LYCIUM 185 



1. L. halimifolium Mill. Matrimony- Vine. Shrub with lithe 

 runners, up to 3 m. long, recurved-drooping, sometimes spar- 

 ingly if at all spiny; twigs pale gray, not hairy. Introduced from 

 Europe and spread from cultivation (Fig. 286). 



PAULOWNIA Sieb. and Zucc. (Scrophulariaceae) 



Medium-sized deciduous trees. Twigs thick, compressed at 

 the nodes; pith large, white, round, chambered or excavated be- 

 tween the nodes. Buds often superposed, sessile, hemispheric, 

 with about 4 scales; terminal bud lacking. Leaf-scars opposite, 

 large, nearly elliptic; bundle-traces numerous, in a nearly closed 

 ellipse; stipule- scars none. Fruit an ovoid beaked capsule, re- 

 maining on the trees into the winter, after the seeds have been 

 shed. By some authorities placed in the Bignoniaceae, 



1. P. tomentosa (Thunb. ) Steud. Imperial Tree . Tree reach- 

 ing a height of 15 m. and a diameter of 1 m, ; bark thin, flaky; 

 branches thick, spreading; twigs soft-pubescent when young, be- 

 coming glabrous; capsules 3-4 cm. long, woody. Introduced from 

 Asia, spread from cultivation and extensively naturalized (Fig. 

 287 ). 



CAMPSIS Lour. (Bignoniaceae) 



Straggling deciduous shrubs, usually climbing, often by aerial 

 roots. Twigs moderate, warty; pith pale, continuous, or excavated 

 at the nodes. Buds small, solitary, sessile, triangular, compressed, 

 with 2 or 3 pairs of visible scales. Leaf-scars opposite, shield- 

 shaped; bundle-trace 1, crescent-shaped, compound; stipule-scars 

 none but leaf-scars connected by hairy ridges. Tecoma Juss. 



1. C. radicans (L. ) Seem. Trumpet Creeper . Climbing or 

 trailing, to 10 m. or more; aerial roots abundant, in two rows; 

 twigs puberulent or scabrous; capsule elongated, flattened, 8-12 

 cm. long. Thickets, Florida to Texas, north to New Jersey, West 

 Virginia, and Iowa; naturalized northwards, an aggressive weed 

 southwards (Fig. 288 ). 



BIGNONIA L. - (Bignoniaceae) 



Soft-wooded deciduous or partly evergreen climbers. Stems 

 rounded or somewhat fluted, slender; pith pale, porous, finally 

 excavated. Buds moderate, solitary, sessile, oblong. Leaf-scars 

 opposite, triangular; bundle-trace 1, U-shaped; stipule-scars 

 none, but leaf-scars connected by transverse ridges. The leaves, 

 composed of 2 leaflets and a branched tendril, sometimes do not 



