+Laburnocytisus adamii anagyroides" + "Chamaecytisus purpureus". +"Laburnocytisus adamii" is a legume, a member of the pea family Faboideae (or Papilionaceae, formerly Leguminosae). Only one cultivar, 'Adamii' (formally designated as +"Laburnocytisus" 'Adamii'), is known to have arisen from this graft. Most of the tree's branches resemble the laburnum in their foliage, which has three leaflets (3-palmate) and 3–6 cm long, yet also with dense clusters of broom-like shoots, also with three leaflets, but only 1 cm long and a darker green. It flowers in late spring or early summer; some branches have long (20–30 cm) racemes of yellow laburnum flowers, while others produce
Laburnum Avenue an at-grade crossing of Norfolk Southern Railway's Richmond District rail line and intersects SR 33 (Nine Mile Road) west of Highland Springs and east of the historic home Beth Elon. The highway heads north, intersecting Creighton Road, then curves west and intersects US 360 (Mechanicsville Turnpike) within East Highland Park. Laburnum Avenue crosses over CSX's Piedmont Subdivision and passes along the southern edge of Richmond International Raceway between Carolina Avenue and Richmond Henrico Turnpike. Laburnum Avenue continues west into the city of Richmond. The four-lane boulevard intersects US 1 and US 301 (Chamberlayne Avenue) within the Ginter Park Historic District.