Editing Catalpa (section)

==Species==

The two North American species, ''[[Catalpa bignonioides]]'' (southern catalpa) and ''[[Catalpa speciosa]]'' (northern catalpa), have been widely planted outside their natural ranges as [[ornamental plant|ornamental trees]] for their showy flowers and attractive shape. Northern and southern catalpas are very similar in appearance, but the northern species has slightly larger leaves, flowers, and bean pods. Flowering starts after 275 [[growing degree day]]s. ''[[Catalpa ovata]]'' from China, with pale yellow flowers, is also planted outside its natural range for ornamental purposes. This allowed ''C. bignonioides'' and ''C. ovata'' to hybridize, with the resultant ''[[Catalpa × erubescens]]'' also becoming a cultivated ornamental.

=== List of species ===
'''Sources:''' (GRIN accepts 8 species)<ref name=grin>{{cite web |url=https://npgsweb.ars-grin.gov/gringlobal/taxonomybrowse |title='''Species Records of ''Catalpa''''' |department=[[Agricultural Research Service]] (ARS), [[National Genetic Resources Program]], [[Germplasm Resources Information Network]] (GRIN) |publisher=[[United States Department of Agriculture|USDA]] |access-date=12 April 2021 }}</ref> (KEW accepts 8 species)<ref>{{cite web |title=Catalpa Scop. {{!}} Plants of the World Online {{!}} Kew Science |url=https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:30022327-2 |website=Plants of the World Online |access-date=12 April 2021 |language=en}}</ref>
* Section ''Catalpa'' (North America and East Asia):
** ''[[Catalpa bignonioides]]'' {{small|Walter}} – southern catalpa
** ''[[Catalpa bungei]]'' {{small|C.A.Mey.}} – Manchurian catalpa
** ''[[Catalpa fargesii]]'' {{small|Bureau}} (sometimes treated as a synonym of ''C. bungei'')
** ''[[Catalpa ovata]]'' {{small|G.Don}} – Chinese catalpa, yellow catalpa
** ''[[Catalpa speciosa]]'' {{small|Warder ex Engelm.}} – northern catalpa
* Section ''Macrocatalpa'' (Caribbean):
** ''[[Catalpa brevipes]]'' {{small|Urb.}}
** ''[[Catalpa purpurea]]'' <small>Griseb</small>
** ''[[Catalpa macrocarpa]]'' <small>Ekman</small>
** ''[[Catalpa longissima]]'' <small>(Jacq.) Dum.Cours</small>