Flora of the Hawaiian Islands
   Bignoniaceae -- The Bignonia Family Bibliography
      Tecoma stans

Common name(s): trumpet bush, yellowbells, yellow elder
General Information
DistributionNative from southern Arizona and southern Florida through Central America and the West Indies to northern Argentina.In the Hawaiian Islands, naturalized on O`ahu, Maui, Hawai`i.

Shrubs or small trees 2-10 m tall; branches lepidote to puberulent.
Leaves with (3-)5-7(-9) leaflets, the first pair of leaves on a new branch often simple, leaflets ovate lanceolate to elliptic or linear lanceolate, 2.4-15 cm long, 1-3 cm wide, progressively larger distally.
Flowers in terminal or subterminal racemes; calyx elongate, cup like, 0.3-7 cm long, evenly 5 toothed, the teeth ca. 1 mm long; corolla yellow with 7 reddish lines in the throat and 2 faint red lines on top of the throat ridges, 3.5-6 cm long, 1.2-2.4 cm wide at the mouth, glabrous externally, pubescent within with glandular hairs at the point of filament insertion and with a few twisted hairs in the sinus and on the throat ridges; nectary disk cupular pulvinate; ovules in 2 series per cell.
Capsules linear, nearly rounded when fresh, tapering at both ends, 7-21 cm long, 0.5-0.7 cm in diameter.
Seeds 0.3-0.5 cm long, 2.4-2.7 cm wide, winged, the wings hyaline membranous, sharply demarcated from the seed body.
2n = 36, 40.