Thank you Dr Chris. Is there anything I can do in the absence of a chromosome count to get a clearer picture?
Regards, Ashwini On 10-Dec-2014, at 11:03 am, Chris Fraser-Jenkins <[email protected]> wrote: > Hello Ashwini, > Yes, this is P. cretica - which has two slightly different and > cytologically different subspecies, recognisable from the teeth on the > sterile fronds. My general impression is that this might perhaps be subsp. > laeta, the triploid, which would be interesting as subsp. cretica (diploid) > is supposed to be more common in the west. But I'm not very confident in > this case, as some parts show the more regular teeth of subsp. cretica. If > only one of Dr. Khullar's students at Panjab Univ. could get a chromosome > count of this plant (unfortunately they don't do mititoic counts from > root-tips), it would be helpful to me to adjust taxonomic concepts of the > frond-morphology of the two subspecies. > The wavy edges are like subsp. laeta - but on second thoughts I think > those marginal teeth are too regular, so perhaps subsp. cretica is more > likely after all! Difficult! If I had it in hand I might be able to get a > better impression. Both subspecies are common. > Cheers, > Chris F.-J. > > From: Ashwini Bhatia <[email protected]> > To: Chris Fraser-Jenkins <[email protected]> > Sent: Tuesday, 9 December 2014, 21:32 > Subject: Fwd: Pteris cretica?/ABDEC22 > > > > Begin forwarded message: > >> From: Ashwini Bhatia <[email protected]> >> Subject: Pteris cretica?/ABDEC22 >> Date: 9 December 2014 5:43:17 pm IST >> To: efloraofindia <[email protected]> >> >> This simple and common fern grows in clusters. Stipes are dark at base and >> lighter green above. They are grooved on upper surface. >> >> I am not sure if it is Pteris cretica. >> Mcleodganj, Dharamshala, HP >> 07-08 December 2014 >> >> Thanks. >> Ashwini >> >> <IMG_1348_09Dec14.jpg><IMG_1487_09Dec14.jpg><IMG_1491_09Dec14.jpg> >> >> Most have three pair of simple pinnae with the bottom pair extra-winged. The >> longest pinna is at the apex. The edges are sharply serrated and >> parallel/forked veins are clearly defined around a protruding costa on >> underside. >> >> <IMG_1474_09Dec14.jpg><IMG_1488_09Dec14.jpg> >> <IMG_1482_09Dec14.jpg> > > > > <IMG_1491_09Dec14.jpg><IMG_1474_09Dec14.jpg><IMG_1348_09Dec14.jpg><IMG_1487_09Dec14.jpg><IMG_1488_09Dec14.jpg><IMG_1482_09Dec14.jpg> -- 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 email to [email protected]. Visit this group at http://groups.google.com/group/indiantreepix. For more options, visit https://groups.google.com/d/optout.
