Multiples of 2 sts +1 (add 2 for base chain)
Special Abbreviation: M3C = Marguerite cluster with 3 spike loops
Row 1: M3C (Make a spike loop [i.e. yo and draw through] into 2nd, 3rd, and 5th chs from hook, yo and through all 4 loops), *ch1, make 1 M3C picking up 1 loop in ch that closed previous M3C, 2nd loop in same place as last spike of previous M3C, skip 1 ch, then last loop in next ch, yo and through all 4 loops; rep from * to end, turn.
Row 2: Ch3, make 1M3C picking up loops in 2nd and 3rd ch from hook and in ch that closed 2nd M3C on previous row, *ch1, work 1M3C picking up 1st loop in ch that closed previous M3C, 2nd loop in the same place as last spike of previous M3C and last loop in ch that closed next M3C on previous row; rep from * to end, picking up final loop in top of ch at beginning of previous row.
Rep row 2 until you reach your finished size.