Question: Which Genus has more species Cryptomeria or Smilax ?

Context paragraphs:
Smilax china: Smilax china is a climbing plant species in the genus "Smilax".  It is native to China, Korea, Taiwan, Japan (including Ryukyu and Bonin Islands), Philippines, Vietnam, Thailand, Myanmar, and Assam.  Common names for the plant include China root.

Smilax: Smilax is a genus of about 300–350 species, found in the tropics and subtropics worldwide.  In China for example about 80 are found (39 of which are endemic), while there are 20 in North America north of Mexico.  They are climbing flowering plants, many of which are woody and/or thorny, in the monocotyledon family Smilacaceae, native throughout the tropical and subtropical regions of the world.

Taxodium: Taxodium is a genus of one to three species (depending on taxonomic opinion) of extremely flood-tolerant conifers in the cypress family, Cupressaceae.  The generic name is derived from the Latin word "taxus", meaning "yew", and the Greek word "εἶδος" ("eidos"), meaning "similar to."  Within the family, "Taxodium" is most closely related to Chinese swamp cypress ("Glyptostrobus pensilis") and sugi ("Cryptomeria japonica").

Smilax aristolochiifolia: Smilax aristolochiifolia, also known as gray sarsaparilla, Mexican sarsaparilla, sarsaparilla, is a species in the genus "Smilax" and the family Smilacaceae, native to Mexico and Central America.  It is widely used as traditional medicine to treat many symptoms.

Cryptomeria: Cryptomeria (literally "hidden parts") is a monotypic genus of conifer in the cypress family Cupressaceae, formerly belonging to the family Taxodiaceae.  It includes only one species, Cryptomeria japonica (syn.  "Cupressus japonica" L.f.).  It is endemic to Japan, where it is known as sugi (Japanese: 杉 ).  The tree is called Japanese sugi pine or Japanese red-cedar in English.

Smilax zeylanica: Smilax zeylanica is a plant species in the genus "Smilax".  Its leaves and roots are used for medicinal purposes.  The plant is widespread in India, and native in other parts of the Indian Subcontinent as well as in Myanmar, Malaysia, Java and Solomon Islands.  It is traditionally used for the treatment of ulcers.  It is one of the larval host plants of the butterfly "Zesius chrysomallus".

Smilax sect. Nemexia: Smilax" sect.  "Nemexia is a section of plants in the family Smilacaceae.  It consists of the herbaceous plants within the genus "Smilax".  "Smilax" species fall into two groups with distinctive morphologies: one group has woody perennial stems with thorns and a vining habit, while the other group has herbaceous stems that die back to the ground each winter.  "S." sect.  "Nemexia" is the taxon that comprises the herbaceous species.  In the past it was often a genus of its own under the name Nemexia and taxonomists still need further study of the species of "Smilax" to determine its proper rank.  However the widely accepted taxonomic system of the "Flora of North America" does not recognize "Nemexia", nor does the AP-site.  Thus "Nemexia" is not currently considered an accepted genus taxon by most plant taxonomists.

Bamboo vine: Bamboo vine is a common name for several plants species in the genus "Smilax" and may refer to:

Smilax glabra: Smilax glabra, the Chinaroot, "tufuling" (土茯苓) or sarsaparilla, is a plant species in the genus "Smilax".  It is native to China, the Himalayas, and Indochina.

Smilax anceps: Smilax anceps is a vigorous scrambling vine or shrub, and is one of some 278 species in the genus "Smilax" in the family Smilacaceae.  The species is widespread in Tropical Africa, Southern Africa, Réunion, Mauritius, Comoros, and Madagascar.  The specific name 'anceps' is Latin for 'dangerous', a caution against the hooked prickles.  "Tarundia cinctipennis" Stål, 1862, a hemipteran insect, is associated with this plant.

Supporting paragraphs: Cryptomeria Smilax
Answer: Smilax