Botanical Cruiser
The Botanical Cruiser was a ship, presumably used for creating food from plants or for use as a vacation spot. New President Laura Roslin visited the ship while gathering a fleet from surviving civilian ships surrounding the colony of Caprica. A young girl named Cami and her grandmother were on the Botanical Cruiser with many other survivors when the Cylon Attack occurred.
Unfortunately, the ship lacked an FTL drive, and the light-speed-enabled part of President Roslin's convoy of refugee ships were forced to leave the Botanical Cruiser and many other sublight ships behind when Cylon Raiders discovered the fleet of ships. All the sublight ships were presumed destroyed by Cylon forces (Miniseries).
Notes
The Botanical Cruiser was an homage to the Agro Ships from the original Battlestar Galactica (TOS), which themselves were re-used models from the botanical spacecraft from the movie Silent Running, a Universal/MCA movie that special effects guru John Dykstra worked on a few years prior to the Original Series.
The Botanical Cruiser has cropped up again in the series, primarily in background shots depicting all or most of the Fleet. Reuses of stock footage from the Miniseries, primarily the infamous FTL jump scene have also put the Botanical Cruiser in the Fleet.