The September issue of Curtis's is devoted to Tropaeolum sect. Chilensia, including the new (or newly-elevated) sp. T. austropurpureum: http://onlinelibrary.wiley.com/doi/10.1111/… There does not seem to be an easy way for non-subscribers to view the issue online, but Tropaeolephiles might want to order the printed issue. Best Max Oakland