Identify each of the following characteristics or descriptions as Lycopodium sp. or Selaginella sp., using the following key. (Both may apply to some characteristics listed.) L = Lycopodium S = Selaginella
They have rhizomes that branch horizontally, producing aerial stems and underground roots.
Their leaves have a ligule, or tongue, on the upper surface.
They are heterosporus
They are homosporus.
They have strobili.
They have simple, scalelike leaves on branching stems from which roots arise.
They are known as ground pine.
They are known as spike moss.
nionger dars for many things, Based on the name "scouring rush," what quality best

They have rhizomes that branch horizontally, producing aerial stems and underground roots.  L

Their leaves have a ligule, or tongue, on the upper surface. S

They are heterosporus  S

They are homosporus L

They have strobili.  S L

They have simple, scalelike leaves on branching stems from which roots arise.  S

They are known as ground pine.  L

They are known as spike moss.  S

Explanation:

Lycopodium is known as as ground pine, and is a genus of clubmosses. They are homosporus, because they produce only one type of sporangia, while Selaginella are heterosporus, because they produce microspores and megaspores, and they are known as spike moss. Both of them, lycopodium and selaginella can have strobili.