Complex sentence: Assam tea is manufactured specifically from the plant Camellia assamica, that is commonly (mistakenly) referred to as "Camellia sinensis var. assamica".
Split into simpler sentences: Assam tea is manufactured specifically from the Camellia assamica species of the Camellia plant. The Camellia assamica species is commonly (mistakenly) referred to as "Camellia sinensis var. assamica".