Australian plectranthus question

[random]

How does one tell the difference between Plectranthus cremnus and Plectranthus graveolens ?

In the google images i've seen, they both kinda look the same.

[ferret]

http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=gn&name=Plectranthus

7 Margins of leaves with 10–23 pairs of teeth; lamina always densely hairy 8

8 Hairs of branches of 2 types, always with gland-tipped more or less spreading hairs, and usually with spreading multicelled hairs

= Plectranthus graveolens

or

7* Margins of leaves with 4–9 pairs of teeth, if 10–12 pairs of teeth then leaves sparsely hairy 9

9 Branches moderately to densely covered with long, more or less spreading multicelled hairs and glands absent

= Plectranthus cremnus

crenmus: lamina 35–40 mm long, 45–50 mm wide

graveolens: lamina usually 45–105 mm long, 35–75 mm wide

[random]

Thankyou so much, really appreciate that. Now to decipher and compare my plants. Cheers!

[tarenna]

I know both of them in the wild - they are noticeably different, cremnus is more densely hairy, although this can vary according to proximity to the ocean.