Limnocharis is a genus of plants in the family Alismataceae, native to Mexico, Central America, the West Indies and South America) but naturalized in China, India, and Southeast Asia as well.
 Two species are recognized as of May 2014:
Fejervarya kawamurai is a species of frog in the Dicroglossidae family.
 It is endemic to Taiwan, Japan (Ryukyu Islands and Honshu), and China.
 It belongs to the "Fejervarya limnocharis" species complex.
Fejervarya limnocharis is a species of frog found widely distributed in South Asia.
 It is known under many common names, including Indian cricket frog, Boie's wart frog, rice field frog, and Asian grass frog.
 Molecular studies of the species complex suggest that there may be multiple species involved.
Tetracentron is a genus of flowering plant, the sole living species being Tetracentron sinense.
 It was formerly considered the sole genus in the family Tetracentraceae, though modern botanists include it in the family Trochodendraceae together with the genus "Trochodendron".
Trochodendron aralioides, sometimes colloquially called "wheel tree", is a flowering plant and the sole living species in the genus "Trochodendron", which also includes several extinct species.
 It was also often considered the sole species in the family Trochodendraceae, though botanists now include the distinct genus "Tetracentron" in the same family.
 "T.aralioides" is native to Japan, southern Korea and Taiwan.
Astragalus montii is a rare species of flowering plant in the legume family known by the common name heliotrope milkvetch.
 It is endemic to Utah in the United States, where there are only three known populations.
 It is a federally listed threatened species of the United States.
 This species is often treated as a variety of "Astragalus limnocharis".
Limnocharis flava (commonly known as yellow velvetleaf, sawah flower rush, sawah lettuce) is a species of aquatic flowering plant which is native to Mexico, Central America, South America, Cuba, Haiti and the Dominican Republic but widely naturalized in southern and southeastern Asia: India, Sri Lanka, Cambodia, Burma, Thailand, Vietnam, Indonesia, Malaysia and southern China (Guangdong, Yunnan).
Trochodendraceae is the only family of flowering plants in the order Trochodendrales.
 It comprises two extant genera, each with a single species found in south east Asia.
 The two living species ("Tetracentron sinense" and "Trochodendron aralioides") both have secondary xylem without vessel elements, which is quite rare in angiosperms.
 As the vessel-free wood suggests primitiveness, these two species have attracted much taxonomic attention.
Fejervarya sakishimensis is a species of frog in the Dicroglossidae family.
 It is endemic to Taiwan and the Ryukyu Islands of Japan.
 It belongs to the "Fejervarya limnocharis" species complex.
Species collected for human consumption are "Hoplobatrachus rugulosus", "Fejervarya limnocharis", "Glyphoglossus molossus", "Kaloula pulchra", "Duttaphrynus melanostictus", and "Pelophylax lateralis" (with "P. lateralis" found only north of the Mekong River in localities such as Snuol District, Kratie Province). "
Kaloula mediolineata" is also likely consumed in northern Cambodia. "
Glyphoglossus molossus" is the species most vulnerable to harvesting activities, while wild populations of "Hoplobatrachus rugulosus" are also declining due to intensive harvesting.

Question: Are Tetracentron and Limnocharis both genuses?
Answer: yes