{{Short description|Species of flowering plant}} {{Use New Zealand English|date=July 2023}} {{Use dmy dates|date=July 2023}} {{Speciesbox | image = Myosotis forsteri 15096881.jpg | image_caption = flowering branch of Myosotis forsteri | status = NT | status_system = NZTCS | status_ref = <ref name="NZTCS"/> | genus = Myosotis | species = forsteri | authority = [[Johann Georg Christian Lehmann|Lehm.]]<ref name = ":JGCL" /> | synonyms ={{species list |Myosotis hamiltonii |Colenso |Myosotis polyantha |Colenso |Myosotis tenuifolia |Colenso}} | synonyms_ref =<ref name=POWO/> }}
'''''Myosotis forsteri''''' is a species of [[flowering plant]] in the [[Family (taxonomy)|family]] ''[[Boraginaceae]]''.<ref name=POWO>{{cite web |url= https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:119018-1 |title= Myosotis forsteri Lehm. |author=<!--Not stated--> |date=n.d. |website=Plants of the World Online |publisher=The Trustees of the Royal Botanic Gardens, Kew |access-date=June 14, 2025}}</ref><ref name=COL>{{cite web |url= https://www.catalogueoflife.org/data/taxon/455W7 |title= Myosotis forsteri Lehm. |author=<!--Not stated--> |date=n.d. |website=Catalogue of Life |publisher=Species 2000 |access-date=June 14, 2025}}</ref> [[Endemism|endemic]] to [[New Zealand]]. [[Johann Georg Christian Lehmann]] described the species in 1818. Plants of this species of [[Forget-me-nots|forget-me-not]] are [[Perennial plant|perennial]] rosettes with ebracteate inflorescences and white corollas with stamens that are fully included or sometimes partly exserted with the tips only surpassing the scales.
== Taxonomy and etymology == ''Myosotis forsteri'' Lehm. is in the plant family [[Boraginaceae]].<ref name=":3">{{Cite web |title=Myosotis forsteri |url=https://www.nzpcn.org.nz/flora/species/myosotis-forsteri/ |access-date=2023-08-03 |website=New Zealand Plant Conservation Network |language=en}}</ref> The species was originally described in 1818 by [[Johann Georg Christian Lehmann]].<ref name=":2">{{Cite web |last=Moore |first=L.B. |title=Boraginaceae. In 'Flora of New Zealand'. (Ed. HH Allan) Vol. 1, pp. 806–833 |url=https://floraseries.landcareresearch.co.nz/pages/Taxon.aspx?id=_2dd90ab4-331f-4d49-bb31-b0a843e65931&fileName=Flora%201.xml |access-date=2022-04-27 |website=(Government Printer: Wellington, New Zealand) floraseries.landcareresearch.co.nz}}</ref><ref name=":3" /><ref name=":JGCL">{{Cite book |last=Lehmann |first=Johannes Georgius Christianus |url=http://archive.org/details/bub_gb_5MMaAAAAYAAJ |title=Plantae e familia Asperifoliarum nuciferae |publisher=Berolini : [publisher not identified] |others=Harvard University |year=1818 |pages=95 |language=Latin}}</ref> The most recent treatment of this species was done by [[Lucy Moore (botanist)|Lucy B. Moore]] in the ''Flora of New Zealand.<ref name=":2" />''
The original description lists "[[New Holland (Australia)|Nova Hollandia]]" [Australia] as the type locality however this is an error as ''M. forsteri'' is not found in Australia (and the collectors [[Johann Forster]] and [[Georg Forster]] did not collect plants there on the [[second voyage of James Cook]]); the correct type locality is [[Dusky Sound]], [[Fiordland]], New Zealand.<ref name=":5">{{Cite journal |last=Lehnebach |first=Carlos A. |date=2012-01-01 |title=Lectotypification of three species of forget-me-nots (Myosotis: Boraginaceae) from Australasia |url=https://www.wikidata.org/wiki/Q106839608 |journal=Tuhinga: Records of the Museum of New Zealand Te Papa Tongarewa |volume=23 |pages=17–28}}</ref>''<ref name=":2" />'' The [[lectotype]] was designated by [[Carlos Lehnebach|Carlos Lehenbach]] and is lodged at the herbarium MEL at the herbarium of the [[National Herbarium of Victoria]] (MEL 71187).<ref>{{Cite web |title=Lectotype of Myosotis forsteri on JSTOR |url=https://plants.jstor.org/stable/10.5555/al.ap.specimen.mel71187 |access-date=2023-08-03 |website=plants.jstor.org |doi=}}</ref><ref name=":5" />
''Myosotis forsteri'' is morphologically most similar to [[Myosotis venosa|''Myosotis venos''a]] in its habit and leaves.''<ref name=":2" />'' The two species can be distinguished based on anther exsertion: in ''M. forsteri'' the anthers are usually included inside the corolla tube, whereas in ''M. venosa'' the anthers are fully exserted.''<ref name=":2" />''
== Phylogeny == The five individuals of ''M. forsteri'' were shown to be included in the southern hemisphere lineage of ''Myosotis'' in [[Phylogenetics|phylogenetic]] analyses of standard DNA sequencing markers ([[Ribosomal DNA|nuclear ribosomal DNA]] and [[chloroplast DNA]] regions) of New Zealand ''Myosotis''.<ref name=":1">{{Cite journal |last=Meudt |first=Heidi |last2=Prebble |first2=Jessica |last3=Lehnebach |first3=Carlos A. |date=2014-11-07 |title=Native New Zealand forget-me-nots (Myosotis, Boraginaceae) comprise a Pleistocene species radiation with very low genetic divergence |url=https://www.wikidata.org/wiki/Q54789770 |journal=Plant Systematics and Evolution |language=English |volume=301 |issue=5 |pages=1455–1471 |doi=10.1007/S00606-014-1166-X|url-access=subscription }}</ref> Within the southern hemisphere lineage, species relationships were not well resolved.<ref name=":0">{{Cite Q|Q30707919}}</ref><ref name=":1" />
Nevertheless, all of the sampled individuals clustered together (and near ''M. venosa'') in the nuclear ribosomal DNA network, and they clustered with samples of other North Island and northern South Island species in the chloroplast DNA network.<ref name=":1" />
== Description == '''''Myosotis forsteri''''' plants are rosettes. The rosette leaves have long, narrow [[Petiole (botany)|petioles]] that are about as long the leaf blades and easily distinguished from the leaf blades. The rosette leaves blades 15–40 mm long by 10–30 mm wide, broadly Both surfaces of the leaf are uniformly but sparsely covered in appressed straight antrorse (forward-facing) hairs. Each rosette has few to many ascending to erect, sometimes branched ebracteate [[inflorescence]]s that are up to 300 mm long. The cauline leaves are similar to the rosette leaves, but are smaller, become smaller and sessile toward the top of the inflorescence, and are broadly ovate. The flowers are many per inflorescence, and each is borne on a short [[Pedicel (botany)|pedicel]], without a bract. The calyx is 2.5–5 mm long at flowering and fruiting, lobed to one-half of its length or less, and with hairs mostly on the margins and ribs, some of which are hooked. The corolla is white, with a cylindrical tube, and small scales alternating with the petals. The anthers are included or partially exserted, with the tips only of the anthers surpassing the scales. The nutlets are c. 1.2 mm long.<ref name=":2" /><ref name=":3" />
The [[pollen]] of ''Myosotis forsteri'' is of the ''M. uniflora-''type.<ref>{{Cite web |title=Myosotis forsteri pollen {{!}} Collections Online - Museum of New Zealand Te Papa Tongarewa |url=https://collections.tepapa.govt.nz/topic/11017 |access-date=2023-08-03 |website=collections.tepapa.govt.nz}}</ref><ref>{{Cite journal |last=Meudt |first=Heidi |date=2016-09-27 |title=Pollen morphology and its taxonomic utility in the Southern Hemisphere bracteate-prostrate forget-me-nots (Myosotis, Boraginaceae) |url=https://www.wikidata.org/wiki/Q113676623 |journal=New Zealand Journal of Botany |language=English |volume=54 |issue=4 |pages=475–497 |doi=10.1080/0028825X.2016.1229343|url-access=subscription }}</ref>
The [[chromosome number]] of ''M. forsteri'' is unknown.
Flowering October–April; fruiting November–May.<ref name=":3" /><ref name=":2" />
As to its breeding system, ''Myosotis forsteri'' is a self-compatible, apomictic or autonomously selfing plant.<ref>{{Cite journal |last=Robertson |first=Alastair William |last2=Lloyd |first2=David G. |date=1991-01-01 |title=Herkogamy, dichogamy and self-pollination in six species of Myosotis (Boraginaceae) |journal=Evolutionary Trends in Plants |url=https://www.wikidata.org/wiki/Q119841280 |language=English |volume=5 |issue=1 |pages=53–63}}</ref><ref>{{Cite journal |last=Newstrom |first=Linda |last2=Robertson |first2=Alastair William |date=2005-01-01 |title=Progress in understanding pollination systems in New Zealand |url=https://www.wikidata.org/wiki/Q63739471 |journal=New Zealand Journal of Botany |volume=43 |issue=1 |pages=1–59 |doi=10.1080/0028825X.2005.9512943|url-access=subscription }}</ref><ref>{{Cite web |title=Breeding systems and rarity in New Zealand Myosotis |url=https://www.wikidata.org/wiki/Q112856523 |access-date=2023-08-03 |website=www.wikidata.org |language=en}}</ref>
== Distribution and habitat == ''Myosotis'' ''forsteri'' is a [[forget-me-not]] that is found in forest habitats, often near streams, seepages, or other damp, shaded places throughout the North Island and South Island of New Zealand.<ref name=":2" /><ref name=":3" />
== Conservation status == ''Myosotis forsteri'' is listed as Not Threatened on the most recent assessment (2017–2018) under the [[New Zealand Threat Classification System|New Zealand Threatened Classification]] system for plants.<ref name="NZTCS">{{Cite journal |last1=Lange |first1=Peter J. de |last2=Rolfe |first2=Jeremy R. |last3=Barkla |first3=John W. |last4=Courtney |first4=Shannel P. |last5=Champion |first5=Paul D. |last6=Perrie |first6=Leon R. |last7=Beadel |first7=Sarah M. |last8=Ford |first8=Kerry A. |last9=Breitwieser |first9=Ilse |last10=Schönberger |first10=Ines |last11=Hindmarsh-Walls |first11=Rowan |date=May 2018 |title=Conservation status of New Zealand indigenous vascular plants, 2017 |url=https://www.doc.govt.nz/globalassets/documents/science-and-technical/nztcs22entire.pdf |journal=New Zealand Threat Classification Series |volume=22 |pages=45 |oclc=1041649797}}</ref>
== Gallery == <gallery mode="packed" heights="170px"> File:SP108841^A Myosotis forsteri Lehm. WELT Te Papa 1863603 589573.jpg|Close up of rosette leaves File:SP090028 Myosotis forsteri Lehm. WELT Te Papa 1207331 506073.jpg|Habit File:SP100475 Myosotis forsteri Lehm. WELT Te Papa 1365142 590613.jpg|Pollen File:SP111288 Myosotis forsteri Lehm. WELT Te Papa 1952940 643374.jpg|Habit File:SP111288 Myosotis forsteri Lehm. WELT Te Papa 1952940 643403.jpg|Flower detail </gallery>
== References == {{Reflist}}
== External links == {{Commons}}
* [https://avh.ala.org.au/occurrences/search?taxa=myosotis+forsteri#tab_mapView ''Myosotis forsteri'' occurrence data from Australasian Virtual Herbarium]
{{Taxonbar|from=Q17416559}}
[[Category:Myosotis|forsteri]] [[Category:Endemic flora of New Zealand]] [[Category:Taxa named by Johann Georg Christian Lehmann]] [[Category:Plants described in 1818]]