iW BIGNONIACEAE (^BIGNONIA FAMILY; 



S. OROBAnCHE [Toum.] L. Beoom-hape 



Upper lip of corolla more or less spreading and 2-lobed, emarginate, or entire, 

 the lower spreading, 3-lobed. Stigma broadly 2-lipped or craterlform. Capsule 

 with 4 placentae, equidistant or contiguous in pairs. — Plants brownish, purplish, 

 or whitish. Flowers (blue, purple, or yellowish) and nalied or bracted stems 

 minutely glandular-pubescent. (Name from S/jojSos, vetch, and dyxit^, strati- 

 gler.) Including Aphyllon [Mitchell] Gray. 



* Flowers spicate or thyrsoid-spicate, with 1-3 bracts at base of calyx; corolla 



2-Upped, the upper lip generally 2-cleft. 



4- Each flower with 3 bracts (1 large and 2 small) at base of calyx. 



1. 0. PURPUREA Jacq. Stem simple, 1-2 dm. high, bluish- or purplish- 

 tinged; flowers deep violet; calyx b-lobed; corolla 2 cm. long, slightly bilabiate. 

 — In lawns, on Achillea, Wingham, Ont. {J. A. Morton). (Adv. from Eu.) 



2. 0. eam6sa L. Much more slender and usually freely branched, straw- 

 colored; flowers yellow and pale blue; calyx 4-lobed; corolla 1-1.5 cm. long. — 

 Parasitic on tomato. New Brunswick, N. J. {Hoisted); on hemp and tobacco, 

 111. and Ky. (Adv. from Eu.) 



1- -1- Each flovier with 1 or 2 bracts at base of calyx. 



3. 0. mInor Sm. Stem 1-3 dm. high, pubescent, pale yellowish-brown,, or 

 with purplish-tinged flowers in a ratlier loose spike; calyx cleft before and 

 behind almost or quite to the base, the divisions usually 2-cleft ; corolla 1-1.5 

 cm. long, the limb bluish, with rounded lobes, the upper lip emarginate. — 

 Parasitic on clover, N. J. to Va. (Nat. from Eu.) 



4. 0. ludoviciUna Nutt. Simple or clustered, 1-3 dm. high ; flowers densely 

 spicate or thyrsoid, purplish, bracts 1 or 2 ; calyx 6-cleft, nearly regular; corolla- 

 lobes acutish. {Aphyllon Gray.) — Sandy soil, Minn, to 111., Tex., and westw. 



* * Flowers solitary on long naked scapes or peduncles, without bracts; corolla 



with a long curved tube and spreading 5-lobed limb. 



5. 0. uniflbra L. (One-flowered Cancer-eoot.) Stem subterranean or 

 nearly so, very short, scaly, often branched, each branch sending up 1^ slender 

 1-flowered scapes 0.5-2 dm. high ; divisions of the calyx lance-awl-shaped, 

 half the length of the corolla, which is 1.5-2.5 cm. long, with 2 yellow bearded 

 folds in the throat, and obovate lobes. (Aphyllon Gray ; Thalesia Britton.) — 

 Damp woodlands, Nfd. to Va. and Tex., and westw, to the Pacific. Apr.-July. 



6. 0. fasciculkta Nutt. Scaly stem erect and rising 0.5-1 dm. out of the 

 ground, mostly longer than the crowded peduncles ; divisions of the calyx 

 triangular, very much shorter than the corolla, which has rounded short lobes. 

 (Aphyllon Gray; Thalesia Britton.) — On Artemisia, Eriogonum, etc., sandy 

 ground, L. Michigan ; Minn., southw. and westw. Apr.-Aug. (Mex.) 



BIGNONlACEAE (Bignonia Family) 



Woody plants, gamopetalous, didynamous or diandrous, with the ovary 

 commonly 2-celled by the meeting of the two parietal placentae or of a projection 

 from them, many-ovuled ; fruit a dry capsule, the large flat winged seeds with 

 a flat embryo and no albumen, the broad and leaf-like cotyledons notched at 

 both ends. Calyx 2-lipped, 5-cleft, or entire. Corolla tubular or bell-shaped, 

 6-lobed, somewhat irregular or 2-lipped, deciduous ; the lower lobe largest. 

 Stamens inserted on the corolla ; the fifth or posterior one, and sometimes the 

 shorter pair also, sterile or rudimentary ; anthers of 2 diverging cells. Ovary 

 free, bearing a long style, with a 2-lipped stigma. Leaves compound .or simple, 

 opposite, rarely alternate. Flowers large and sho^^'y. — Chiefly a tropical family, 



