Question: What is a genus of flowering plants in the family Boraginaceae, Emilia or Eritrichium ?
Context: Boraginoideae is a subfamily of the flowering plant family Boraginaceae, as that family is defined in the APG III system of classification for flowering plants.  The Angiosperm Phylogeny Group has not actually specified subfamilies within Boraginaceae.  Some taxonomists place the genera "Codon" and "Wellstedia" in Boraginoideae.  Others place one or both of these in separate, monogeneric subfamilies.  "Codon" was long regarded as an odd member of Hydrophylloideae, but in 1998, a molecular phylogenetic study showed that it is closer to Boraginoideae. Amsinckia is a genus of flowering plants commonly known as fiddlenecks.  The common name is derived from the flower stems, bearing many small flowers, which curl over at the top in a manner reminiscent of the head of a fiddle.  Fiddlenecks are in the family Boraginaceae, along with borage and forget-me-nots.  The genus is named after the patrician Amsinck family in honour of the Hamburg head of state and patron of botany Wilhelm Amsinck (1752–1831). Pteleocarpa is a genus of flowering plants.  The only member of the genus is the western Malesian tree Pteleocarpa lamponga.  It has had a varied systematic history and has been placed in the families Icacinaceae, Cardiopteridaceae, Boraginaceae, and others.  It has long been regarded as enigmatic.  For example, its winged fruit is quite odd within the family Boraginaceae, where it was usually placed in the 2000s.  The family name Pteleocarpaceae had been used, but was not validly published until 2011, when the required description was published in Kew Bulletin.  A morphological study of "Pteleocarpa" was published in 2014.  Also in 2014, a molecular phylogenetic study of the lamiids (a.k.a. Garryidae) sampled "Pteleocarpa" and resolved it as sister to Gelsemiaceae.  Both genera of Gelsemiaceae ("Gelsemium" and "Mostuea") were sampled and this result had maximum statistical support in three different methods of cladistic analysis.  The authors of that study recommended that "Pteleocarpa" be included in Gelsemiaceae.  This was formally done in 2014 by altering the description of the family to accommodate it.  In the APG IV system published in 2016, "Pteleocarpa" is included in Gelsemiaceae. Hydrophylloideae is a subfamily of the Boraginaceae family of flowering plants.  Their taxonomic position is somewhat uncertain.  Traditionally, and under the Cronquist system, they were given family rank under the name Hydrophyllaceae, and treated as part of the order Solanales.  More recent systems have recognised their close relationship to the borage family, Boraginaceae, initially by placing Hydrophyllaceae and Boraginaceae together in an order Boraginales, and most recently by demoting Hydrophyllaceae to a subfamily of Boraginaceae.  However the placement and circumscription of Boraginaceae is still uncertain: it is unplaced at order level, and there is some prospect of it being split up again in future. Selkirkia is a genus of flowering plants in the family Boraginaceae.  Three species occur on the South American mainland and one, "Selkirkia berteroi" (sometimes written "berteri"), the first of the genus to be reported, is an endemic on Robinson Crusoe Island off the coast of Chile.  It was previously considered a monotypic genus. Emilia is a genus of herbaceous plants in the family sunflower family, known as tasselflower or pualele. Eritrichium (alpine forget-me-not) is a genus of flowering plants in the family Boraginaceae.  It contains 71 species.  Notable members include "Eritrichium howardii" and "Eritrichium nanum". Mertensia is a genus of flowering plants in the family Boraginaceae.  They are perennial herbaceous plants with blue or sometimes white flowers that open from pink-tinged buds.  Such a change in flower color is common in Boraginaceae and is caused by an increase of pH in the flower tissue.  "Mertensia" is one of several plants that are commonly called "bluebell".  In spite of their common name, the flowers are usually salverform (trumpet-shaped) rather than campanulate (bell-shaped). Onosma is a genus of flowering plants in the family Boraginaceae.  They are native to the Mediterranean and western Asia.  They grow in dry, sunny habitats with rocky, sandy substrates.  Some are popular as rock garden plants. Myosotis ( ; from the Greek: μυοσωτίς "mouse's ear", after the leaf) is a genus of flowering plants in the family Boraginaceae.  In the northern hemisphere they are commonly called forget-me-nots or scorpion grasses.  The common name "forget-me-not" was calqued from the German "Vergissmeinnicht ", and first used in English in 1398 AD via King Henry IV.  Similar names and variations are found in many languages. " Myosotis alpestris" is the state flower of Alaska and Dalsland Sweden.  Plants of this genus are commonly confused with Chatham Islands forget-me-nots which belong to a related genus, "Myosotidium".
Answer: Eritrichium