Villadia is a genus of family

Family (biology)

In biological classification, family is* a taxonomic rank. Other well-known ranks are life, domain, kingdom, phylum, class, order, genus, and species, with family fitting between order and genus. As for the other well-known ranks, there is the option of an immediately lower rank, indicated by the...

 Crassulaceae

Crassulaceae

Crassulaceae, or the orpine family, are a family of dicotyledons. They store water in their succulent leaves. They are found worldwide, but mostly occur in the Northern Hemisphere and southern Africa, typically in dry and/or cold areas where water may be scarce...

. It includes about 25 to 30 species

Species

In biology, a species is one of the basic units of biological classification and a taxonomic rank. A species is often defined as a group of organisms capable of interbreeding and producing fertile offspring. While in many cases this definition is adequate, more precise or differing measures are...

 distributed from Texas

Texas

Texas is the second largest U.S. state by both area and population, and the largest state by area in the contiguous United States.The name, based on the Caddo word "Tejas" meaning "friends" or "allies", was applied by the Spanish to the Caddo themselves and to the region of their settlement in...

 to Peru

Peru

Peru , officially the Republic of Peru , is a country in western South America. It is bordered on the north by Ecuador and Colombia, on the east by Brazil, on the southeast by Bolivia, on the south by Chile, and on the west by the Pacific Ocean....

.

Synonyms

Altamiranoa was a genus

Genus

In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...

 of the Crassulaceae

Crassulaceae

Crassulaceae, or the orpine family, are a family of dicotyledons. They store water in their succulent leaves. They are found worldwide, but mostly occur in the Northern Hemisphere and southern Africa, typically in dry and/or cold areas where water may be scarce...

, that Joseph Nelson Rose

Joseph Nelson Rose

Joseph Nelson Rose was an American botanist. He was born in Union County, Indiana. His father died serving during the Civil War when Joseph Rose was a young boy. He later graduated from high school in Liberty, Indiana....

 proposed in the early 1900's for 12 Mexican species, three described as new and nine formerly in Cotyledon

Cotyledon

A cotyledon , is a significant part of the embryo within the seed of a plant. Upon germination, the cotyledon may become the embryonic first leaves of a seedling. The number of cotyledons present is one characteristic used by botanists to classify the flowering plants...

, Sedum

Sedum

Sedum is a large genus of flowering plants in the family Crassulaceae, members of which are commonly known as stonecrops. It contains around 400 species of leaf succulents that are found throughout the Northern Hemisphere, varying from annual and creeping herbs to shrubs. The plants have...

, or Umbilicus

Umbilicus (genus)

Umbilicus is a genus of over ninety species of flowering plants in the family Crassulaceae. Many of its species have been given synonyms under different genera such as Rosularia, Cotyledon, and Chiastophyllum...

. The name was dedicated to Fernando Altamirano

Fernando Altamirano

Fernando Altamirano was a Mexican physician, botanist and naturalist. He was born in Aculco, studied in Querétaro, and died in Mexico City...

, a Mexican physician, botanist and naturalist that co-worked with J. N. Rose.

Baehni (1937) united the genus Altamiranoa with Villadia, but Walther (1938) refuted the argument and proposed the combined genus be called species of Altamiranoa are best dispersed in Sedum

Sedum

Sedum is a large genus of flowering plants in the family Crassulaceae, members of which are commonly known as stonecrops. It contains around 400 species of leaf succulents that are found throughout the Northern Hemisphere, varying from annual and creeping herbs to shrubs. The plants have...

 genus, but maintained the differences with Villadia genus.

Species listed under Altamiranoa include:

• Altamiranoa albiflora (Villadia albiflora)
• Altamiranoa alpina
• Altamiranoa batesii (Villadia batesii)
• Altamiranoa berillonana
• Altamiranoa calcicola
• Altamiranoa chihuahuensis (Sedum chihuahuensis)
• Altamiranoa cucullata (Villadia cucullata)
• Altamiranoa decipiens
• Altamiranoa diffusa
• Altamiranoa dyvrandae
• Altamiranoa elongata (Sedum jurgensenii)
• Altamiranoa erecta
• Altamiranoa ericoides
• Altamiranoa fusca
• Altamiranoa galeottiana
• Altamiranoa goldmanii (Sedum goldmanii)
• Altamiranoa grandyi (Sedum grandyi)
• Altamiranoa guatemalensis (Villadia guatemalensis)
• Altamiranoa hemsleyana
• Altamiranoa imbricata (Villadia imbricata)
• Altamiranoa incarum (Villadia incarum)
• Altamiranoa jurgensenii (Sedum jurgensenii)
• Altamiranoa levis
• Altamiranoa mexicana
• Altamiranoa minutiflora (Villadia minutiflora)
• Altamiranoa montana
• Altamiranoa necaxana
• Altamiranoa nelsonii (Villadia nelsonii)
• Altamiranoa batesii
• Altamiranoa painteri (Villadia painteri)
• Altamiranoa parva
• Altamiranoa parviflora
• Altamiranoa pringlei (Villadia pringlei)
• Altamiranoa ramosissima
• Altamiranoa ramulos
• Altamiranoa ramulosa
• Altamiranoa scopulina (Sedum scopulinum)
• Altamiranoa squamulosa (Villadia squamulosa)
• Altamiranoa stricta
• Altamiranoa virgata
• Altamiranoa weberbaueri