This section is from the book "Handbook Of Hardy Trees, Shrubs, And Herbaceous Plants", by W. Botting Hemsley. Also available from Amazon: Handbook of hardy trees, shrubs, and herbaceous plants.
Annuals of less graceful habit than those in the last genus, but almost identical in floral characters, the main difference being in the achenes, which terminate in a slender beak bearing the pappus. Involucral bracts all coloured, gradually passing from small sessile outer ones to those with a slender claw and large limb. There are about six species, all from Australia. This genus was named in honour of a German botanist.
1. W. corymbosa, syn. W. acuminata. - An erect and branching plant clothed with a rough pubescence. Leaves linear, with revolute margins clasping the stem. Flower-heads yellow or pink, in dense terminal corymbs. Involucral bracts with long acuminate points, usually with a few straggling ones below the head. Terminal beak much longer than the achene.
2. W. aurea, syn. Morna nitida. - Very near the last, with less pointed bracts of a golden yellow, and the flower-heads in a looser corymb.
W. Steetziana, syn. W. tenella, is a dwarfer plant with smaller flower-heads from pure white to a bright yellow; and W. nivea is very near No. 2, differing however in having comparatively longer florets and white or pink bracts.