Question: Are both Ptychosperma and Conophytum succulent plants?

Context articles: Conophytum
Conophytum stephanii
Conophytum jucundum
Conophytum hammeri
Succulent plant
Ptychosperma
Conophytum elegans
Conophytum piluliforme
Conophytum ficiforme
Namaqua National Park

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.
Conophytum stephanii is a small South African species of "Conophytum" succulents named after German plant collector Paul Stephan, who tended the succulent collection at the Hamburg Botanic Garden in Hamburg, Germany.
 The plant was first described by Dr. Schwantes in 1929 and published in "Die Gartenwelt" 33:25.
Conophytum jucundum is a species of succulent plants belonging to the Aizoaceae family.
Conophytum hammeri is a small, endangered, South African species of succulent plant, of the genus "Conophytum".
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.
Ptychosperma is a genus of flowering plant in the Arecaceae family.
 Most are native to Australia and/or New Guinea, with a few in the Solomon Islands and in Maluku Province of eastern Indonesia.
 Some have been cultivated abroad as house or garden plants, and reportedly naturalized in certain regions (Caribbean, Polynesia, Fiji, Florida).
Conophytum elegans is a succulent plant species in the genus "Conophytum".
Conophytum piluliforme is a small South African species of succulent plant of the genus "Conophytum".
Conophytum ficiforme is a small South African species of succulent plant of the genus "Conophytum".
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.