San Francisco Botanical Gardens, part 1: Primitive Plant Garden

The San Francisco Botanical Gardens are quite large; I was only able to see part of them, as it was well on in the afternoon when I started. I entered via the "Friend Gate", across the road from the Japanese Tea Garden that I couldn't enter. The entrance area is Australian flora; there's a nice map near the gate showing the layout of the gardens.
( Pictures and a map or two )