740 BIGNONIACEAE (lUGNONIA FAMILY) 



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



Upper lip of corolla more or less spreadini; and 2-Iobed, emarginate, or entire, 

 the lower spreading, o-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-puliescent. (Name from dpofios, vetch, and dyxoi^v^ stra)i- 

 f/Ier.) Including Afiiyllon [Mitchell] Gray. 



* Flowers spicate or tht/rsoid-spirate, vn(h l-o bracts at base of calyx; corolla 



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



•*- Each flower loith o bracts (1 large and 2 small) at base of calyx. 



1. 0. PURPUREA Jacq. Stem simplp, 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. (./. A. Morton). (Adv. from Eu.) 



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

 colored; flowers yellow and pale blue; calyx 4.-l(>bcd ; corolla 1-1.5 cm. long. — 

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

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



■*- -<- Each floiver with 1 or 2 bracts at base of calyx. 



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

 with purpli.sh -tinged tlowers in a rather loose spike; calyx cleft before and 

 behind almost or quite to the base, the divisions usually 2-cleft ; corolla 1-1.0 

 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 ; flowers densely 

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

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



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



with a long curved tube and spreading o-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-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. fasciculata 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.) 



BIGNONIACEAE (Bignonia Family) 



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

 commonly ^-celled by the meeting of the tvjo 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. 



