Typification of the name Johnstonella (Boraginaceae)

  title={Typification of the name Johnstonella (Boraginaceae)},
  author={Michael G. Simpson and Kristen Hasenstab-Lehman and Ronald B. Kelley},
The genus Johnstonella Brand was published in 1925, as a segregate genus of Cryptantha (Boraginaceae). Brand included two species, J. racemosa and J. inaequata, in his treatment. Johnston, in the same year, indicated J. racemosa as the type of Johnstonella. However, Johnston's publication predated Brand's; therefore, Johnston's typification is not effective. Although Johnstonella has generally not been accepted by taxonomists, it has recently been resurrected based on molecular phylogenetic… 

Johnstonella punensis (Boraginaceae), a new species endemic to the dry Puna of Chile

A new species of Johnstonella, endemic to the dry Puna of Chile, which is unusual in the genus in having a non-tuberculate, dimpled to rugulose nutlet surface sculpturing and a long style that extends beyond the nutlets.

Revisión taxonómica del género Johnstonella (Boraginaceae s. str.) en la Argentina

A complete synonymy is provided for the accepted species, as well as morphological descriptions, geographical distribution maps, an identification key, uses, illustrations, photographs, and estimates of their conservation status.

Transfer of four species of Cryptantha to the genus Johnstonella (Boraginaceae)

The transfer of Cryptantha texana to Johnstonella is delayed because of its morphological similarity to other species that clearly nest within Cryptantha s.s.l, and new combinations are made in transferring four of these species from Cryptantha toJohnstonella to maintain monophyly of genera.

Evaluating the Monophyly and Biogeography of Cryptantha (Boraginaceae)

A greatly increased sampling of Cryptantha taxa is analyzed using high-throughput, genome skimming data, and the occurrence of a non-monophyletic Cryptantha is confirmed, with three major clades obtained, termed here the Johnstonella/Albidae clades, the Maritimae clade, and a large Cryptantha core clade each strongly supported as monophyletics.

Phylogeny of the popcorn flowers: Use of genome skimming to evaluate monophyly and interrelationships in subtribe Amsinckiinae (Boraginaceae)

Although genome skimming verifies the monophyly of many genera and clades of Amsinckiinae, relationships among those clades and along the backbone of the trees remain uncertain, their elucidation possibly a factor of short branch lengths and likely requiring different types of molecular data.



Cat's Eyes and Popcorn Flowers: Phylogenetic Systematics of the Genus Cryptantha s. l. (Boraginaceae)

The hypothesis of repeated, unidirectional dispersal events, from North to South America, is generally supported and the multiple, derived evolution of perenniality, reduction in nutlet number, nutlet heteromorphism, smooth nutlet sculpturing, heterostyly, and cleistogamy are supported.

Drei neue Gattungen der Cryptantheae.

Studies in the Boraginaceae. --IV. The North American species of Cryptantha

  • I. M. Johnston
  • Chemistry
    Contributions from the Gray Herbarium of Harvard University
  • 1925

2012. International Code of Nomenclature for algae, fungi, and plants (Melbourne Code): Adopted by the Eighteenth International Botanical Congress

  • 2012. International Code of Nomenclature for algae, fungi, and plants (Melbourne Code): Adopted by the Eighteenth International Botanical Congress
  • 2011

Therefore , we formally designate a type for Johnstonella here

  • Johnstonella Brand in Repert . Spec . Nov . Regni Veg .