Question: Which plant genus includes more species, Cavendishia or Dioscorea?

Context paragraphs:
Dioscorea orangeana: Dioscorea orangeana, is a tuberous vining flowering plant in the genus "Dioscorea", endemic the Forêt d’Orangea near Antsiranana in Madagascar, from which it derives its name.  The tuber is possibly edible, and unlike most other "Dioscorea" species, the tuber has many finger-like lobes as opposed to a single tuber.  Because the plant is new to science and the possible harvesting by local populations, the conservation status of "Dioscorea orangeana" is of great concern.

Taradi: Taradi, or Himalayan yam, is a little-studied plant which appears above the ground as a low vine, but underground bears long, convoluted tuber growth stretching sometimes as deep as 2 metres.  It is native to Palampur in northern India.  It has received very little attention from botanists, and its species has not even been determined or named, although its morphology and life patterns show it to belong in the "Dioscorea" genus, so it has been referred to as "Dioscorea spp." .

Caryodendron: Caryodendron is a plant genus of the family Euphorbiaceae first described as a genus in 1860.  The genus includes "C. orinocense", known as the Inchi tree or Tacay nut.  It is native to Central America and South America.

Linnaea: Linnaea is a plant genus which has often been classified in the family Caprifoliaceae (the Honeysuckle family) but may be more accurately considered to belong to its own family, Linnaeaceae.  The genus includes a single, generally boreal to subarctic woodland subshrub species, Linnaea borealis, commonly known as twinflower (sometimes written twin flower).

Cavendishia: Cavendishia is a genus of about 100 species of woody perennial plants, many of which are epiphytic.  The genus is native to tropical South America and Central America.

Dioscorea: Dioscorea is a genus of over 600 species of flowering plants in the family Dioscoreaceae, native throughout the tropical and warm temperate regions of the world.  The vast majority of the species are tropical, with only a few species extending into temperate climates.  It is named after the ancient Greek physician and botanist Dioscorides.

Hebe (plant): Hebe is a genus of plants native to New Zealand, Rapa in French Polynesia, the Falkland Islands, and South America.  It includes about 90 species and is the largest plant genus in New Zealand.  Apart from "H. rapensis" (endemic to Rapa), all species occur in New Zealand.  This includes the two species, "H. salicifolia" and "H. elliptica", that have distributions extending to South America.  The genus is named after the Greek goddess of youth, Hebe.

Dioscorea trifida: Dioscorea trifida is a species of flowering plant in the family Dioscoreaceae.  It is a species of yam (genus "Dioscorea").  It is native to the Caribbean and Central and South America.  Its many common names include Indian yam, cush-cush, and yampee.  It is called mapuey in Venezuela, inhame in Brazil, tabena and ñame in Colombia, sacha papa in Peru, and ñampi in Costa Rica.

Banksia sessilis: Banksia sessilis, commonly known as parrot bush, is a species of shrub or tree in the plant genus "Banksia" in the family Proteaceae.  It had been known as Dryandra sessilis until 2007, when the genus "Dryandra" was sunk into "Banksia".  The Noongar peoples know the plant as Budjan or Butyak.  Widespread throughout southwest Western Australia, it is found on sandy soils over laterite or limestone, often as an understorey plant in open forest, woodland or shrubland.  Encountered as a shrub or small tree up to 6 m in height, it has prickly dark green leaves and dome-shaped cream-yellow flowerheads.  Flowering from winter through to late spring, it provides a key source of food—both the nectar and the insects it attracts—for honeyeaters in the cooler months, and species diversity is reduced in areas where there is little or no parrot bush occurring.  Several species of honeyeater, some species of native bee, and the European honey bee seek out and consume the nectar, while the long-billed black cockatoo and Australian ringneck eat the seed.  The life cycle of "Banksia sessilis" is adapted to regular bushfires.  Killed by fire and regenerating by seed afterwards, each shrub generally produces many flowerheads and a massive amount of seed.  It can recolonise disturbed areas, and may grow in thickets.

Dioscorea elephantipes: Dioscorea elephantipes (elephant's foot or Hottentot bread; syn.  "Testudinaria elephantipes"), is a species of flowering plant in the genus "Dioscorea" of the family Dioscoreaceae, native to the dry interior of South Africa,

Supporting paragraphs: Cavendishia Dioscorea
Answer: Dioscorea