Alyxia dolioliflora Guillaumin 1958
Creators: name: Lannuzel, Guillaume
name: Munzinger, Jérôme
name: Vandrot, Hervé
name: Gâteblé, Gildas
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Gentianales
Apocynaceae
Alyxia
Alyxia dolioliflora

description: Alyxia dolioliflora Guillaumin (1958: 398).
Holotype:— NEW CALEDONIA, Two miles south of Pouembout, elev. 200 m, 16 July 1952, MacMillan 5108: P [P00072136!]; isotypes: A [A02180217!], BISH [BISH500605], E [E00086582], K [K000894167!], L [L0004670!] (Figs 3, 5)
Species circumscription: — Alyxia dolioliflora was considered as a distinct species by Boiteau (1981), and then included in A. tisserantii by Middleton (2002). We follow Boiteau (1981) and keep it as a distinct species characterized by linear leaves, red bark, and fruit articles longer than they are wide. Some specimens (e.g. MacKee 16935, Munzinger 7856) of A. tisserantii s.l. (as circumscribed here) can be confused with A. dolioliflora. However A. dolioliflora differs from A. tisserantii by a longer corolla tube (2.5–4.1mm vs 1.1–2.1 mm), and longer fruit articles (8–9.5 mm vs ca. 4.2–5.1 mm). Alyxia dolioliflora is most similar to A. minimiflora and A. rosmarinifolia, but differs from both by a longer corolla tube (2.5–4.1 mm vs 0.8–1.6 mm), and from the former by being entirely glabrous. As circumscribed here, the species grows only on serpentinites, at the low altitude foot of ultramafic mountains in the central part of the western coast of Grande Terre. In this region, it is easily recognizable as it forms typical shrubs with erect linear leaves. One must however be careful, as it can be confused with some forms of A. tisserantii, at the margins of its distribution. A closer look at the fertile parts then becomes conclusive.
Distribution and habitat:— A. dolioliflora is distributed from Poya to Kaala-Gomen, at low altitude (0–300 m elev.) on ultramafic substrates. It grows mainly in shrublands.
Phenology:— From herbarium specimens and pictures available, A. dolioliflora is flowering and fruiting from October to July, and seems to be sterile in August and September.
Specimens examined:— NEW CALEDONIA; North province: Presqu'île de Gatope, 20°58'47"S, 164°39'50"E, 23 October 2012, Butin 266 bis (NOU081790!); Pouembout, Tiaoué, elev. 50 m, 26 February 2004, Dagostini, Rigault & Fambart-Tinel 835 (NOU003016!, P04551201!); s.l., 1874, Germain s.n. (P04225736!); Mt Koniambo, 21 December 1950, Guillaumin 9512b (P04225738!); Kaféaté, 27 December 1950, Guillaumin 9630 (L.3729894!, P04225726!); Oundjo, 15 January 1974, Jaffré 1214 (L.2702461!, NOU058240!, P04225717!, P05236784!); Tinip, elev. 50 m, 20 May 1956, MacKee 4627 (E00098761, L.2711052!, P04237019!); Voh: Mt. Katépahié, elev. 400 m, 20 January 1963, MacKee 10071 (CANB 146007.1!, L.2702420!, NOU058232!, P04225709!); Oundjo, elev. 50 m, 8 May 1966, MacKee 14905 (L.2699544!, NOU058233!, P04225749!); Voh: base du Mt. Katépahié, elev. 30 m, 12 October 1965, MacKee 13607 (L.2702434!, P04225754!); Tinip, 5 July 1966, MacKee 15191 (L.2711050!, MO1114518, NOU058037!, P04237018!); Pouembout: Base W Plateau Tiéa, elev. 30 m, 22 May 1967, MacKee 16813 (L.2702419!, MO1114516!, NOU058302!, NOU058303!, P04225816!); Mt Kopéto (Pente Nord), elev. 400–800 m, 6 July 1967, MacKee 17097 (L.2699557!); Oundjo, 26 January 1970, MacKee (Leg. Déméné) 21482 (NOU058031!, P04225597!, P04237011!); Kone: Pinjen, elev. 50 m, 25 April, 1971, MacKee 23568 (L.2711049!); Pouembout, elev. 30 m, 16 February 1972, MacKee 25018 (L.2699514!, NOU058304!, P04225595!); Pouembout, elev. 30 m, 16 February 1972, MacKee 25019 (NOU058305!, P04225594!); Oundjo, elev. 0–50 m, 17 February 1972, MacKee 25040 (L.2699543!, P04225596!); Mt Koniambo, elev. 100m, 24 April 1974, MacKee 28530 (L.2699538!, P04225587!, P05236797!); Tiéa (Pente Ouest), elev. 50 m, 27 December 1974, MacKee 29554 (L.2702431!, MO1114514, P04225583!); Pouembout: Base W Tiéa, elev. 50 m, 11 April 1975, MacKee 30028 (L.2702418!, NOU058306!, P04225550!); Voh: Katepahie, elev. 50 m, 1 January 1976, MacKee 30566 (L.2699519!, L.2699520!, MO1114578, P04260832!), Poya: Avangui, elev. 300 m, 2 January 1976, MacKee 30617 (L.2699563!, NOU058171!, P04225546!); Voh: Tieta, elev. 50 m, 20 May 1977, MacKee 33175 (L.2711048!, NOU058028!, P04237010!); Tinip, elev. 150 m, 22 January 1979, MacKee 36482 (BISH745438!, L.2702462!, NOU058307!, P04225534!, P04225538!, P04551288!); Voh: Tahafé, elev. 200 m, 12 April 1979, MacKee 36765 (BISH745436, L.2702441!, NOU058308!, P04551240!, P04225535!, P04551241!); Cap Deverd, South of Kaala-Gomen, elev. 30 m, 22 December 1983, McPherson 6208 (MO420962!, NOU058181!, P04236830!); Base du Koniambo, 16 December 1973, Jaffré 1267 (NOU058239!, P04236776!); Vavouto, elev. 45 m, 18 December 2002, Jaffré & Roumagnac 3583 (NOU058226!, P04551199!); Tiéa, S of Pouembout, elev. 90 m, 18 November 2015, Lowry 7411 (MO100880167, MPU312388!, NOU082432!); 2 miles south of Pouembout, elev. 200 m, 1952, McMillan 5108 (BISH500605, E00086582!, K000894167!, L 0004670!, P00072136!); Mt, Koniambo, elev. 150 m, 7 January 1983, McPherson 5323 (MO421093, NOU058313!); Oundjo, 15 September 1966, Schmid 1442 (NOU058238!, NOU058295!, P04225564!, P04225565!, P05236779!); Oundjo, 15 September 1966, Schmid 1442 bis (NOU058294!); Koniambo Ouest, elev. 50 m, 19 December 1972, Schmid 4341 (NOU058296!), Koné, cimetière Oundjos, 25 November 1967, Sévenet 345 (P04551311!); Koniambo, elev. 100 m, 12 February 1974, Sévenet 589 (NOU058297!); Ouaco-Tinip, 4 November 1975, Sévenet & Boiteau 1100 (NOU058231!, P04226203!); Near Oundjo, 10 November 1959, Thorne 28017 (P04225559!); 7 km S of Pouembout, 20 October 1959, Thorne 28025 (P04225560!); Pouembout Goyeta, 26 May 1982, Toutain 3486 (NOU058310!); Gatope, 1861, Vieillard 2766 (P04220361!, P04225811!); Gatope, 1861, Vieillard 2970 (P04220355!); Pum, Tanlé, Vieillard 951 (K000894170!, L 0064516!, L 0004669!, NY345468!, NY345469!, P00156869!, P00156870!, P00156871!, P00156872!, P00156873!, P00156874!, P00156875!); Gatope, Vieillard 952 (BM000508454!, K000894169!, P00156867!, P00156868!).
description: Published as part of Lannuzel, Guillaume, Munzinger, Jérôme, Vandrot, Hervé & Gâteblé, Gildas, 2024, Alyxia Banks ex R. Br. in New Caledonia: a clarification of several species complexes, nomenclatural notes, and a description of three new species, pp. 1-43 in Phytotaxa 649 (1) on page 10, DOI: 10.11646/phytotaxa.649.1.1, http://zenodo.org/record/13215783