thank you
Regards

Satish Phadke

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Jul 11, 2013, 6:28:18 AM7/11/13
to surajit koley, efloraofindia
Thanks for the efforts Surajit ji
We have received very few pictures of Achenes. Why can't we have some good pictures of achenes showing at least some characters clearly? I request all members to post some close-ups of achenes.....

Dr Satish Phadke



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surajit koley

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Jul 11, 2013, 11:44:28 AM7/11/13
to Satish Phadke, efloraofindia
Satish Sir

The key on achenes must have modified lately. e.g. Crepis acaulis is now Launaea acaulis. Latest (?) key can be found in FoC - http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=20701

Thank you
Regards
surajit
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