Question: Both Buddleja and Acantholimon are considered which level of classification?
Context: Buddleja davidii 'Pink Pearl' is an old European cultivar.  'Pink Pearl' is considered aesthetically inferior to other, more recent, pink varieties, and was unplaced in the public popularity poll held as part of the Buddleja trials organized by the Royal Horticultural Society at Wisley. The European Union uses a classification for subnational territory called "Nomenclature des Unites Territriales Statistques" (commonly abbreviated as NUTS).  The NUTS 1 classification is applied to a group of regions, NUTS 2 for regions and NUTS 3 as subdivisions of regions.  There are also two levels (NUTS 4 and 5) which relate to local administrative unit levels.  Countries agree a NUTS classification with the European Commission.  Geddes notes that NUTS level 2 is "particularly important", because they often exist as territorial-government divisions and are used for regional policies by countries.  NUTS 1 typically has a population of 3-7 million; NUTS 2 0.8-3 million; and NUTS 3 150,000-800,000.  As of 2015, there are 98 regions at NUTS 1 level, 276 regions at NUTS 2 level and 1,342 regions at NUTS 3 level "(as a result, statistics at the NUTS level 3 are found as an external link to this article)".  The EU is based on the classification of NUTS 2 regions as: less developed regions, transition regions and more developed regions. Para-archery classification is the classification system for para-archery used to create a level playing field for archers with a different range of disabilities.  Governance in the sport is through the International Archery Federation.  Early classification systems for the sport were created during the 1940s and based on medical classification.  This has subsequently changed to a functional mobility classification with the exception of blind archery. A library classification is a system by which library resources are arranged according to subject.  Library classifications use a notational system that represents the order of topics in the classification and allows items to be stored in that order.  Library classification systems group related materials together, typically arranged in a hierarchical tree structure.  A different kind of classification system, called a faceted classification system, is also widely used which allows the assignment of multiple classifications to an object, enabling the classifications to be ordered in multiple ways.  The library classification numbers can be considered identifiers for resources but are distinct from the International Standard Book Number (ISBN) or International Standard Serial Number (ISSN) system. Wachau is one of Austria's most established and notable wine regions, specializing in dry wines made from Riesling and Grüner Veltliner.  Located in Lower Austria along the Danube, west of Vienna and Krems an der Donau, it is one of the westernmost wine producing regions in Austria with only a few scattered plantings in Tyrol being further west.  While most of Austria follows a wine classification systems based on ripeness and harvest must weight that parallels the German wine classification system, Wachau wines have a unique classification system.  The three classification levels for Wachau wine include "Steinfeder" for wines up to 11.5% alcohol level, "Federspiel" for wines between 11.5–12.5% and "Smaragd" that must have a minimum of 12.5% alcohol level.  Despite its renown, the Wachau is a small wine region that usually accounts for only around 3% of Austria's wine production. Buddleja americana is the most widespread of all the "Buddleja" species native to the Americas, its range extending south from Tamaulipas, Mexico, through Central America and much of the West Indies into South America, reaching eastward to Venezuela, westward as far as the Galapagos, and south to Bolivia.  It occurs at elevations from sea level to 2500 m, in a variety of habitats, including cloud forest, mountain savanna, pine - oak forest, and rocky slopes near rivers.  It also invades fields and roadsides. Buddleja globosa, also known as the orange-ball-tree or orange ball buddleja, is a species of flowering plant endemic to Chile and Argentina, where it grows in dry and moist forest, from sea level to 2,000 m.  The species was first described and named by Hope in 1782 Buddleja, or Buddleia (also historically given as "Buddlea"), commonly known as the butterfly bush, is a genus comprising over 140 species of flowering plants endemic to Asia, Africa, and the Americas.  The generic name bestowed by Linnaeus posthumously honoured the Reverend Adam Buddle (1662–1715), an English botanist and rector, at the suggestion of Dr. William Houstoun.  Houstoun sent the first plants to become known to science as buddleja ("B. americana") to England from the Caribbean about 15 years after Buddle's death. Buddleja 'Summer Rose' is an American hybrid cultivar raised by the Bernheim Arboretum, Clermont, Kentucky.  and considered one of the five best buddleja cultivars available in the USA by Dirr. Acantholimon (prickly thrift) is a genus of small flowering plants within the plumbago or leadwort family, Plumbaginaceae.  They are distributed from southeastern Europe to central Asia and also in South America, but also cultivated elsewhere in rock gardens.
Answer: genus