Table 1. The size of taxon datasets analysed in the study.

Dataset	Family	Total species in CFR	Taxa analysed	Cape clade	Source b
Combined Dataset	All	9 383	4 303	Several	Various, see taxa below in this table
Asteraceae	Asteraceae	1 077	432	Several	Various revisions, BOL
Bruniaceae	Bruniaceae	78	78	Bruniaceae	[42]
Ericaceae	Ericaceae	680	806	Erica	[42]
Fabaceae	Fabaceae	764	328	Several	[42]
Geophytes	Numerous	1 635	408	Several	Various revisions
Orchidaceae	Orchidaceae	234	391	Disinae	Herbaria
Poaceae	Poaceae	217	138	Danthoniae	Herbaria
Polygalaceae	Polygalaceae	142	120	Muraltia	[42]
Proteaceae	Proteaceae	333	389	Proteae	[42]; Protea Atlas Project (http://www.protea.worldonline.co.za/default.htm)
Red Data List Taxa	Numerous	3 087 a	1 538	Several	South African RDL [81]
Restionaceae	Restionaceae	342	346	African Restionaceae	Various herbaria; [13]
Rosaceae	Rosaceae	131	121	Cliffortia	Revision
Rutaceae	Rutaceae	295	279	Diosmeae	Revisions

Taxon datasets are compared with species diversities from Manning and Goldblatt [27]. The numbers of taxa in the study may exceed those of Manning and Goldblatt [27] for two reasons. Firstly, Manning and Goldblatt [27] list only species, while infra-specific taxa are included here. Secondly, entire clades were analysed where possible, while Manning and Goldblatt [27] list only taxa in their geographically predefined CFR.

^a Fynbos biome taxa of conservation concern as reported by Manning and Goldblatt [27]

^b Contact details of dataset owners are provided in S1 Table