KIRSTENBOSCH NATIONAL BOTANICAL GARDEN
Cape Town, South Africa, August 2023.

 I searched the Internet to try to identify this plant, I might be wrong.
Leucadendron argenteum

Leucadendron argenteum is mentioned in
 CONQUERING TABLE MOUNTAIN 
By Kirsten Honeyman
THE MEDITERRANEAN GARDEN number 90 October 2017

For photographs see
http://www.mediterraneangardensocietyarchive.org/90-table.html

KIRSTENBOSCH NATIONAL BOTANICAL GARDEN
Cape Town, South Africa, August 2023.
Strelitzia reginae
And as a bonus a stamp from South Africa depicting the Strelitzia

 THE MEDITERRANEAN GARDEN NUMBER 107 January 2022
BIRDS OF PARADISE by Geoff Crowhurst

KIRSTENBOSCH NATIONAL BOTANICAL GARDEN
Cape Town, South Africa.

The photos of plants seen in Kirstenbosch were sent to me by a nephew who visited the gardens in August 2023.

There are many articles in THE MEDITERRANEAN GARDEN mentioning Kirstenbosch, I will be referring to several of them.

First a general view of the garden. 

THE MEDITERRANEAN GARDEN number 71 January 2013
An interesting article all about the garden
KIRSTENBOSCH BOTANICAL GARDEN by Margaret Johnston

Clematis tangutica
 A stamp issued by Poland in 1984

This plant is mentioned in TWO GARDENS by Carole Cross
THE MEDITERRANEAN GARDEN number 78 October 2014
Photographs illustrating this article can be found here.

http://www.mediterraneangardensocietyarchive.org/78-twogardens.html

Dicendra spectabilis

A stamp issued by Tanzania in 1994 in a series named
TROPICAL FLOWERS

The only photos I have of this plant are of the white version snapped in the Royal Botanic Garden Madrid   in 2018