266 BIGNONIACEAE. 



FAMILY 13. OROBANCHACEAE. BROOM-RAPE FAMILY. 



Parasitic, commonly perennial herbs, without green coloring matter. 

 Leaves alternate, scale-like. Flowers perfect, or rarely dioecious, sometimes 

 cleistogamous and complete on the same plant. Calyx of 4 or 5 partly 

 united sepals, sometimes spathe-like. Corolla of 4 or 5 partially united 

 petals, the limb irregular or 2-lipped. Androecium of 4 didynamous 

 stamens partially adnate to the corolla. Gynoecium of 2, or rarely of 3, 

 united carpels. Ovary 1-celled. Ovules mostly numerous. Fruit a cap- 

 sule. Seeds wingless. 



Flowers perfect and complete throughout. 



Calyx irregular, spathe-like, the lower side split, the upper with 3 or 4 tooth- 

 like lobes : stamens exserted. 1. CONOPHOLIS. 

 Calyx regular or nearly so, with 2-5 equal or unequal lobes : 



stamens included. 2. THALESIA. 



Flowers various, cleistogamous on lower part of spike, complete 



but mostly sterile above. 3. LEPTAMNIUM. 



1. CONOPHOLIS Wallr. Yellow or brownish herbs, with very stout 

 stems and inflorescence. Leaves numerous. Flowers sessile, yellowish, crowded 

 in the spike. 



1. C. americana (L. f.) Wallr. Plants clustered, 1-2 dm. tall: leaves (scales) 

 ovate to lanceolate, 10-12 mm. long: calyx 7-9 mm. long, erose-toothed : co- 

 rolla yellowish or pale-yellow, 10-12 mm. long: capsules ovoid, 10-15 mm. long. 

 Eather common, in rich woods. Spr. SQUAW-ROOT. CANCER-ROOT. 



2. THALESIA Eaf. Pale or pink herbs, with short, mostly subterranean 

 stems. Leaves few. Flowers solitary on long pedicels, often more deeply 

 colored than the foliage. 



1. T. uniflora (L.) Britton. Plants 5-16 cm. tall: leaves (scales) ovate to 

 obovate, 5-10 mm. long: calyx 4-11 mm. long; lobes lanceolate, about as long 

 as the tube: corolla cream-colored and purple-tinged, 14-18 mm. long; lobes 

 oblong to obovate : capsules conic-ovoid, about 10 mm. long. Eather com- 

 mon, in rich woods. Spr. BROOM-RAPE. CANCER-ROOT. 



3. LEPTAMNIUM Eaf. Dark-purplish or yellowish-brown herbs, with 

 branching stems. Leaves very few. Flowers racemose or paniculate, paler 

 than the stem, separated. 



1. L. virginianum (L.) Eaf. Plants 1-4 dm. tall: leaves (scales) few at the 

 base of the plant: complete flowers larger than the cleistogamous ones: calyx 

 2.5-3 mm. long; lobes triangular to ovate-triangular, shorter than the tube: 

 corolla 10-13 mm. long; upper lip notched; lobes of the lower lip acute: 

 capsules 3-5 mm. long. Common, under beech trees. Spr. BEECH-DROPS. 

 CANCER-ROOT. 



FAMILY 14. BIGNONIACEAE. TRUMPET-CREEPER FAMILY. 



Shrubs, trees, woody vines, or rarely herbs. Leaves opposite, rarely 

 alternate or whorled, often tendril-bearing: blades simple or pinnately 

 compound. Flowers perfect, usually showy. Calyx of usually 2 more or 

 less united sepals. Corolla 5-lobed, irregular, or 2-lipped. Androecium of 

 5 stamens with 1 or 3 of them reduced to staminodia, or of 4 didynamous 

 stamens. Anthers with mostly divaricate sacs. Gynoecium of 2 united 

 carpels. Ovary 1-celled, or 2-celled by the meeting of the placentae. 

 Ovules numerous. Fruit a capsule. Seeds winged or appendaged. 



Corolla highly colored : leaf -blades compound : vines or rarely herbaceous plants. 



1. BIGNONIA. 

 Corolla white and somewhat spotted : leaf-blades simple : trees. 2. CATALPA. 



