"Stackhousia, viminea or nuda". Some basic botany, the term inflorescence is used to describe an arrangement of flowers on a specialized stem. Where individual flowers are stalkless they are called, sessile as here. According to Barry's notes, "There are two kinds of inflorescence, a 'raceme' where a steadily growing tip produces flowers laterally along eh way...and a 'cyme' where each flower terminates at a growing tip, so the next bud must start from below the previous flower in a sort of 'zig zag'....The main stem of an inflorescence is called a peduncle...". Here is an example of a spike, which is a raceme with sessile flowers. The "Stackhousia sp." are unusual in our experience and here is my only image.
Wooli wildflowers brian