Question: Which of the following is native to woodland and scrub from southeastern Europe: Syringa or Tiarella?

Context paragraphs:
Syringa: Syringa (lilac) is a genus of 12 currently recognized species of flowering woody plants in the olive family (Oleaceae), native to woodland and scrub from southeastern Europe to eastern Asia, and widely and commonly cultivated in temperate areas elsewhere.

Tiarella: Tiarella, foamflower, is a genus of wildflower and garden plants found in Asia and North America.  They belong to the Saxifrage family (Saxifragaceae).  Some species are:

Slavs: Slavs are the largest Indo-European ethno-linguistic group in Europe.  They are native to Central Europe, Eastern Europe, Southeastern Europe, Northeastern Europe, North Asia, Central Asia and West Asia.  Slavs speak Slavic languages of the Balto-Slavic language group.  From the early 6th century they spread to inhabit most of Central, Eastern and Southeastern Europe.

Woodhouse's scrub jay: Woodhouse's scrub jay ("Aphelocoma woodhouseii"), is a species of scrub jay native to western North America.  It ranges from southeastern Oregon and southern Idaho to central Mexico.  It comprises two distinct subspecies groups.  They are Woodhouse's scrub jay (interior US and northern Mexico), and Sumichrast's scrub jay (interior southern Mexico).  Woodhouse's scrub jay was once lumped with the California scrub jay and the island scrub jay and collectively called the western scrub jay.  It was also lumped with the Florida scrub jay; the taxon was then called, simply, the scrub jay.  Woodhouse's scrub jay is nonmigratory and can be found in urban areas, where it can become tame and will come to bird feeders.  While many refer to scrub jays as "blue jays", the blue jay is a different species of bird entirely.

Syringa × laciniata: Syringa × laciniata, the cut-leaf lilac or cutleaf lilac, is a hybrid lilac of unknown, though old origin.  It is thought to be a hybrid between "Syringa vulgaris" from southeastern Europe and "Syringa protolaciniata" from western China.  Although often cited as being from China, it more likely arose somewhere in southwestern Asia, where it was first scientifically described from cultivated plants in the 17th century, possibly Iran or Afghanistan, or Pakistan, where it has been cultivated since ancient times.

History of Thessaloniki: The history of the city of Thessaloniki is a long one, dating back to the Ancient Greeks.  Today with the opening of borders in Southeastern Europe it is currently experiencing a strong revival, serving as the prime port for the northern Greek regions of Macedonia and Thrace, as well as for the whole of Southeastern Europe.

Syringa reticulata subsp. pekinensis: Syringa reticulata subsp.  pekinensis (formerly known as "Syringa pekinensis") also called Pekin Lilac or Chinese tree lilac grows in an open, multi-stemmed form to a height of 15 to , with a spread of 10 to .  They are native to northern China but grow in USDA hardiness zones 3 through 7. It is grown as an ornamental tree in Europe and North America.

Victor Spinei: Victor Spinei (26 October 1943, Lozova, Lăpușna County, Romania) is Emeritus Professor of history and archaeology at the Alexandru Ioan Cuza University, member and Vicepresident of the Romanian Academy.  He is a specialist on the history of Romania and the Romanian people in the Early and High Middle Ages, the history of migratory peoples in Eastern and Southeastern Europe during this period, and the production and circulation of cult objects in Eastern and Southeastern Europe during the Middle Ages.

Balkan Black Box Festival: Balkan Black Box is the only festival of culture and art in Germany which focusses on Southeastern Europe.  It was established in 1999, and since then it is organised annually in Berlin.  For the time of one week Balkan Black Box is presenting films, exhibitions, literature, theatre, music and discussions from and about Southeastern Europe.

Southeast Europe: Southeast Europe or Southeastern Europe is a geographical region of Europe, consisting primarily of the coterminous Balkan peninsula.  There are many overlapping and conflicting definitions as to where exactly Southeastern Europe begins or ends or how it relates to other regions of the continent.  Sovereign states that are most frequently included in the region are, in alphabetical order: Albania, Bosnia and Herzegovina, Bulgaria, Croatia, Greece, Kosovo, Macedonia, Montenegro, Romania, Serbia, and Slovenia.

Supporting paragraphs: Syringa Tiarella
Answer: Syringa