740 BIGNONIACEAE (^BIGNONIA FAMILY^ 



3. OROBANCHE [Tourn.] L. Broom-rape 



Tipper lip of corolla more or less spreadin^c: and 2-lobed, emarginate, or entire, 

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

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

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

 minutely glandular-pubescent. (Name from 6po^os, vetch, and dyx^^V, strah- 

 gler.) Including Aphyllon [Mitchell] Gray. 



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



2-lipped, the upper lip generally 2-cleJt, 

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



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

 tinned; floicers 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. RAMOSA L. JNIuch more slender and usually freely branched, straw- 

 colored; Howers yellow and pale blue ; calyx 4-lobed ; corolla 1-1.6 cm. long. — 

 Parasitic 'on tomato. New Brunswick, N. J. (^Halsted); on hemp and tobacco, 

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



■»- -t- Each flower with 1 or 2 bracts at base of calyx. 



3. 0. MINOR Sin. Stem 1-3 dm. high, pubescent, pale yellowish-brown, or 

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

 behind ctlmost 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. ludoviciana Nutt. Simple or clustered, 1-3 dm. high ; floorers densely 

 spicate or thyrsoid, purplish, bracts 1 or 2 ; calyx ^^-deft, 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 b-lobed limb. 



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

 nearly so, very short, scaly, often branched, each branch sending up 1-4 slender 

 1-flnwered 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. 



G. 0. fasciculata Nutt. Scaly stem erect and rising 0.5-1 dm. out of the 

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

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

 {Aphyllon Gray; Thalesia Britton.) —< >n Artemisia, Eriogonum, etc., sajidy 

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



BIGNONIACEAE (Bignonia Family) 



Woody - plants, gamopetalous, didynainous 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, 

 5-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 showy. — Chiefly a tropical family. 



