352 gentianacejs. (gentian family.) 



6. DATURA, L. Jamestown-Weed. Thorn-Apple. 



Calyx tubular, terete or angled, 5-cleft, separating near the base, the upper 

 portion deciduous. Corolla funnel-shaped ; the limb plaited, 5-lobed, convolute 

 in the bud. Stamens 5 . anthers opening lengthwise. Capsule spiny, imper- 

 fectly 4-celled, 4-valved, many-seeded. — Strong-scented poisonous herbs, with 

 pctioled oblong or ovate mostly toothed leaves, and large solitary Mowers in the 

 forks of the branches. 



1 . D. Stramonium, L. Smooth ; stem stout, forking ; leaves ovate or 

 oblong-ovate, acute, sinuate-toothed ; corolla sharply 5-toothed, white, twice as 

 long as the 5-angled calyx; capsule erect. — Var. Tatula. Larger; leaves 

 often cordate ; stem and corolla purplish. — Waste ground, very common. 

 June - Oct. — Stem 1 ° - 3° high. Leaves 4' - 8' long. Corolla 3' - 4' long 



2. D. Metel, L. Pubescent ; stem stout, branching ; leaves ovate, entire 

 or slightly toothed ; corolla white, 10-toothed; calyx loose, terete; capsule nod- 

 ding. — North and South Carolina, Curtis. Introduced. — Stems 3° -4° high. 



The Petunia, Night-Bi.ooming Jessamine (Cestrum), and Tobacco 

 (Nicotiana), belong to this family. 



Order 101. GENTIANACEiE. (Gentian Family.) 



Chiefly smooth and bitter herbs, -with colorless juice, opposite entire 

 partly sheathing exstipulate leaves, and regular often showy flowers. — 

 Calyx 4-1 2-parted, or 4 - 1 2-cleft. Corolla 4-1 2-lobed, convolute, rarely 

 valvate or imbricated, in the bud, hypogynous. Stamens alternate with 

 the lobes of the corolla, and inserted on its tube : anthers 2-celled. Ovary 

 single, with numerous anatropous ovules. Stigmas 1-2. Capsule 1- 

 cclletl, or imperfectly 2-4-celled by the introversion of the margins' of the 

 valves, septicidally 2-valved. Placenta? parietal. Seeds numerous. Em- 

 bryo minute, in the axis of fleshy albumen. 



Synopsis. 



« Corolla convolute, or (in Obolaria) imbricated in the bud. Testa membranaceous. — Leaves 



M'ssile. 

 1. BABBATIA. Stylo conspicuous, deciduous. Stigmas linear, twisted. Corolla wheel- 



ahaped, .')- 12 -parted. 

 1. 1.1 STOMA. Btyla conspicuous persistent. Stigmas roundish, Hat. Corolla tubular, 4- 



6 parted. 

 ... QBNTIANA. Stigmas sessile, flat, pcr.»istent. Corolla bell-shaped or funnel-form, 4-6- . 



lobed, mostly with plaited appendages between the lobes. 

 •1. BARTONIA. Calyx and corolla 4-lebed. Stigmas eeae&a Leaves s.ale-like. 

 ;>. OBOL LRIA. Calj x 2-leaved Corolla 4-lobed, Imbricated in the bod. 

 ■>. 11; L8EB \. Corolla wheal Shaped, 4-parted, the lobes with a large depressed gland in the 



middle. 



* # Corolla folded in the bud. Testa woody. Petioles elonirateL 

 7. LIMN A NTH EM I'M Loa\cs lloating, cordate. Flowers clustered on the petiole 





