A taxonomic re-evaluation of Pittosporum roimata Gemmill & S.N. Carter (Pittosporaceae, Apiales) DOI Creative Commons
C.J. James, P. J. de Lange

Ukrainian Botanical Journal, Год журнала: 2024, Номер 81(5), С. 307 - 321

Опубликована: Окт. 29, 2024

Pittosporum roimata Gemmill & S.N. Carter (Pittosporaceae, Apiales) was established in 2018 as an endemic species confined to the Poor Knights Islands group, off eastern coastline of Northland Aotearoa / New Zealand. The new distinguished from P. cornifolium A. Cunn. on basis vegetative characters (leaf length, width, petiole length), floral (pedicel flower colour), and numbers fruit per stem. also reported differing by a single substitution within nrITS cistron, with that data obtained paper did not provide phylogenetic interpretation this result, nor specify whether cultivated plants used were derived seed multiple individuals or cutting grown limited wild-sourced selection. In same morphological separate are examined using much wider sampling cornifolium, specimens available for roimata. There very slight differences leaf width pedicel length seen some collections other northern Zealand offshore islands mainland stations. Flower colour is useful character variable it many Pittosporum. On our assessment we conclude maintain segregation at rank impractical, there grading between both species. As corresponding occur throughout range already species, suggest that, line treatments Pittosporum, better reduce into synonymy cornifolium.

Язык: Английский

Ancestral state reconstruction sheds new light on the loss of divarication hypothesis on New Zealand's outlying islands DOI
Riccardo Ciarle, P. J. de Lange, Kevin C. Burns

и другие.

Journal of Ecology, Год журнала: 2025, Номер unknown

Опубликована: Апрель 2, 2025

Abstract The New Zealand flora is remarkable in many respects, but one of its most notable features the convergent evolution plant lineages towards a divaricate habit. adaptive significance divarication remains controversial, it has usually been considered response to harsh climates or defence mechanism against diverse array Ratites (large browsing birds) that once populated Zealand. loss hypothesis posits divaricate‐related traits should be lost on Zealand's outlying islands, as these islands were never reached by Ratites. Like evolutionary components island syndrome, this was tested through pairwise comparison method, is, comparing endemics those their closest relative(s) mainland, assuming recent common ancestor (MRCA) divaricate. This assumption challenged results tested. Here, we test assumption. We collated data for all genus comprising at least species and endemic region. used ancestral range reconstruction determine which colonised from then state whether each MRCA quantify degree morphological leaf size branching angle (i.e. significant traits) islands. Twenty‐one out 29 MRCAs estimated likely non‐divaricate, meaning cases evolved mainland present Island also larger leaves smaller angles regardless not. Synthesis . These findings show how advance our understanding In addition, they have broader implications field biogeography, highlight limits method provide way overcome them.

Язык: Английский

Процитировано

0
Does flower size follow the ‘island rule’? A commentary on ‘Flower size evolution in the Southwest Pacific’ DOI
Marcos Méndez

Annals of Botany, Год журнала: 2025, Номер unknown

Опубликована: Май 1, 2025

Язык: Английский

Процитировано

0
A taxonomic re-evaluation of Pittosporum roimata Gemmill & S.N. Carter (Pittosporaceae, Apiales) DOI Creative Commons
C.J. James, P. J. de Lange

Ukrainian Botanical Journal, Год журнала: 2024, Номер 81(5), С. 307 - 321

Опубликована: Окт. 29, 2024

Pittosporum roimata Gemmill & S.N. Carter (Pittosporaceae, Apiales) was established in 2018 as an endemic species confined to the Poor Knights Islands group, off eastern coastline of Northland Aotearoa / New Zealand. The new distinguished from P. cornifolium A. Cunn. on basis vegetative characters (leaf length, width, petiole length), floral (pedicel flower colour), and numbers fruit per stem. also reported differing by a single substitution within nrITS cistron, with that data obtained paper did not provide phylogenetic interpretation this result, nor specify whether cultivated plants used were derived seed multiple individuals or cutting grown limited wild-sourced selection. In same morphological separate are examined using much wider sampling cornifolium, specimens available for roimata. There very slight differences leaf width pedicel length seen some collections other northern Zealand offshore islands mainland stations. Flower colour is useful character variable it many Pittosporum. On our assessment we conclude maintain segregation at rank impractical, there grading between both species. As corresponding occur throughout range already species, suggest that, line treatments Pittosporum, better reduce into synonymy cornifolium.

Язык: Английский

Процитировано

0