Thank you very much Mr Swamy.
On 08-Feb-2018 10:51 AM, "J.M. Garg" <jmga...@gmail.com> wrote:
On 08-Feb-2018 9:25 AM, "Mahadeswara" <swamy.c...@gmail.com> wrote:
> Beautiful photographs depicting all plant parts and excellent observation
> On Tuesday, February 6, 2018 at 8:07:52 PM UTC+5:30, ashwini wrote:
>> This is another difficult genera I am trying to understand. The plants I
>> studied have spiny leaves, red-tipped glandular hair on stems and
>> phyllaries, 2-2.5cm flower-heads and wrinkled, ridged 4mm-long achenes.
>> While the spikes on leaves point to *S. asper*, the downward-pointing
>> auricles point to *S. oleraceous*.
>> *I counted the involucral bracts on two heads and found them to be 34 and
>> 21*, both less than 35. *S. asper* is supposed to have 35 to 45
>> involucral bracts while *S. oleraceous* only up to 35. Another point in
>> favour of *oleraceous*.
>> *The ripe achene on oleraceous is supposed to be 4mm long with
>> longitudinal ridges with protuberances which matches our plants*. The
>> hair on its head are white and unbranched about twice as long as the
>> achene. My close-ups show the hair themselves are not smooth but I could
>> not find any reference to that.
>> Based on the two above characters and the flower size, I am inclined to
>> believe that our plants are *S. oleraceous* and not *S. asper* but I
>> haven't seen the achenes of *S. asper* to compare. The achenes of *S.
>> wightianus* on our site
>> look very similar to the ones I photographed, so I am confused.
>> Please advise.
>> *Sonchus oleraceous*?
>> Above Mcleodganj, Dharamshala, HP
>> 1800m approx.
>> 3-5 February, 2018
>> Habit: 95cm tall, well-branched
>> Flowers: Several, 2-2.5cm across, on pedicels 1.5-8cm long, involucral
>> bracts less than 35 (based on two measurements which were 21 and 34)
>> Fruit: Achenes 4mm long, translucent when unripe, brown when ready,
>> ridged and rugose, tipped with white unbranched hair twice long.
>> Leaves: Lobed, spiked, amplexicaul with two auricles pointing downwards,
>> not rounded.
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