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
