Question: Are Drosanthemum and Gentiana both succulent plants?

Context articles: Leaf window
Conophytum
Cerochlamys
Succulent plant
Botanical garden
Namaqua National Park
Drosanthemum
Lithops
Drosanthemum candens
Gentiana

Leaf window, also known as epidermal window, is a specialized leaf structure consisting of a translucent area where sunlight can enter into the interior surfaces of the plant's modified leaf where photosynthesis can occur.
 This is also known as fenestration.
 The translucent structure may include epidermal tissue, and in some succulent plants it consists of several cell layers of parenchyma, which may also function as water-storage tissue.
 It can appear as a large continuous patch, a variegated or reticulated region, or as numerous small spots.
 This structural adaptation is found in certain succulent plants native to arid climates, which allow much of the plant to remain beneath the soil surface where it is protected from desiccation of extreme winds and heat while optimizing the absorption of light by increasing the photosynthetic surface area.
 Many of the known species containing leaf windows are native to South Africa and neighbouring countries.
Conophytum is a genus of South African and Namibian succulent plants that belong to the Aizoaceae family.
 The name is derived from the Latin “conus” (cone) and Greek “phytum” (plant).
 The plants are also known as knopies (buttons), waterblasies (water blisters), sphaeroids, conos, cone plants, dumplings, or button plants.
Cerochlamys is a genus of plants in the family Aizoaceae.
 They are all succulent plants, with fleshy, water-storing leaves.
 These plants bear small, somewhat daisy-like flowers, usually in shades of pink or purple.
In botany, succulent plants, also known as succulents or sometimes water storage plants, are plants that have some parts that are more than normally thickened and fleshy, usually to retain water in arid climates or soil conditions.
 The word "succulent" comes from the Latin word "sucus", meaning juice, or sap.
 Succulent plants may store water in various structures, such as leaves and stems.
 Some definitions also include roots, so that geophytes that survive unfavorable periods by dying back to underground storage organs may be regarded as succulents.
 In horticultural use, the term "succulent" is often used in a way which excludes plants that botanists would regard as succulents, such as cacti.
 Succulents are often grown as ornamental plants because of their striking and unusual appearance.
A botanical garden or botanic garden is a garden dedicated to the collection, cultivation and display of a wide range of plants labelled with their botanical names.
 It may contain specialist plant collections such as cacti and other succulent plants, herb gardens, plants from particular parts of the world, and so on; there may be greenhouses, shadehouses, again with special collections such as tropical plants, alpine plants, or other exotic plants. Visitor services at a botanical garden might include tours, educational displays, art exhibitions, book rooms, open-air theatrical and musical performances, and other entertainment.
Namaqua National Park is a South African national park situated approximately 495 km north of Cape Town and 22 km northwest of Kamieskroon.
 It has an area of more than 700 km.
 The park is part of Namaqualand, an area covering 55,000 km located within the semi-desert Succulent Karoo biome.
 This biome is a biodiversity hotspot with the largest concentration of succulent plants in the world.
 The park also has an arid environment with succulent plants.
 The park was created to protect its flowers.
 During the spring, wildflowers bloom there in a spectacular fashion.
 The park's main tourist attraction is this abundant spring bloom of brightly coloured wildflowers.
Drosanthemum ("dewflowers") is a genus of succulent plants in the ice plant family native to the winter-rainfall regions of southern Africa.
 Most species bear colorful flowers.
Lithops is a genus of succulent plants in the ice plant family, Aizoaceae.
 Members of the genus are native to southern Africa.
 The name is derived from the Ancient Greek words λίθος ("lithos"), meaning "stone," and ὄψ ("ops"), meaning "face," referring to the stone-like appearance of the plants.
 They avoid being eaten by blending in with surrounding rocks and are often known as pebble plants or living stones.
 The formation of the name from the Greek "-ops" means that even a single plant is called a Lithops.
Drosanthemum candens, commonly known as rodondo creeper or dew-flower, is a succulent plant in the ice plant family, Aizoaceae.
 The species is native to the Eastern Cape in South Africa and is naturalised in Portugal and the states of South Australia, Western Australia, and Victoria in Australia.
 It is a trailing perennial with hairy stems and leaves that are either cylindrical or triangular in cross section.
 These are between 3 and 15 mm in length and 1 to 2.5 mm in width.
 Flowers are up to 2.5 cm in diameter and are pink or occasionally white.
Gentiana is a genus of flowering plants belonging to the gentian family (Gentianaceae), the tribe Gentianeae, and the monophyletic subtribe Gentianinae.
 With about 400 species it is considered a large genus.
 They are notable for their mostly large, trumpet-shaped flowers, which are often of an intense blue.