566 SOLANACE^. (XIGHTSHADE FAMILY). 



5-cleft or parted, persistent or with a persistent base and de- 

 ciduous tube. Corolla sometimes slightly irregular. Anthers 

 2-celled. Ovules anatropous or amphitropous. Style 1, stig- 

 ma entire or bilamellate. Seeds with reticulate or pitted 

 testa. Embryo curved, spiral, or straight, in fleshy albumen 

 — Mostly narcotic and poisonous plants. 

 n Fig. 259. 



Fig. 259. (a) Flower of Nicotiana Tabacum, showing the 5-cleft calyx, tubular corolla, 

 with 5-cleft, rotate limb, 5 stamens, with 2-celIed anthers, and bilamellate stigma, {b) Cap- 

 sule of the same, with persistent calyx, the capsule splitting at tip into 5 valves, (c) The 

 same cut horizontally, showing the two cells, with central placents and many seeds, {d) 

 Section of seed of a Solanum, showing the curved embrj'o. (e) Flowering and fruiting 

 cyme of Solanum Dulcamara, showing the 5-cleft calyx, the 5-parted, rotate corolla, with 

 yery short tube, and the berry-like fruit. (/) Slightly irregular flower of Hyoscyamus- {g) 

 Capsule of the same, opening by a lid, showing the two cells, and central placenta, (h) 

 Convolute csstivation of flower of Datura. («) The same seen from above. 



* Fruit a ierry. 



1. SOLANUM. ^ Flowers in cymes or umbels, out of axils. Fruiting calyx un- 



changed. 



2. PIITSALIS. If Flowers solitarj'. Fruiting calyx much inflated, enclosing fruit. 



3. WITHANIA. ^ Flowers clustered in axils. Fruiting calyx inflated, enclosing fruit. 



4. LYCIUM. ^ Thorny shrubs. Flowers clustered in axils. Fruiting calyx unchanged. 



5. MANDEA60KA. 2f Stemless, Leaves resetted. Flowers on scapes. Fruiting calyx 



enlarged. 



* * Fruit a capsule. 



6. DATURA. Capsule large, prickly, not included in calyx. 



7. HYOSCYAMUS. 2f Capsule not prickly, included in calyx. Corolla oblique. 



1. SOLiAXfJIH, Tourn. Nightshade. 



Calyx campanulate or spreading, 5-tootlied or -parted, not grow- 

 ing in fruit. Corolla rotate, with a very short tube, 5-lobed. Filaments 



