A Russian thistle grows in the burn zone of Chino Hills State Park, as the coronavirus disease (COVID-19) pandemic continues, in Chino Hills, California, U.S., April 21, 2021. REUTERS/Lucy Nicholson 

A Russian thistle is seen in the burn zone of Chino Hills State Park, as the coronavirus disease (COVID-19) pandemic continues, in Chino Hills, California, U.S., April 21, 2021. REUTERS/Lucy Nicholson 

Insignia belonging to Britain's Prince Philip, the Thistle Collar and St Andrew Badge, and the Thistle Breast Star and Badge, are placed on the altar in St George's Chapel, Windsor, ahead of his funeral, Britain April 16, 2021. Picture taken April 16, 2021. Steve Parsons/Pool via REUTERS 

The Thistle Collar and St Andrew Badge, and the Thistle Breast Star and Badge are sewn onto a cushion in St James's Palace following Britain's Prince Philip death, in London, Britain April 13, 2021. Picture taken April 13, 2021. The cushions displaying medals and decorations conferred on the Duke of Edinburgh by the United Kingdom and other countries across the world will be placed on the altar in St George's Chapel, in Windsor, ahead of his funeral on Saturday. Kirsty O'Connor/PA Wire/Pool via REUTERS 

Thistles is seen in a field in Sint-Pieters-Leeuw, Belgium August 7, 2020. REUTERS/Yves Herman 

A light projection shows the painting "Stilleben mit Distelblume" (Still life with thistle bloom) from 1919 of late German-born artist Paul Klee during a media preview of the Illuminated Art Zuerich Ferdinand Hodler & Paul Klee lightshow at the Maaghalle event hall in Zurich, Switzerland August 7, 2019. Picture taken August 7, 2019. REUTERS/Arnd Wiegmann 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 Hearts' John Souttar celebrates scoring their second goal Action Images via Reuters/Jason Cairnduff TPX IMAGES OF THE DAY 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 Hearts' John Souttar celebrates scoring their second goal Action Images via Reuters/Jason Cairnduff 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 Hearts' John Souttar celebrates scoring their second goal Action Images via Reuters/Jason Cairnduff 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 Hearts' John Souttar scores their second goal Action Images via Reuters/Jason Cairnduff 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 Hearts' Uche Ikpeazu scores their first goal Action Images via Reuters/Jason Cairnduff 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 Hearts' John Souttar scores their second goal Action Images via Reuters/Jason Cairnduff 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 Inverness manager John Robertson looks dejected after the match REUTERS/Russell Cheyne 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 Hearts manager Craig Levein applauds fans after the match REUTERS/Russell Cheyne 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 Hearts' Zdenek Zlamal celebrates after the match REUTERS/Russell Cheyne 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 Inverness manager John Robertson shakes hands with Hearts' Zdenek Zlamal after the match REUTERS/Russell Cheyne 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 Inverness manager John Robertson shakes hands with Hearts' Uche Ikpeazu after the match REUTERS/Russell Cheyne 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 Hearts manager Craig Levein celebrates after the match Action Images via Reuters/Jason Cairnduff 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 Hearts manager Craig Levein celebrates after the match Action Images via Reuters/Jason Cairnduff 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 Hearts' Christophe Berra celebrates after the match with John Souttar Action Images via Reuters/Jason Cairnduff 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 Hearts' Christophe Berra celebrates after the match with John Souttar Action Images via Reuters/Jason Cairnduff 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 Hearts' Oliver Bozanic in action with Inverness' Darren McCauley REUTERS/Russell Cheyne 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 General view of fans inside the stadium during the match Action Images via Reuters/Jason Cairnduff 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 Hearts' Sean Clare celebrates scoring their third goal from the penalty spot with Arnaud Djoum Action Images via Reuters/Jason Cairnduff 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 Hearts' Sean Clare scores their third goal from the penalty spot Action Images via Reuters/Jason Cairnduff 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 Hearts' Sean Clare celebrates scoring their third goal from the penalty spot REUTERS/Russell Cheyne 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 Hearts' Sean Clare scores their third goal from the penalty spot REUTERS/Russell Cheyne 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 Hearts' John Souttar celebrates scoring their second goal with team mates REUTERS/Russell Cheyne 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 Hearts' John Souttar scores their second goal REUTERS/Russell Cheyne 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 Hearts' John Souttar celebrates scoring their second goal REUTERS/Russell Cheyne 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 Hearts' John Souttar celebrates scoring their second goal with Uche Ikpeazu REUTERS/Russell Cheyne 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 Hearts' Uche Ikpeazu celebrates scoring their first goal with manager Craig Levein REUTERS/Russell Cheyne 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 Hearts' Uche Ikpeazu celebrates scoring their first goal with team mates Action Images via Reuters/Jason Cairnduff 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 Hearts' Uche Ikpeazu celebrates scoring their first goal with team mates REUTERS/Russell Cheyne 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 Hearts' Uche Ikpeazu celebrates scoring their first goal REUTERS/Russell Cheyne 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 Hearts' Uche Ikpeazu scores their first goal REUTERS/Russell Cheyne 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 Hearts' Zdenek Zlamal in action with Inverness' Jordan White REUTERS/Russell Cheyne 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 Hearts' Uche Ikpeazu in action with Inverness' Shaun Rooney REUTERS/Russell Cheyne 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 Inverness' Liam Polworth in action with Hearts' Bobby Burns and Jake Mulraney Action Images via Reuters/Jason Cairnduff 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 Hearts' Zdenek Zlamal in action with Inverness' Jordan White Action Images via Reuters/Jason Cairnduff 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 Hearts' Arnaud Djoum in action with Inverness' Charlie Trafford Action Images via Reuters/Jason Cairnduff 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 Inverness' Carl Tremarco receives medical attention after sustaining an injury REUTERS/Russell Cheyne 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 Hearts manager Craig Levein reacts during the match REUTERS/Russell Cheyne 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 Hearts' Christophe Berra in action with Inverness' Jordan White Action Images via Reuters/Jason Cairnduff 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 Hearts' Christophe Berra Action Images via Reuters/Jason Cairnduff 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 General view of fans inside the stadium REUTERS/Russell Cheyne 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 Inverness manager John Robertson REUTERS/Russell Cheyne 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 General view of fans inside the stadium REUTERS/Russell Cheyne 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 Inverness manager John Robertson REUTERS/Russell Cheyne 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 General view of fans inside the stadium Action Images via Reuters/Jason Cairnduff 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 Inverness manager John Robertson with Hearts manager Craig Levein before the match Action Images via Reuters/Jason Cairnduff 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 Hearts manager Craig Levein Action Images via Reuters/Jason Cairnduff 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 Inverness' Joe Chalmers in action with Hearts' Peter Haring Action Images via Reuters/Jason Cairnduff 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 Inverness' Aaron Doran in action with Hearts' Michael Smith Action Images via Reuters/Jason Cairnduff 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 Hearts' Bobby Burns in action with Inverness' Aaron Doran Action Images via Reuters/Jason Cairnduff 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 Inverness' Shaun Rooney in action with Hearts' Jake Mulraney REUTERS/Russell Cheyne 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 Hearts' Bobby Burns in action with Inverness' Aaron Doran Action Images via Reuters/Jason Cairnduff 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 Inverness manager John Robertson with Hearts manager Craig Levein before the match Action Images via Reuters/Jason Cairnduff 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 A fan before the match REUTERS/Russell Cheyne 

Soccer Football - Scottish FA Cup Semi Final - Heart of Midlothian v Inverness Caledonian Thistle - Hampden Park, Glasgow, Britain - April 13, 2019 Heart's fans before the match REUTERS/Russell Cheyne