Thank you Chris ji for detailed information. Thanks and regards Alka Khare
On Wednesday, December 21, 2016 at 9:38:20 AM UTC+5:30, JM Garg wrote: > Thanks, Chris ji > ---------- Forwarded message ---------- > From: "Chris Fraser-Jenkins" <[email protected] <javascript:>> > Date: 21 Dec 2016 9:34 a.m. > Subject: Re: Fwd: [efloraofindia:259630] Fern for ID :: Thane :: ARKDEC20 > To: "J.M. Garg" <[email protected] <javascript:>> > Cc: > > It's a very common and remarkably widespread adventive pteridaceous fern, > Pityrogramma calomelanos, originally S. and C. American, but now spread > allover the world. In India there are very few records in the 19th > Century, but masses now. It seems to have come in via S. and peninsular > India and Lanka - quite possibly by cultivation as an attractive ornamental > fern, but now it is all over everywhere - even in the most remote > inner-Himalayan valleys and up to highish altitude. It seems to be one of > those whose spores are spread on clothing as people brush past it as it > grows besides paths etc. > There is a more attractive species too in South India, also a S. American > adventive, as the name suggests, P. austroamericana, with golden-yellow > farina beneath and a slightly smaller, less dissect frond - but not (yet!) > spread to northern India, for reasons I don't know. And Sri Lanka also has > two further adventive American species of the genus. Each species has > different flavinoid compounds constituting the white or yellow farina > (Prof. Eckhard Wollenweber's findings at Darmstadt University). > As one can guess, it is no tree-fern! I imagine somebody who knew less > than a little about ferns observed the white farina beneath the frond, saw > the name Cyathea dealbata and put 2 and 2 together to make 5! The same > trouble happens widely with our dozen or more white (or yellow)-powdered > Aleuritopteris species, all of which pop up under the name "Aleuritopteris > (Cheilanthes) albomarginata" in herbaria and publications - accounting for > Plains and peninsular records, such as lower West Bengal foothills "A. > albomarginata", whereas true A. albomarginata is rather a higher > Himalayan-range species! As for "Polystichum auriculatum" - well, which > species of Polystichum are not auriculate!?! > Cheers, > Chris F.-J., Kathmandu. > > > ------------------------------ > *From:* J.M. Garg <[email protected] <javascript:>> > *To:* efloraofindia <[email protected] <javascript:>> > *Cc:* Alka <[email protected] <javascript:>> > *Sent:* Tuesday, 20 December 2016, 18:59 > *Subject:* Fwd: [efloraofindia:259630] Fern for ID :: Thane :: ARKDEC20 > > Thanks, Alka ji > ---------- Forwarded message ---------- > From: "Alka Khare" <[email protected] <javascript:>> > Date: 20 Dec 2016 2:31 p.m. > Subject: [efloraofindia:259630] Fern for ID :: Thane :: ARKDEC20 > To: "efloraofindia" <[email protected] <javascript:>> > Cc: > > Hello friends > > This fern was found in a cultivated garden in Thane in December 2016. Name > provided was Cyathea dealbata. > > Requested to please validate. > > Thanks and regards > Alka Khare > > -- > You received this message because you are subscribed to the Google Groups > "efloraofindia" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to indiantreepi...@ googlegroups.com <javascript:>. > To post to this group, send email to [email protected] > <javascript:> . > Visit this group at https://groups.google.com/ group/indiantreepix > <https://groups.google.com/group/indiantreepix>. > For more options, visit https://groups.google.com/d/ optout > <https://groups.google.com/d/optout>. > > > -- You received this message because you are subscribed to the Google Groups "efloraofindia" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send an email to [email protected]. Visit this group at https://groups.google.com/group/indiantreepix. For more options, visit https://groups.google.com/d/optout.
