Excerpt from Phytologia, Vol. 74: An International Journal to Expedite Plant Systematic Phytogeographical and Ecological Publication, May 1993

In short, inclusion of Proastio vanillosma makes little or no phyletic or nu merical sense if positioned among the approximately 70 species of Acourtia, all of which are confined to the mainland areas of North America. Indeed, con sidering its size, Acourtia is a remarkably uniform genus, both as to habit, head structure and ¿oral morphology, although Cabrera (1992) has proposed, after cladistic analysis, that the approximately fifteen scapose elements of Accur tia be segregated as a distinct genus, a proposal that makes no taxonomic sense to me, largely because these cannot be readily related to any element of the Mutisieae other than Acourtia. Unfortunately, she did not account for Proastio vanillosma in her cladistic analysis.

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