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

[surajit koley]

Well, no picture here, only key, in "Bengal Plants".

I need this to resolve my post - https://groups.google.com/forum/?hl=en&fromgroups#!topic/indiantreepix/bMigjkJMFT0.

• 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]

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]

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