Complex sentence: It consists of plants that were native to this area in pre-colonial times and were planted here until 1978, on a rectangular plot of 25'x 40' situated in lower Manhattan at the northeast corner of La Guardia Place and West Houston Street.
Split into simpler sentences: It consists of plants that were native to this area in pre-colonial times. These planted were replanted here until 1978, on a rectangular plot of 25'x 40' situated in lower Manhattan at the northeast corner of La Guardia Place and West Houston Street.