{"id":1400760,"date":"2016-06-13T13:51:44","date_gmt":"2016-06-13T13:51:44","guid":{"rendered":""},"modified":"2024-12-24T18:24:50","modified_gmt":"2024-12-24T12:54:50","slug":"arenaria-thangoensis","status":"publish","type":"ht_kb","link":"https:\/\/efloraofindia.com\/efi\/arenaria-thangoensis\/","title":{"rendered":"Arenaria thangoensis"},"content":{"rendered":"
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Arenaria<\/i> thangoensis<\/i> W.W.Sm., Rec. Bot. Surv. India 4: 180 1911<\/i>. ;<\/span><\/span>
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<\/span><\/span>Arenaria thangoensis (Caryophyllaceae) rediscovered: June 2016_DSR_1\/1<\/a> : 8 posts by 7 authors. Attachments<\/span> (<\/font>3<\/font><\/span>)<\/font><\/span><\/span><\/span><\/span><\/div>\n

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World environment day is appropriate time to inform our eFI family that in last year\u2019s botanical exploration we managed to rediscover a threatened endemic species from a remote Himalayan locale after nearly 106 years.<\/font><\/div>\n
Arenaria thangoensis <\/i><\/font>W.W.Sm<\/font><\/a>. (Caryophyllaceae) is a tiny plant and this species was described <\/sup><\/font>in 1911 from Tangu (Thangu) area of Sikkim in the Eastern Himalaya. <\/font>This species was never recollected after type collection either from type locality or anywhere in the Himalaya or Tibet and, therefore, known by the type collection only (<\/font>Srivastava et al. 2015<\/font><\/a>). During a floristic exploration in the Kuari Pass alpine zone (3600-3700m above sea level, Chamoli district, Uttarakhand), which happens to be the type locality of \u2018Endangered and endemic\u2019 Arenaria curvifolia<\/i> Majumdar, my student Satish collected Arenaria thangoensis.<\/i> This collection is a rediscovery of this threatened species after 106 years and demonstrates that it is an extant (living) species and thriving well in the area. Rediscovery from nearly 950 km (aerial distance) away from its originally known population makes it more interesting.<\/font><\/font><\/div>\n
Image of the species attached here is a first ever photo of live specimens of this species in the world.<\/font><\/div>\n
Rediscovering a species is a joy for me and sharing it with ardent nature lovers of eFI fraternity increases it manifolds. <\/font><\/div>\n
This rediscovery is yet not published, though in communication with a journal.<\/p>\n
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Nice to read about the rediscovery. Thanks for sharing<\/p>\n

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No better way to celebrate World Environment day.<\/div>\n
Thanks, Rawat ji for telling us in a nice way.<\/p>\n
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Thank you…. In fact it is Satish (my student) who deserve appreciation for this botanical exploration.
Your nice words give me strength in the arduous terrains of the Himalaya.<\/p>\n

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Celebrating this day could not have been better …<\/p>\n
Congratulations to young explorer Satish Chandra.. who is\u00a0following your footsteps, this is really a gift to discover a threatened plant after such a huge gap…many thanks for sharing these rarest pics !!<\/p>\n
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Attaching here the publication related to this rediscovery. Attachments<\/span> (<\/font>1<\/font><\/span>)<\/font><\/span> – Arenaria thangoensis.pdf<\/p>\n

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Naturally read this with interest.\u00a0Checked with Flora of Bhutan Vol 1 Part 2 which covers Caryophyllaceae<\/i>.
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The authors have A.thangoensis<\/i> W.W.Smith (and A.pharensis<\/i> McNeil & Majumbar) only as a synonym of Arenaria littledalei<\/i> Hemsley.\u00a0What are your thoughts about this?\u00a0This account for Caryophyllaceae<\/i> of the region (incl. Sikkim and Chumbi) was published back in 1984.
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This taxon was recorded from Sikkim (Chugya, Naku Chu and Thango) plus Chumbi (Phari plain) @ 4360-4570.<\/font><\/div>\n
I see that ‘The Plant List’ accept A.littledalei<\/i> and A.thangoensis<\/i> as separate species.<\/div>\n
There are specimens of A.littledalei<\/i>\u00a0(from Central Tibet and Sikkim) in the Kew herbarium, see: <\/div>\n
http:\/\/apps.kew.org\/herbcat\/<\/font>getImage.do?imageBarcode=<\/font>K000723882<\/font><\/a>;\u00a0 and <\/div>\n
http:\/\/apps.kew.org\/herbcat\/<\/font>getImage.do?imageBarcode=<\/font>K000723881<\/font><\/a>
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Please explain how these differ from A.thangoensis<\/i>?<\/p>\n
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Flora of Bhutan have taken a broad circumscription of A. littledalei<\/i> giving no consideration to merosity of flowers (sepals-5 in A.pharensis<\/i> while sepals 4 in A.littledalei<\/i>) considering it as a variation; thus merging these species into A. littledalei<\/i>. It is very similar to the case of Cotoneaster<\/i> genus where Fryer consider up to 400 species worldwide while broader circumscription gives 50-70 species in world. (Pl. See note in Flora of Nepal at- http:\/\/www.floraofnepal.org\/<\/font>page\/onlineflora?wildcard=1051<\/font><\/a>). All these species mentioned by you (A.pharensis<\/i> (=Goringia pharensis<\/i>), A.littledalei<\/i>, and few others from China like A.reducta<\/i>, A. saginoides<\/i> etc are closely related to each other and belong to subgenus Odontostemma<\/i> section \u2018Reductae<\/i>\u2019 (mentioned in some Chinese works). These species are included and differentiated in Flora of China<\/font><\/a>.<\/div>\n
Arenaria thangoensis<\/i> is now known as Odontostemma thangoensis<\/i><\/b> (pl. See http:\/\/www.ipni.org\/ipni\/<\/font>idPlantNameSearch.do?id=<\/font>77155319-1&output_format=lsid-<\/font>metadata&show_history=true<\/font><\/a>) after a recent splitting of Arenaria<\/i> genus following the molecular studies.\u00a0<\/div>\n
A.thangoensis<\/i> is close to A. pharensis<\/i> (a 5-sepal species) <\/font>but differ from it by one line of hairs on stem<\/font> (2 in A.pharensis<\/i>),<\/font> leaves biconvex, succulent, obovate to oblanceolate<\/font> (linear to linear lanceolate in A.pharensis<\/i>),<\/font> 2-5 stamens<\/font> (2-3 in A.pharensis<\/i>).<\/font> However, these characters are not very convincing and a revision of this Sino-Himalayan group of Arenaria<\/i> is needed. It is worth mentioning here that no species of this group (baring A.thangoensis <\/i>recorded by us) are known from Indian western Himalaya.<\/div>\n
Finally, the type specimens (Holo and iso) collected by Smith and Cave in 1909 are in Central National Herbarium, Howrah (CAL) and DD and were examined by me personally to compare our specimen.\u00a0 <\/span><\/div>\n
Arenaria<\/i> s.l. has been splitted to may genera recently. We now have Arenaria<\/i> s.str., Odontostemma<\/i>, Shivparvatia<\/i> (=Solitaria<\/i>) and Eremogone<\/i>.<\/p>\n
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Thanks for your response which raises a number of really important issue as to the identification of plants in general as well as specifically in connection with this taxon.<\/div>\n
I shall respond and comment both about the general issues and about A.thangoensis<\/i> but this must wait a bit as I am rather busy at present with another lecture to prepare for early next week and have an awful lot still to complete to finalise the March 2017 Journal of the Himalayan Plant Association – of which I am both Editor and major contributor!<\/div>\n
Some of my comments will need to be worded with care…..\u00a0<\/div>\n
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References:<\/span><\/p>\n

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<\/font>The Plant List Ver.1.1<\/a>
\n\u00a0<\/span>IPNI<\/a>\u00a0\u00a0<\/span>BSI Flora of India<\/a>\u00a0\u00a0<\/span>India Biodiversity Portal<\/a> \u00a0<\/span>IBIS Flora<\/a>\u00a0 1997 IUCN Red List of Threatened Plants<\/a> By Kerry Scott Walter, Harriet J. Gillett, World Conservation Monitoring Centre<\/span><\/span><\/span><\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

Arenaria thangoensis W.W.Sm., Rec. Bot. Surv. India 4: 180 1911. ; \u00a0 Arenaria thangoensis (Caryophyllaceae) rediscovered: June 2016_DSR_1\/1 : 8 posts by 7 authors. Attachments (3) World environment day is appropriate time to inform our eFI family that in last year\u2019s botanical exploration we managed to rediscover a threatened endemic…<\/p>\n","protected":false},"author":3,"comment_status":"open","ping_status":"closed","template":"","format":"standard","meta":{"footnotes":""},"ht-kb-category":[5383],"ht-kb-tag":[],"class_list":["post-1400760","ht_kb","type-ht_kb","status-publish","format-standard","hentry","ht_kb_category-arenaria"],"_links":{"self":[{"href":"https:\/\/efloraofindia.com\/wp-json\/wp\/v2\/ht-kb\/1400760","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/efloraofindia.com\/wp-json\/wp\/v2\/ht-kb"}],"about":[{"href":"https:\/\/efloraofindia.com\/wp-json\/wp\/v2\/types\/ht_kb"}],"author":[{"embeddable":true,"href":"https:\/\/efloraofindia.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/efloraofindia.com\/wp-json\/wp\/v2\/comments?post=1400760"}],"version-history":[{"count":0,"href":"https:\/\/efloraofindia.com\/wp-json\/wp\/v2\/ht-kb\/1400760\/revisions"}],"wp:attachment":[{"href":"https:\/\/efloraofindia.com\/wp-json\/wp\/v2\/media?parent=1400760"}],"wp:term":[{"taxonomy":"ht_kb_category","embeddable":true,"href":"https:\/\/efloraofindia.com\/wp-json\/wp\/v2\/ht-kb-category?post=1400760"},{"taxonomy":"ht_kb_tag","embeddable":true,"href":"https:\/\/efloraofindia.com\/wp-json\/wp\/v2\/ht-kb-tag?post=1400760"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}