Keys
BRAHMS online: http://posa.sanbi.org/sanbi/Explore
A key and description of many hermannias can be found here:
Bothalia 13,1 & 2: 1-63 (1980)
Revision of Hermannia subgenus Hermannia in southern Africa
I. C. VERDOORN*
https://abcjournal.org/index.php/abc/article/view/1291/1249
I-spot keys: including erepsia, metalasia, ferns, podalyrias and ericas amongst others.
https://www.ispotnature.org/webkeys-za/index.jsp
Various: http://biodiversityadvisor.sanbi.org/research-and-modelling/identification-keys/
including
Conophytum: http://rpowell2.wix.com/conophytum-delta-key
Helichrysum:
http://keys.lucidcentral.org/keys/v3/helichrysum/Helichrysum.html