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| Adelmeria isarogensis Docot & Banag
in Docot, Banag & Poulsen, 2019.
DOI: 10.1002/tax.12071
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Abstract
In 1909, Ridley published Adelmeria characterized by its congested terminal inflorescence with large persistent floral bracts. All five species at some point placed in Adelmeria were synonymized in Alpinia by Loesener and subsequent authors. Several phylogenetic studies revealed that Alpinia is highly polyphyletic, suggesting that it should be split into several genera. In the present study, we sampled all five species initially placed in Adelmeria plus additional ones with a similar morphology. The combined analysis of the ITS and trnK/matK regions showed that these species formed a strongly supported monophyletic group inside the Alpinia eubractea clade of the tribe Alpinieae. Although not completely diagnostic, the following morphological characters separate Adelmeria from most of the species currently inside the Alpinia eubractea clade: bilobed ligules; congested inflorescences; utricular bracteoles; sessile flowers; crestless anthers; obovoid fruits. Considering this molecular and morphological evidence, the recognition of Adelmeria is highly justified. In this present paper, we reinstate the genus which is endemic to the Philippines and provide a comprehensive taxonomic revision including a discussion of the application of the name Elmeria. A key to nine species of Adelmeria, four of which (Adelmeria dicranochila, A. isarogensis, A. leonardoi, A. undulata) are new to science, is provided as well as full descriptions and preliminary conservation assessments. Interestingly, monoecy was observed in A. oblonga and reported for the first time for Adelmeria. Four lectotypes and one epitype are designated in this study.
Keywords: Alpinia, Alpinia eubractea clade, Elmeria, ITS, phylogeny, trnK/matK
Adelmeria Ridl. in Leafl. Philipp. Bot. 2: 603. 1909
≡ Elmeria
Ridl. in Leafl. Philipp. Bot. 2: 569. 1909, nom. illeg.,
non
Elmera Rydb. in N. Amer. Fl. 22(2): 97. 1905
– Type
(designated by Smith in Notes Roy. Bot. Gard. Edinburgh
34: 175. 1975): A. paradoxa (Ridl.) Merr. (≡ Hornstedtia
paradoxa Ridl.).
Adelmeria dicranochila Docot & Banag, sp. nov.
Etymology. – The specific epithet is derived from the Greek
words “dicranos” meaning forked and “cheilos” meaning lip.
Adelmeria isarogensis Docot & Banag, sp. nov.
Etymology. – The specific epithet is derived from the type locality, Mount Isarog, which is considered as the last tropical rainforest of Bicol Peninsula.
Adelmeria leonardoi Docot & Banag, sp. nov.
Etymology. – This very unique species was first noticed by the first author on the website of Co’s Digital Flora of the Philippines (see Pelser et al., 2011–) which includes photographs taken by Leonardo L. Co (1953–2010), who was one of the great botanists of the Philippines and shared a huge interest in gingers. Therefore, this species is named after him.
Adelmeria undulata Docot & Banag, sp. nov.
Etymology. – The specific epithet refers to its coarsely undulated leaf margin.
Etymology. – The specific epithet refers to its coarsely undulated leaf margin.
Adelmeria alpina Elmer in Leafl. Philipp. Bot. 8: 2885. 1915 (‘alpinum’)
≡ Alpinia alpina (Elmer) R.M.Sm.
ex M.F.Newman, Lhuillier & A.D.Poulsen in Blumea,
Suppl. 16: 7. 2004
Local names. – Pusadok and lurasising (Bisaya language).
Etymology. – The specific epithet refers to the alpine regions of Mount Apo (2954 m), the highest mountain in the Philippines, where this species was first collected.
Adelmeria gigantifolia (Elmer) Elmer in Leafl. Philipp.
Bot. 8: 2963. 1919 (‘gigantifolium’)
≡ Zingiber gigantifolium Elmer in Leafl. Philipp. Bot. 8: 2916. 1915
≡ Alpinia gigantifolia (Elmer) R.M.Sm. in Edinburgh J.
Bot. 47(1): 65. 1990
Etymology. – The specific epithet refers to the large leaves.
Adelmeria oblonga Merr. in Philipp. J. Sci. 9: 443. 1914
≡
Alpinia oblonga (Merr.) Loes. in Engler & Prantl, Nat.
Pflanzenfam., ed. 2, 15a: 620. 1930
Etymology. – The specific epithet refers to the oblong inflorescence.
Adelmeria paradoxa (Ridl.) Merr. in Philipp. J. Sci. C 9:
444. 1914
≡ Hornstedtia paradoxa Ridl. in Publ. Bur.
Sci. Gov. Lab. 35: 85. 1905
≡ Elmeria bifida Ridl. in
Leafl. Philipp. Bot. 2: 569. 1909, nom. illeg.
≡
Adelmeria bifida Ridl. in Leafl. Philipp. Bot. 2: 603.
1909, nom. illeg.
≡ Alpinia paradoxa (Ridl.) Loes. in
Engler & Prantl, Nat. Pflanzenfam., ed. 2, 15a: 620.
1930
Etymology. – The specific epithet was chosen by Ridley to reflect his confusion regarding in which genus to place his new species as he found the characters of this species contradicting.
Adelmeria pinetorum (Ridl.) Ridl. in Philipp. J. Sci. C 4:
179. 1909
Etymology. – This species was discovered in the pine regions of Baguio, hence its specific epithet “pinetorum”, meaning associated with pines.
≡ Elmeria pinetorum Ridl. in Leafl. Philipp.
Bot. 2: 570. 1909 ≡ Alpinia pinetorum (Ridl.) Loes. in
Engler & Prantl, Nat. Pflanzenfam., ed. 2, 15a: 620. 1930
Etymology. – This species was discovered in the pine regions of Baguio, hence its specific epithet “pinetorum”, meaning associated with pines.
Rudolph Valentino A. Docot, Cecilia I. Banag and Axel Dalberg Poulsen. 2019. Reinstatement and Revision of the Genus Adelmeria (Zingiberaceae) Endemic to the Philippines. TAXON. 68(3); 499-521. DOI: 10.1002/tax.12071
