Dichotomous Key
(A) Plant with needles
(B)Pinecone present – plant #1
(A’). Plant without needles
(C). Plant with teeny tiny flowers, packed closely together
(D). Flower color: yellow – plant #4
(C’). Plant with flowers, not packed closely
(E). Petal color purple – plant #3
(E’). Petal color white – plant #2
Key C, “plant with teeny tiny flowers packed closely together”:
None of the pictures showed a measurement scale, but you clarified by listing yellow flower.