BIGNONIACEAE. 851 



Annular or cup-like. Ovary mostly 2-celled ; placentae parietal, or on 

 the partition-wall of the ovary ; ovules numerous, horizontal, anatropous; 

 style slender ; stigma terminal, 2-lobed. Capsule 2-valved. Seeds flat, 

 transverse, winged in our genera; endosperm none; cotyledons' broad 

 and flat, emarginate or 2-lobed ; radicle short, straight. About 60 gen- 

 era and 500 species of wide distribution in tropical regions, a few in the 

 temperate zones. 



Leaves compound; anther-bearing stamens 4; our species vines. 



Calyx-limb undulate; capsule flattened parallel with its partition-wall. 



1. Bignonia. 

 Calyx 5-toothed ; capsule compressed at right angles to its partition-wall. 



2. Tecoma. 

 Leaves simple; anther-bearing stamens mostly 2; trees. 3. Catalpa, 



1. BIGNONIA L. 



Woody vines, with opposite 2-3-foliolate leaves, the terminal leaflet usually 

 reduced to a tendril (some tropical species with decompound or even simple leaves), 

 and large flowers. Calyx campanulate, the limb undulate, truncate or slightly 

 5-toothed. Tube of the corolla much expanded above the calyx, the limb some- 

 what 2-lipped, 5-lobed, the lobes rounded. Anther-bearing stamens 4, didynamous, 

 included-; anther-sacs glabrous, divergent. Capsule linear, septifragally dehiscent, 

 the margins of the valves more or less thickened. Seeds in I or 2 rows on both 

 margins of the partition, winged, much broader than high, the wing entire, or 

 erose at the end. [Named after the Abbe Bignon, 1662-1743, librarian to Louis 

 XV.] About 150 species, natives of America. The following is the only one 

 known in the U. S. 



i. Bignonia crucigera L. TENDRILLED TRUMPET-FLOWER. CROSS VINE. 

 (I."F. f. 3365.) Glabrous, climbing, the stems sometimes I dm. in diameter, exhib- 

 iting a cross in the transverse section. Leaves petioled, commonly with small 

 simple stipule like ones in their axils, 2-foliolate, terminated by a branched tendril; 

 leaflets stalked, oblong or ovate, entire, acute or acuminate at the apex, cordate at 

 the base, 7-17 cm. long; cymes numerous, short- peduncled, 2-5-flowered; pedi- 

 cels 2-5 cm. long; calyx membranous; corolla 5 cm. long, orange and puberulent 

 without, yellow within; capsule 13-17 cm. long, very flat, each valve longitudinally 

 I -nerved; seeds broadly winged laterally, narrowly winged above and below. In 

 moist woods, Va. to Fla., La., Ohio and 111. April-June. 



2. TECOMA Juss. 



Climbing woody vines with aerial rootlets, or erect shrubs, with opposite pin- 

 nately compound or sometimes simple leaves, and large red or orange flowers, in 

 terminal corymbs, racemes, or panicles. Calyx tubular-campanulate, unequally 

 5 toothed. Corolla-tube elongated, enlarged above the calyx, narrowly campanu- 

 late, the limb slightly 2-lipped, 5-lobed, the lobes spreading. Anther-bearing 

 stamens 4, didynamous, ascending under the upper lip; anther-sacs divergent, 

 glabrous or slightly pubescent. Capsule elongated, loculicidally and septicidally 

 dehiscent. Seeds in i, 2 or several rows on each side of the margins of the parti- 

 tion, winged, the wing translucent. [From the Aztec name Tecomaxochitl.] 

 About 80 species, of warm and temperate regions. Besides the following, another 

 occurs in the southern U. S. 



i. Tacoma radicans (L.) DC. TRUMPET-FLOWER. TRUMPET-CREEPER. 

 (I. F. f, 3366.) Leaves petioled, odd-pinnate, not tendril-bearing, 2-4 dm. long; 

 leaflets 7-11, ovate to lanceolate, short-stalked, sharply serrate, reticulate-veined, 

 glabrous, or pubescent on the veins beneath, acute or acuminate, 3-7 cm. long; 

 flowers corymbose, short-pedicelled ; corymbs 2-g-flowered ; calyx coriaceous, 

 about 2.5 cm. long; corolla scarlet, 6-7 cm. long, the tube veined within, 3 times 

 as long as the limb; anther-sacs glabrous ; stigma spatulate; capsule stalked, 10-15 

 cm. long, 2 cm. in diameter, narrowed at both ends, little flattened, ridged above 

 and below by the margins of the valves; seeds in several rows on each surface of 

 the partition, broadly winged laterally, the wing eroded. In moist woods an.4 



