SOLANE.E. BORAGIXEJ:. 62, 



results arc tlicrcforc Tinknown to tlio liurdoned smoker, which are so distressing 

 to the novice. In the potato the tubers are the only edible part of the plant, as the 

 leaves and fruit contain a narcotic alkaloid, Solanine. Other species contain powerful 

 alkaloids used in pharmacy. Atropa belhidonna yields Atropine, used in asthma, 

 rheumatism and neuralgia, and also (from its rausinp; dilatation of the pu])il) in many 

 diseases of the eye. The same plant yields also another alkaloid, liclladonnine. 

 Henbane {ITi/osct/nmiin niffcr) is another valuable plant in medicine, its powers depending 

 on the presence of the alkaloid IIijnxcijiDiiiic ; and lastly several species of Datura 

 (1). stramonium, I), tatula and B. mete!) yield an alkaloid, Daturine, and are all 

 extremely efficacious in asthma, and some other eom])laints. 



POLEMONIALES. 

 Corolla hypogynous, monopetalous, regular, /^tumens as many as the corolla- 

 lobes, and inserted on the tube. Filaments usually exserted. Ovary 1- to 5-ceUed, 

 syncarpous (except Dirliondrat and lYolanece). Cells 1- to 2-, very rarely many- 

 ovuled. Embryo albuminous. Leaves alternate or none, exstipulate. Herbs, rarely 

 shrubby below. 



Order BOKAGIIS'EiE. 



Flowers usually hermaphi-odite, regular, or nearly so. 0////.r free, 5- (rarely 

 4- or 6-)cl('ft or toothed, or rarely irregularly slit. Corolla salver-shaped, with a 

 longer or shorter tube, 5- (rarely 4- or 6-)lobed, imbricate or indnplicate in bud. 

 Stiimeiis as many as corolla-lobes, and alternating with them, or very rarely fewer, 

 inserted in the corolla-tube. Anthers 2-celled, dehiscing longitudinally, or rarely 

 with apical pores. Ocary superior, entire or 4-lobed, either 4-celled, with a solitary 

 ovule in each cell, or 2-celled and the cells 2-ovuled (in both cases the ovary 

 consists of 2 carpels only), the ovules laterally attached, ascending or pendulous. 

 Style terminal or between the lobes. Fruit either a drupe, with the endocarp 

 entire, or separating into 2 or 4 pyrenes, or dry, and separating into 4 or 

 rarely 2 nuts. Albumen none or scanty. Embryo straight, with flat and rather 

 thick or rarely folded cotyledons, the radicle short. Herbs or perennials usually 

 rough, from coarse hairs, or shrubs and trees, which are glabrous, or with a softer 

 investment, with alteniatiug or very rarely opposite leaves, simple, or very rarely 

 deeply lobed. Flowers in 1 -sided spikes or racemes, circinnately rolled back when 

 young, and often forked or dichotomous, or rarely in irregularly branched panicles 

 or solitary. L'raets and bractlets often wanting. 



Ocary of two 2-celled or 2-partite carpels. Style ventral or basal. Fruit 2-i-partite. 

 Albumen none. 



TuicnoDESJiA, Brown. 



T. Indicum, Br. (M.). 



T. PEUFOLIATUM, AVall. (M.). 



irELrOTJiOFIE.'E. 

 Ovary sereral-celled. Style terminal, simple. Fruit dry, entire, or separating 

 into cocci. Albumen scanty or none. Cotyledons Jlat. 



n KLioTRon r .M , Tournef. 



* H. Pkruviantm, L. (M.). 

 H. liUEviFoLiuJi, Wall. (M.). 



ERRETIESE. 



Ovary undivided. Style terminal, 2-lobcd. Fruit indehiseent, '{-seeded. Albumen 

 none. Cotyledons Jlat. 



