OK, many thanks Gurcharan ji ... will keep an eye open to get this aspect covered during next sighting. Regards. Dinesh
On Thu, Jan 26, 2012 at 6:25 PM, Gurcharan Singh <singh...@gmail.com> wrote: > Dinesh ji > It is true that the three species are very close, Gnaphalium purpureum, G. > pensylvanica are shifted to genus Gamochaeta on the basis of pappus being > connate at the base, whereas in Gnaphalium they are free at base and fall > individually. > > A feature that separates Gnaphalium purpureum in addition to free pappus > hairs is that heads form an elongated spike each cluster not subtended by > ordinary leaves. To that extent your plant may be G. polycaulon. > > This is what Flora of China writes about G. polycaulon > > "Similar to *Gamochaeta pensylvanica*, this species differs by its more > compact habit, oblanceolate leaves, and free, separately deciduous pappus > bristles more dilated at apex." > > > http://www.zhiwutong.com/dan_tu/7/6243.htm > > > Perhaps checking pappus hairs may be conclusive. > > I am attaching photograph of pappus hairs of Gamochaeta pensylvanica for > comparison > > > -- > 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 Thu, Jan 26, 2012 at 1:00 PM, Dinesh Valke <dinesh.va...@gmail.com>wrote: > >> Many thanks again Gurcharan ji. >> Looking through books of Shrikant ji for *Gnaphalium *... the Further >> Flowers of Sahyadri illustrates *Gnaphalium polycaulon* Pers. and *Gnaphalium >> luteo-album*. >> >> And my posted plant fits description of *Gnaphalium polycaulon*, the >> flowering period. >> >> Please correct me if wrong. >> >> Regards. >> Dinesh >> >> >> >> >> >> >> >> >> On Thu, Jan 26, 2012 at 12:38 PM, Gurcharan Singh <singh...@gmail.com>wrote: >> >>> Looking at leaves in your plant being more greener on upper surface and >>> distinctly whitish on lower and lax low clusters your plant may be G. >>> purpurea. Here is my G. pensylvanica >>> >>> http://www.flowersofindia.in/catalog/slides/Pennsylvania%20Cudweed.html >>> >>> >>> -- >>> 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 Thu, Jan 26, 2012 at 12:18 PM, Dinesh Valke >>> <dinesh.va...@gmail.com>wrote: >>> >>>> Many many thanks Gurcharan ji for this help with ID. >>>> Have sighted this herb many times earlier; was eager to know the plant. >>>> >>>> Regards. >>>> Dinesh >>>> >>>> >>>> >>>> >>>> >>>> On Thu, Jan 26, 2012 at 11:49 AM, Gurcharan Singh >>>> <singh...@gmail.com>wrote: >>>> >>>>> Dinesh ji >>>>> It is Gamochaeta (formerly Gnaphalium), probably G. purpureum or G. >>>>> pensylvanicum ( American weed, often confused with G. purpureum, recently >>>>> become common in Delhi and other parts of India). Here is how you can >>>>> separate them >>>>> >>>>> Leaf surfaces of different colour, upper white hairy, lower almost >>>>> glabrous; >>>>> basal leaves persistent at anthesis; inflorescence spicate, lower >>>>> glomerules of heads often >>>>> pedunculate..............................................G. purpurea >>>>> Leaf surfaces not markedly different; basal leaves withered at >>>>> anthesis; >>>>> heads in spicate panicles, densely wooly 2/3 from >>>>> base....................G. pensylvanica >>>>> >>>>> -- >>>>> 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 Thu, Jan 26, 2012 at 12:24 AM, Dinesh Valke <dinesh.va...@gmail.com >>>>> > wrote: >>>>> >>>>>> Dear friends ... ID please. >>>>>> *Place*: at top of Ratangad (~ 754 m / 2473 ft asl), near >>>>>> Bhandardara, Maharshtra. >>>>>> *Time*: January 14, 2012 at 12.27pm >>>>>> *Habit*: tender prostrate herb, about 6" - 10" high >>>>>> *Habitat*: damp bed of a drying pond >>>>>> >>>>>> *Flower head size*: about 2 - 3 mm >>>>>> >>>>>> >>>>>> Regards. >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>> >>> >>> >>> >> > > > >
