The Moshavei Yahdav is a group of three moshav

Moshav

Moshav is a type of Israeli town or settlement, in particular a type of cooperative agricultural community of individual farms pioneered by the Labour Zionists during the second aliyah...

im located in the north-western Negev

Negev

The Negev is a desert and semidesert region of southern Israel. The Arabs, including the native Bedouin population of the region, refer to the desert as al-Naqab. The origin of the word Neghebh is from the Hebrew root denoting 'dry'...

 desert between Netivot

Netivot

Netivot is a city in the Southern District of Israel in Israel. At the end of 2009 the city had a total population of 26,700. It was founded in 1956 as a development town along with Sderot to the north, and Ofakim to the south...

 and Ofakim and under the jurisdiction of Bnei Shimon Regional Council

Bnei Shimon Regional Council

The Bnei Shimon Regional Council , is a regional council in the northern Negev in the south of Israel. Most of its territory lies north of Beersheba and the rest bounds Beersheba on the west and east sides as well. The eastern border of this territory straddles the Green Line.There are 13...

. They are:

• Brosh
  Brosh
  Brosh is a moshav in southern Israel. Located in the north-western Negev between Ofakim and Netivot, it falls under the jurisdiction of Bnei Shimon Regional Council. In 2006 it had a population of 221....
  
   (lit. "Cypress
  Cypress
  Cypress is the name applied to many plants in the cypress family Cupressaceae, which is a conifer of northern temperate regions. Most cypress species are trees, while a few are shrubs...
  
  ")
• Ta'ashur
  Ta'ashur
  Ta'ashur is a moshav in southern Israel. Located in the north-western Negev between Ofakim and Netivot, it falls under the jurisdiction of Bnei Shimon Regional Council and covers an area of around 1,200 dunams. In 2006 it had a population of 329....
  
   (lit. "Larch
  Larch
  Larches are conifers in the genus Larix, in the family Pinaceae. Growing from 15 to 50m tall, they are native to much of the cooler temperate northern hemisphere, on lowlands in the north and high on mountains further south...
  
  ")
• Tidhar
  Tidhar
  Tidhar is a moshav in southern Israel. Located in the north-western Negev between Ofakim and Netivot, it falls under the jurisdiction of Bnei Shimon Regional Council and covers an area of around 1,000 dunams. In 2006 it had a population of 233....
  
   (lit. "Plane tree
  Platanus
  Platanus is a small genus of trees native to the Northern Hemisphere. They are the sole living members of the family Platanaceae....
  
  ")

The three moshavim were all established in 1953 by Morrocan

Morocco

Morocco , officially the Kingdom of Morocco , is a country located in North Africa. It has a population of more than 32 million and an area of 710,850 km², and also primarily administers the disputed region of the Western Sahara...

 immigrants

Jewish exodus from Arab lands

The Jewish exodus from Arab and Muslim countries was a mass departure, flight and expulsion of Jews, primarily of Sephardi and Mizrahi background, from Arab and Muslim countries, from 1948 until the early 1970s...

 who were members of the Bnei Moshavim movement. They are all named after a passage from the Book of Isaiah

Book of Isaiah

The Book of Isaiah is the first of the Latter Prophets in the Hebrew Bible, preceding the books of Ezekiel, Jeremiah and the Book of the Twelve...

, specifically Isaiah 41:19:

I will plant in the wilderness the cedar, the acacia-tree, and the myrtle, and the oil-tree; I will set in the desert the cypress, the plane-tree, and the larch together;

As the end, the passage describes the three trees set in the desert "together", from which the group takes its name.