Origanum ( )is a genus of herbaceous perennials and subshrubs in the family Lamiaceae, native to Europe, North Africa, and much of temperate Asia, where they are found in open or mountainous habitats.
 A few species also naturalized in scattered locations in North America and other regions.
Solenopsis nitens is one of more than 185 species in the genus "Solenopsis".
 It is found in Sri Lanka.
Pulsatilla vernalis (spring pasqueflower, arctic violet, lady of the snows) is a species of flowering plant in the family Ranunculaceae, native to mountainous habitats in Europe.
 Growing to 10 cm high and wide, it is a semi-evergreen perennial with hairy, divided leaves.
 In early spring it bears anemone-like flowers which are up to 6 cm in diameter, white flushed with violet on the outer surface of the petals, and prominent yellow stamens.
Origanum onites, the Cretan oregano, Turkish oregano, pot marjoram or rίgani in Greek (Ελληνική ρίγανη), is a plant species in the genus "Origanum" found in Sicily, Greece and Turkey.
 It has similar flavors as oregano.
 Its essential oil can be distinguished from other species such as Greek oregano ("Origanum vulgare ssp.
 hirtum").
 It has antimicrobial activities.
Solenopsis is a genus of plants in the Campanulaceae.
 It is native to the Mediterranean region from Portugal and the Canary Islands east to Turkey.
Torilis japonica, the erect hedgeparsley, upright hedge-parsley or Japanese hedge parsley, is a plant species in the genus "Torilis".
 Japanese Hedgeparsley is considered both an annual and biennial plant in the carrot family depending on the biogeographical location.
 This means Japanese Hedgeparsley can complete its life cycle in either one or two growing seasons depending on habitat.
 Japanese Hedgeparsley is typically found in areas with disturbed soils, pastures, margins, open woodland, near waste sites, or right-of-way habitats.
 It can withstand a variety of habitats, thriving in partial and full shaded areas, but also withstanding habitats with full sunlight penetration.
 It is considered an aggressive invasive species in North America; invading a wide range of habitats due to its environmental tolerance and tendency to outcompete native vegetation.
 This species is considered a threat in several areas that causes problems relating to overall environmental health and stability.
 Aside from its environmental implications, T. japonica has potential to fight several cancers through a terpene it produces called Torilin, extracted from its fruits.
The red imported fire ant ("Solenopsis invicta"), also known as the fire ant or RIFA, is a species of ant native to South America.
 A member of the genus "Solenopsis" in the subfamily Myrmicinae, it was described by Swiss entomologist Felix Santschi as a variant in 1916.
 Its current name "invicta" was given to the ant in 1972 as a separate species.
 However, the variant and species were the same ant, and the name was preserved due to its wide use.
 The red imported fire ant is native to South America but it has been accidentally introduced in Australia, New Zealand, several Asian and Caribbean countries and the United States.
 The red imported fire ant is polymorphic as workers appear in different shapes and sizes.
 The ant's colours are red and somewhat yellowish with a brown or black gaster.
 However, males are completely black.
 Red imported fire ants are dominant in altered areas and live in a wide variety of habitats.
 They can be found in rain forests, in disturbed areas, deserts, grasslands, alongside roads and buildings, and in electrical equipment.
 Colonies form large mounds constructed from dirt with no visible entrances because foraging tunnels are built and workers emerge far away from the nest.
The mountain swiftlet ("Aerodramus hirundinaceus") is a species of swift in the family Apodidae.
 It is endemic to the island of New Guinea and the nearby islands of Karkar, Yapen and Goodenough.
 It was once placed in the genus "Collocalia" but has been moved, with many others, to "Aerodramus".
 The species is divided into three subspecies, with the nominate, "A. h. hirundinacea" ranging over most of New Guinea, the subspecies "A. h. excelsus" occurring over 1600 m in the Snow Mountains and Cartenz peaks of Irian Jaya and "A. h. baru" being restricted to Yapen Island.
 It occurs in alpine areas from 500 m to the treeline.
 Its natural habitat is tropical moist montane forests and other mountainous habitats in New Guinea.
 It also occurs in lower numbers in the lowlands near hills.
Orobanche valida is a species of broomrape known by the common name Rock Creek broomrape.
 It is endemic to California, where its two uncommon subspecies grow in mountainous habitats separated by several hundred miles.
 Howell's broomrape, ssp.
 "howellii", is limited to the North Coast Ranges north of the San Francisco Bay Area, where it grows in chaparral, often on serpentine soils.
 The similarly rare subspecies "valida" is known from only four occurrences in the Transverse Ranges.
 The plant is a parasite growing attached to the roots of other plants, generally shrubs; ssp.
 "howellii" can often be found on "Garrya" species.
 The plant produces a hairy, glandular purple stem up to about 35 centimeters tall.
 As a parasite taking its nutrients from a host plant, it lacks leaves and chlorophyll.
 The inflorescence is a small cluster of tubular purple flowers 1 to 2 centimeters long.
The mountain hare ("Lepus timidus"), also known as blue hare, tundra hare, variable hare, white hare, snow hare, alpine hare, and Irish hare, is a Palearctic hare that is largely adapted to polar and mountainous habitats.

Question: Which genus is found in open or mountainous habitats, Solenopsis or Origanum?
Answer: Origanum