Many thanks sir for detail explanation. The paper is also very very useful and informative.
Regards prasad On Sat, Nov 5, 2011 at 6:26 AM, Ushadi micromini <[email protected]>wrote: > Very nice pappus.. > > nice to be able to hold and it not fly away from the slight breeze > created by breathing ... > > I find it very difficult to id lactuca ( very common in disturbed > soils in NY) from sowthistle : Sonchus.. > the flowers and leaves are very ( :) irritatingly similar ) ... > does this mean wait till fall to id the plants? > when the seedheads appear? > > Usha di > === > > On Nov 4, 4:02 pm, Madhuri Raut <[email protected]> wrote: > > Thank you Sir ji for explaining the details > > > > > > > > > > > > > > > > > > > > On Fri, Nov 4, 2011 at 3:57 PM, Gurcharan Singh <[email protected]> > wrote: > > > Madhuri ji, interestingly it is not achene in the real sense, but a > term > > > very commonly used in this family. The fruit type is actually cypsella > > > (formed from two united carpels with inferior ovary, dry fruit > containing > > > single seed). The real achene is found in Ranunculaceae. in Ranunculus, > > > Anemone, Clematis, etc. carpels are free and single seeded dry fruit is > > > formed from single carpel. In other genera, Delphinium, Aquilegia, > etc., > > > each free carpel contains more than one ovule, and fruit matures into > > > follicle. > > > > > -- > > > Dr. Gurcharan Singh > > > Retired Associate Professor > > > SGTB Khalsa College, University of Delhi, Delhi-110007 > > > Res: 932 Anand Kunj, Vikas Puri, New Delhi-110018. > > > Phone: 011-25518297 Mob: 9810359089 > > >http://people.du.ac.in/~singhg45/ > > > > > On Fri, Nov 4, 2011 at 3:48 PM, Madhuri Raut <[email protected]> > wrote: > > > > >> Thank you Sir ji for the paper. Very nice paper on key to the genera > > >> based on achene characters. And yes today I learned a new word in > Botany > > >> 'achene' meaning single-seeded fruits .Thank you > > > > >> On Fri, Nov 4, 2011 at 3:00 PM, Gurcharan Singh <[email protected] > >wrote: > > > > >>> Thanks a lot Madhuri ji. The last photograph is very useful for this > > >>> group of steraceae. In fact one can identify the plant only from > this. Here > > >>> is my paper on this published in 1972. > > > > >>> -- > > >>> Dr. Gurcharan Singh > > >>> Retired Associate Professor > > >>> SGTB Khalsa College, University of Delhi, Delhi-110007 > > >>> Res: 932 Anand Kunj, Vikas Puri, New Delhi-110018. > > >>> Phone: 011-25518297 Mob: 9810359089 > > >>>http://people.du.ac.in/~singhg45/ > > > > >>> On Fri, Nov 4, 2011 at 2:54 PM, Madhuri Raut <[email protected]> > wrote: > > > > >>>> Sir ji, > > >>>> Very beautiful set of photographs. esp > *Lactuca-scariola-Balgarden-Kashmir-3-DSC06662.jpg > > >>>> and the one showing *dehiscence. Never seen something like this > > >>>> before.Thank you Prasad ji for mentioning the word. I was waiting > for > > >>>> someone to mention it so that I can share my appreciation too as I > did not > > >>>> know how to describe it. > > > > >>>> On Fri, Nov 4, 2011 at 2:45 PM, Gurcharan Singh <[email protected] > >wrote: > > > > >>>>> Thanks Prasad ji > > > > >>>>> -- > > >>>>> Dr. Gurcharan Singh > > >>>>> Retired Associate Professor > > >>>>> SGTB Khalsa College, University of Delhi, Delhi-110007 > > >>>>> Res: 932 Anand Kunj, Vikas Puri, New Delhi-110018. > > >>>>> Phone: 011-25518297 Mob: 9810359089 > > >>>>>http://people.du.ac.in/~singhg45/ > > > > >>>>> On Fri, Nov 4, 2011 at 2:42 PM, prasad dash < > [email protected] > > >>>>> > wrote: > > > > >>>>>> Sit to me both DSC06683 and DSC06267 are awesome. Never seen such > a > > >>>>>> wonderful phorograph (DSC06267) of dehiscence. > > > > >>>>>> Regrads > > > > >>>>>> prasad > > > > >>>>>> * * > > > > >>>>>> On Fri, Nov 4, 2011 at 2:14 PM, Gurcharan Singh < > [email protected]>wrote: > > > > >>>>>>> *Lactuca serriola* L., Cent. pl. II:29. 1756 (Amoen. acad. 4:328. > > >>>>>>> 1759) > > >>>>>>> syn: *Lactuca scariola* L.; *Lactuca augustana* All. > > > > >>>>>>> Common name: Prickly lettuce > > > > >>>>>>> Tall prickly herb reaching 1.5 m, branched, prickly towards > base; > > >>>>>>> leaves sessile, pinnatifid with toothed segmrnts pointing > downwards, > > >>>>>>> prickly on midrib and nerves beneath, upper leaves stem-clasping > with > > >>>>>>> arrow-shaped base; heads yellow, 9-12 mm in diam., in long > panicles with > > >>>>>>> spreading branches; involucre bracts oblong; achene brown nearly > 3 mm long > > >>>>>>> with slender almost as long longer beak, pappus hairs white. > > > > >>>>>>> Very common in Kashmir valley in wastelands, borders of fields > and > > >>>>>>> road sides , photographed from Balgarden and University Campus > in August. > > > > >>>>>>> -- > > >>>>>>> Dr. Gurcharan Singh > > >>>>>>> Retired Associate Professor > > >>>>>>> SGTB Khalsa College, University of Delhi, Delhi-110007 > > >>>>>>> Res: 932 Anand Kunj, Vikas Puri, New Delhi-110018. > > >>>>>>> Phone: 011-25518297 Mob: 9810359089 > > >>>>>>>http://people.du.ac.in/~singhg45/ > > > > >>>>>> -- > > >>>>>> Prasad Kumar Dash > > >>>>>> Ecologist, Orissa, India > > >>>>>> email: [email protected] > > >>>>>> ph. 09437444241 > > > > >>>> -- > > >>>> Regards > > >>>> Dr.Bhagyashri Ranade > > > > >> -- > > >> Regards > > >> Dr.Bhagyashri Ranade > > > > -- > > Regards > > Dr.Bhagyashri Ranade > -- Prasad Kumar Dash Ecologist, Orissa, India email: [email protected] ph. 09437444241
