Simplify the following text for a Grade 8 native English-speaking person.
Original: Asclepias fascicularis is a species of milkweed known by the common names narrowleaf milkweed and Mexican whorled milkweed .
Simplified: Narrow-leaf Milkweed ( Asclepias fascicularis ) is a species os milkweed plant . It is also known as Mexican Whorled Milkweed .