SOLANACEAE 993 



lobes ovate, about as long as the tube : corolla 5-6 mm. long ; lobes broader than long : 

 filaments villous at the base : berries globose, 4-6 mm. in diameter. 

 In river valleys, Texas and Arizona. Spring, to fall. 



10. OESTRUM L. 



Shrubs or trees. Leaves alternate : blades entire. Cymes or clusters axillary. Calyx 

 pedicelled : tube campanulate or tubular: lobes 5, valvate. Corolla white, green or yel- 

 lowish, or rarely golden or scarlet, funnelform or salverform : tube ratlier long : lobes 5, 

 spreading. Stamens 5, included : filaments adnate to about the middle of the corolla-tube : 

 anther-sacs parallel. Ovary 2-celled, often short -stalked : stigma peltate or slightly 2-lobed. 

 Berry globose to oblong. Seeds few or sometimes solitary, smooth or nearly so. 



Calyx less than 3.5 mm. long : corolla less than 1.5 em. long. 1. c. diurnum. 



Calyx over 3.5 mm. long : corolla over 1.5 cm. long. 2. C. Parqui. 



1. Cestrum diilrnum L. Shrubby, minutely pubescent. Stems erect, 1-2.5 m. tall, 

 branching : leaf-blades oblong to oblong-lanceolate, 5-12 cm. long, acute or acutish, entire, 

 oblique at the base ; petioles 5-10 mm. long : calyx 3 mm. long ; tube campanulate ; lobes 

 broadly ovate: corolla greenish, 11-1.3 mm. long; tube, gradually dilated; lobes ovate, 

 rounded. 



In sandy soil, southern Florida and Texas. Naturalized from the West Indies. Spring to fall. 



2. Cestium Pdrqui L'Hei-. Shrubby, nearly glabrous. Stems 1-2 m. tall, branch- 

 ing : leaf-blades oblong to oblong-lanceolate, 1-2 dm. long, acute or somewhat acuminate, 

 entire ; petioles 1-1.5 cm. long : calyx 4-4.5 mm. long ; tube nearly cylindric ; lobes tri- 

 angular to triangular-ovate : corolla greenish, 2-2.5 cm. long ; tube gradually dilated ; lobes 

 broadly ovate, obtuse, 3-4 mm. long. 



In woods and waste places, Georgia and Florida to Texas. Naturalized from tropical America. 

 Spring and summer. 



11. DATURA L. 



Annual or perennial rank smelling herbs, shrubs or trees, pervaded by a narcotic 

 principle. Leaves alternate : blades various. Flowers solitary in the axils. Calyx short- 

 pedicelled : tube elongated, sometimes prismatic, spathe-like or with 5 short lobes, often 

 circumscissile near the base. Corolla white, purple or violet, funnelform : tube much sur- 

 passing the calyx : limb plaited : lobes 5, acuminate. Stamens 5, included or nearly so : 

 filaments filiform, adnate to about the middle of the corolla-tube or below it. Ovary 2- 

 celled or falsely 4-celled : stigma 2-lobed. Capsule more or less prickly, 4-valved or open- 

 ing irregularly. Thorn Apple. Jimson Weed. Jamestown Weed. Stramonium. 



Foliage glahrous or nearly so : capsules erect. 



Stems green : corolla white. 1. D. Stramonium. 



Stems purple : corolla violet or lavender. 2. D. Tatula. 



Foliage closely pubescent or downy : capsules nodding. 



Capsules armed with stout prickles which are corrugated at the base : corolla vio- 

 let without, white within. 3. D.fastuosa. 

 Capsules armed with slender prickles : corolla white or violet. 



Corolla-limb 5-lobed, usually 12-15 cm. broad. 4. D. mcteloides. 



Corolla-limb 10-lobed, usually 10 cm. broad. 5. I). Metel. 



1. Datura Stramonium L. Annual, glabrous or glabrate, the foliage green. Stems 



2-12 dm. tall, widely branching, stout : leaf-blades ovate to oblong, 1-2 dm. long, acute, 



sinuate or laciniately toothed or angled ; petioles as long as the blades or shorter : pedicels 



5-10 mm. long : calyx 3-5 cm. long ; lobes triangular or triangular-lanceolate, 5-7 mm. 



long : corolla white, 6-10 cm. long ; lobes prolonged into slender tips : capsules 4-6 cm. 



long, thickly armed with stout prickles. 



In waste places and cultivated grounds, Nova Scotia to Minnesota, Florida and Texas. Natural- 

 ized from tropical regions. Summer and fall. 



2. Datura Tatula L. Annual, glabrate, the foliage, especially the stem, purplish. 

 Stems 2-12 dm. tall, often widely branched : leaf-blades ovate or oblong, sinuately or angu- 

 lately toothed : pedicels stout, 5-15 mm. long : calyx 3-6 cm. long ; lobes triangular-lance- 

 olate, 4-7 mm. long: corolla violet or lavender, 8-11 cm. long; lobes prolonged into 

 slender tips : capsules oval or ovoid, 4-6 cm. long, closely armed with stout prickles. 



In waste places and fields, Ontario to Minnesota, Connecticut, Florida and Texas. Naturalized 

 from tropical America. Spring to fall. 



3. Datura fastuosa L. Annual, nearly glabrous. Stems erect, 1-2 m. tall, some- 

 what branched : leaf-blades ovate-lanceolate, elliptic or oval, 5-15 cm. long, acute or 



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