Dryandra subg. Hemiclidia

[1] Twenty years later, Brown published a further eleven species and the first infrageneric arrangement in his Supplementum primum prodromi florae Novae Hollandiae.

By this time, Brown had observed the tendency in D. falcata for one of the two ovules in each follicle to abort, thereafter developing into a winglike appendage to the seed separator.

On this basis, he transferred the species into a monotypic genus, which he named Hemiclidia,[2] from the Greek hemi ("half") and perhaps kleidos ("barrier", "means of closing").

Bentham correctly observed that the abortion of seeds occurs in other Dryandra species, and is a diagnostically unimportant character: "as far as I can understand the characters given, the difference in the fruit upon which the genus Hemiclidia was founded is merely the result of the abortion of one ovule, which occurs occasionally or perhaps constantly in one or two other species of Dryandra.

He segregated D. falcata and the newly published D. glauca (now Banksia glaucifolia) into a subgenus based on their unusual follicles, which are small, hairy and pliable.