OROBANCHACE^E. 257 



6. HYOSCYAMUS. Linn. Henbane. 



(From the Greek is, i>os, a hog, and KVU^OS, a bean ; because hogs are said to 

 eat without injury the fruit, which bears some resemblance to a bean.) 



Calyx tubular, 5 -cleft. Corolla funnel-form, irregular, lobes 

 obtuse. Stamens 5, declined. Stigma capitate. Capsule 

 ovoid, opening with a lid. 



H. niger Linn. : stem erect, very leafy ; leaves sinuate and angularly 

 toothed, clasping; flowers sessile, arranged in terminal recurved leafy 

 spikes ; corolla reticulate. 



Waste places. N. Y. and Penn. June. (I) or (g). Plant covered with 

 unctuous fetid hairs. Stem 12 18 inches high, much branched. Leaves ob- 

 long, acute. Flowers large, dull yellow, with purple veins. A powerful narcotic. 

 Introduced from Europe. Common Henbane. 



ORDER XCI. OROBANCHACE^E. BROOMRAPES. 



Calyx divided, persistent. Corolla irregular, persistent, with 

 an imbricate aestivation. Stamens 4, didynamous. Ovary 

 superior, 1-celled, seated in a fleshy disk, with 2 or more pari- 

 etal placentae ; style 1 ; stigma 2-lobed. Fruit a capsule, en- 

 closed within the withered corolla. Seeds numerous, very mi- 

 nute. Herbaceous leafless parasites. Stem covered with brown 

 or colorless scales. 



1. OROBANCHE. Linn. Broom Rape. 



(From the Greek cpo/los, a. pea-like plant, and ay^cjj/, to strangle; from its sup- 

 posed injurious eflect.) 



Flowers perfect. Calyx 2 5-cleft, segments often unequal. 

 Corolla tubular, the limb somewhat ringent ; upper lip entire 

 or 2-lobed, the lower 3-lobed. Stamens 4, didynamous. Stig- 

 ma mostly 2-lobed. Capsule ovoid, 2-valved, many-seeded. 



1. O. Americana Linn.: stem clothed with ovate-lanceolate imbricate 

 scales ; spike terminal, smooth ; corolla slightly curved ; stamens exserted. 



Shady woods. Can. to Geor. June. 1\. Plant 6 8 inches high, mostly 

 growing in clusters. Flovxrs sessile, with lanceolate bracts at the base, dirty 

 white or pale brown. Syuaw-root. 



2. O. uniflora Linn. : stem very short, often branched at base, clothed 

 with oblong scales ; flowers solitary, on scape-like pubescent peduncles ; 

 calyx equally 5-cleft ; lobes of the corolla oblong-oval, with a pubescent 

 colored margin ; stamens included, smooth. 



Woods. Can. to Car. W. to Miss. May, June. 11-. Plant 46 inches* 

 high, brownish-yellow. Peduncles 25 inches long, mostly 2 or 3 on each 

 short stem. Flowers incurved, pale purple. One-flowered Broom-rape, 



