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Andrew Flower ... "T. velickiana x macdougallii. Cross made November 2000, first flowerings 2009.
This was one of those infuriating crosses where different ovaries got pollinated by different fathers; I have never got single velickiana to self-pollinate - however - so far as I can tell the species that do not normally self have a mechanism whereby they actively produce a substance that inhibits the stigma from accepting its own pollen but if foreign pollen lands on the stigma then the production of the inhibitary substance may be switched off, thereby allowing own pollen to be accepted.
There have been a number of instances here where crosses have some ovaries pollinated by a foreign species and some pollinated by their own pollen. In this case, I got some Mr Toots and some T. velickiana seedlings: attached are pics of AB872135-5113 (Mr Toot = velickiana x macdougallii) and AB872135-5117 (not Mr Toot = T. velickiana). Commercially, this has meant I can only sell offsets of individuals that have flowered and known to be good Toots! Just to confuse the issue further, there are also some not-quite Toots appearing as well - which leads me to question the purity of mother velickiana AB173 which was imported here from a USA nursery in 1990.
Incidentally, if anyone wonders how the seedling numbering system works: The 6 numbers with "AB" prefix is the batch number for seedlings from a single seed pod and the 4 number suffix refers to an individual seedling from that batch. Suffixes are only applied to seedlings that need to be identified individually for some reason."