Cycas zeylanica (J.Schust.) A.Lindstr. & K.D.Hill, Novon 12: 238 2002. (Syn: Cycas rumphii subsp. zeylanica J.Schust.);
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Cycas zeylanica:
Photo: 2011-01-08
Elephant Beach, Havelock, Andaman Islands
Cycas zeylanica (J. Schust.) A. Lindstr. & K.D. Hill, Novon 12(2): 238-239 (2002). L – G
more info: http://plantnet.rbgsyd.nsw.gov.au/Cycas+zeyla…


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Gymnosperm Fortnight : For ID : Lalbagh,Bangalore : 091213 : AK-4 : Attachments (3).  10 posts by 6 authors.
Tree seen at the Lalbagh Botanical Gardens, Bangalore on 24/11/13.
Kindly id.

Looks like Cycas rumphii


I think NO.


If not Cycas rumphii, what would be the correct id?


I am aware of the current nomenclature of Cycas rumphii. I saw it growing wild in the Andamans everywhere during my six years tenure there.


I dont know how authentic this is, but hope it helps.
http://www.plantapalm.Cycas-rumphii-vs-Cycas-circinalis.pdf


I think it represents Cycas zeylanica


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This species closely similar to C. circinalis but distinctly narrowed vegetative tip of megasporophyll without distinct teeth was earlier thought by me to be C. rumphii, but recent paper on Indian species of Cycas suggests that C. rumphii does not grow in India. Could it be C. indica or C. zeylanica.
rbgsyd.nsw.pdf

Cycas species in efi


Cycas zeylanica (J.Schust.) A.Lindstr. & K.D.Hill


What is the basis?


There are hardly any details (except leaves) in the specimens.


C. zeylanica, see my upload from Lal Bagh Bangalore just now, Thanks … for suggesting
Cycas zeylanica from Lal Bagh Bangalore-GS04022022-1 (google.com)


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It is my pleasure to share few images of Cycas rumphii (Cycadaceae

Ref: http://www.theplantlist.org/tpl1.1/search?q=cycas+rumphii

Ref: http://www.flowersofindia.CeylonSagoPalm.html

Ref: http://florakarnataka.ces.iisc.ernet.in/hjcb2/herbsheet.php?id=10&cat=2

Habit: Palm

Habitat: Cultivated

Sighting: Bangalore, Karnataka, about 800 msl

Date: 08-03-2016


Abundant in the Andamans with edible seeds.


…, thanks for the info. The Digital Flora of Karnataka says that it is native to Indonesia and Papua New Guinea and it is nearly threatened…!
Ref: http://florakarnataka.ces.iisc.ernet.in/hjcb2/herbsheet.php?id=10&cat=2


The occurrence of the plant in the Andamans is a natural extension of range of this Malesian species. It is very common from coastal to inland forests in all the Islands I have visited.


As per Cycads of India, we don’t have this species in India (at least in the wild). We have no accepted postings of this so far on this in efi.

In view it has to be checked again.
From comparative images at Cycas, it seems to match with Cycas pschannae R.C. Srivast. & Lalji Singh sp. nov.
Request experts to pl. help.

In fact a specimen from PBL was sent to L long back for identification and they identified the same as Cycas rumphii.  Since then we are calling the bulk of the Andamans collections (the commonest species there) as C. rumphii also in use by the local tribes. It is clearly included in the CITIS List as a valid species (http://www.bsienvis.nic.in/CITES/Cycasrumphii.pdf). C. rumphii is indeed sometimes treated as a synonym of C. circinalis but this needs clarification by Cycad experts. The book on the Cycads of India overlooked the species and never mentioned about it. The author probably never visited the Andamans and observed. Fully grown trees are available even at Dhanikhari garden. The species, C. pschannae appears to be dubious. It was described on the basis of a cultivated plant in the AJC Bose IBG, introduced from the Andamans. They observed the plant growing in the Islands but never collected a specimen and cited in the protologue. In my opinion, it is very similar to C. rumphii and may ultimately be united with it.
I take it as Cycas rumphii unless otherwise clarified by the experts on Cycads.
Attachments (4) – Cycas channae.pdf, Cycas rumphii.pdf, The_Cycas_rumphii_complex, The_genus_Cycas__Cycadaceae.


Thank you very much, …, for details analysis & reasoning.
It is always nice to hear from experts like you.

C. zeylanica, see my post today
Cycas zeylanica from Lal Bagh Bangalore-GS04022022-1 (google.com)


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Cycas zeylanica from Lal Bagh Bangalore-GS04022022-1: 4 very high res. images.

Cycas zeylanica (J. Schust.) A. Lindstrom & K.D. Hill, Novon 12(2): 238–239 (2002)
Syn: Cycas rumphii subsp. zeylanica J. Schust.
        Cycas rumphii Auct Plur,; Trimen 1898; Rendle 1900, Raizada & Sahni 1960
The species has often gone in Indian treatments under the name C. rumphii, which does not occur in India; It has also been confused with C. circinalis and C. indica. The three can be distinguished as under:
1. C. circinalis: Seed lacking spongy endotesta; Megasporophyll 20-35 cm long, apical spine of megasporophyll distinctly different from lateral spines, 14-34 mm long, lateral spines 10-28, pungent, 1-4 mm long. ovules 4-14.
2. C. indica: Seed lacking spongy endotesta; Mrgasporophyll 18 cm long, apical spine of megasporophyll not distinctly different from lateral spines, 1–3 mm long, lateral spines less than 10, 2 mm long.
C. C. zeylanica: Seed with spongy endotesta; Megasporophyll 17-30 cm long, apical apical spine 40-60 mm long, 6-12 lateral bumps or          spines less than 2 mm long; 0vules 2-4.
Photographed from Lal Bagh, Bangalore, 29-9-2015



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References:

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