''Johnstonella'' is a genus of flowering plants belonging to the family Boraginaceae. Its native range is south western and southern USA to Mexico, Peru to southern South America. It is found in the American states of Arizona, California, Nevada, New Mexico, Texas and Utah, as well as in the countries of Argentina, Chile, Mexico and Peru.

Taxonomy

The genus name of ''Johnstonella'' is in honour of Ivan Murray Johnston (1898–1960), an American botanist. It was first described and published by

August Brand August Brand (19 August 1863 – 17 September 1930) was a German philologist and botanist. Brand was born in Berlin. He studied classical philology at Bonn and Berlin, obtaining his doctorate in 1885 with the thesis "De dialectis Aeolicis quae ...

in Repert. Spec. Nov. Regni Veg. Vol.21 on page 249 in 1925. Then in 1927, Ivan M. Johnston wrote that the genus of '' Oreocarya'' (in the Boraginaceae family) could be combined with '' Cryptantha''. Then Edwin Blake Payson in 1927 (A Monograph of the section ''Oreocarya'' of ''Cryptantha'', Ann. Mo. Bot. Gard. 14:211-358) agreed with Johnston and Payson had four sections in ''Cryptantha'': ''Eucryptantha'' (= ''Cryptantha''), ''Geocarya'', ''Krynitzkia'' (inclusive of '' Eremocarya'', '' Greeneocharis'', and ''Johnstonella''), and ''Oreocarya''. Larry Higgins (1971), another expert on the perennial taxa, published a revised monograph of ''Oreocarya'', and agreed with Johnston and Payson on the inclusion of ''Oreocarya'' within ''Cryptantha'', but also elevating the four sections of Johnston (1927) and Payson (1927) to

subgenera In biology, a subgenus (plural: subgenera) is a taxonomic rank directly below genus. In the International Code of Zoological Nomenclature, a subgeneric name can be used independently or included in a species name, in parentheses, placed between t ...

. Although various species were sometimes still called synonyms of ''Cryptantha''. In 2012, the phylogenetic relationship of members of the genus ''Cryptantha'' was carried out, based on

dna sequencing DNA sequencing is the process of determining the nucleic acid sequence – the order of nucleotides in DNA. It includes any method or technology that is used to determine the order of the four bases: adenine, guanine, cytosine, and thymine. Th ...

analyses, it was then proposed that the resurrection of the following genera ''Eremocarya'', ''Greeneocharis'', ''Johnstonella'', and also '' Oreocarya''.

Known species

According to Kew: *''

Johnstonella albida ''Johnstonella'' is a genus of flowering plants belonging to the family Boraginaceae. Its native range is south western and southern USA to Mexico, Peru to southern South America. It is found in the American states of Arizona, California, Nevada ...

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Johnstonella angelica ''Johnstonella'' is a genus of flowering plants belonging to the family Boraginaceae. Its native range is south western and southern USA to Mexico, Peru to southern South America. It is found in the American states of Arizona, California, Nevada ...

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Johnstonella angustifolia ''Johnstonella angustifolia'' is a species of wildflower in the borage family known by several common names, including Panamint catseye and bristlelobe cryptantha. This plant is native to northern Mexico and the southwestern United States from ...

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Johnstonella costata ''Johnstonella'' is a genus of flowering plants belonging to the family Boraginaceae. Its native range is south western and southern USA to Mexico, Peru to southern South America. It is found in the American states of Arizona, California, Nevada ...

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Johnstonella diplotricha ''Johnstonella'' is a genus of flowering plants belonging to the family Boraginaceae. Its native range is south western and southern USA to Mexico, Peru to southern South America. It is found in the American states of Arizona, California, Nevada ...

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Johnstonella fastigiata ''Johnstonella'' is a genus of flowering plants belonging to the family Boraginaceae. Its native range is south western and southern USA to Mexico, Peru to southern South America. It is found in the American states of Arizona, California, Nevada ...

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Johnstonella geohintonii ''Johnstonella'' is a genus of flowering plants belonging to the family Boraginaceae. Its native range is south western and southern USA to Mexico, Peru to southern South America. It is found in the American states of Arizona, California, Nevada ...

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Johnstonella grayi ''Johnstonella'' is a genus of flowering plants belonging to the family Boraginaceae. Its native range is south western and southern USA to Mexico, Peru to southern South America. It is found in the American states of Arizona, California, Nevada ...

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Johnstonella gypsites ''Johnstonella'' is a genus of flowering plants belonging to the family Boraginaceae. Its native range is south western and southern USA to Mexico, Peru to southern South America. It is found in the American states of Arizona, California, Nevada ...

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Johnstonella holoptera ''Johnstonella'' is a genus of flowering plants belonging to the family Boraginaceae. Its native range is south western and southern USA to Mexico, Peru to southern South America. It is found in the American states of Arizona, California, Nevada ...

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Johnstonella inaequata ''Johnstonella'' is a genus of flowering plants belonging to the family Boraginaceae. Its native range is south western and southern USA to Mexico, Peru to southern South America. It is found in the American states of Arizona, California, Nevada ...

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Johnstonella mexicana ''Johnstonella'' is a genus of flowering plants belonging to the family Boraginaceae. Its native range is south western and southern USA to Mexico, Peru to southern South America. It is found in the American states of Arizona, California, Nevada ...

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Johnstonella micromeres ''Johnstonella'' is a genus of flowering plants belonging to the family Boraginaceae. Its native range is south western and southern USA to Mexico, Peru to southern South America. It is found in the American states of Arizona, California, Nevada ...

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Johnstonella parviflora ''Johnstonella'' is a genus of flowering plants belonging to the family Boraginaceae. Its native range is south western and southern USA to Mexico, Peru to southern South America. It is found in the American states of Arizona, California, Nevada ...

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Johnstonella pusilla ''Johnstonella'' is a genus of flowering plants belonging to the family Boraginaceae. Its native range is south western and southern USA to Mexico, Peru to southern South America. It is found in the American states of Arizona, California, Nevada ...

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Johnstonella racemosa ''Johnstonella'' is a genus of flowering plants belonging to the family Boraginaceae. Its native range is south western and southern USA to Mexico, Peru to southern South America. It is found in the American states of Arizona, California, Nevada ...

References

{{Taxonbar, from=Q17414461 Boraginaceae Boraginaceae genera Plants described in 1925 Flora of the Southwestern United States Flora of the South-Central United States Flora of Argentina Flora of Chile Flora of Mexico Flora of Peru