Karwinskii is a winter blooming large caney plant. The species seems to be the one which has felted white stems and under the leaves and pinky reddish flowers late winter. It will be 2-3m high. However it seems to be very promiscuous and there are a number of variations.
From my original seed I kept one which seems to stay at about 1.5m with peachy pink flowers and a similar size one which has cyclamen pink flowers. These two start flowering about the beginning of winter. There is another in Australia called ‘Winter Red’.
I don’t know who introduced the very large one which may be the species. This is the latest to flower that I have. Then there is the one I named ‘Winter Lipstick’ that I sold for a long time as involucrata x karwinskii, rather a mouthful for most people and needing a common name. This is very long flowering for me, from May to November, although a heavy frost could set it back. Because it flowers for such a long time it can recover from the frosting and flower again. This is listed on its own. “Timboon’ is similar to ‘Winter Lipstick’ and an excellent plant.