200 FOUNDATIONS OF BOTANY 



acute at the apex, abruptly contracted to the short petiole, prickly 

 on the veins. Racemes lateral, few-flowered ; pedicels recurved in 

 fruit. Calyx-lobes taper-pointed. Corolla deeply angular-lobed, 

 blue or white ; berry globose, smooth, yellow. A common weed.* 



4. S. rostratum, Dunal. SAND BUR, BUFFALO BUR. Annual; 

 the whole plant beset with yellow prickles ; stem erect, diff usely 

 branched, 1-2 ft. high. Leaves broadly oval or ovate in outline, 

 deeply pinnately lobed or parted, petioled, downy, with star-shaped 

 hairs. Racemes few-flowered ; pedicels erect in fruit. Calyx very 

 prickly, becoming enlarged and enclosing the fruit. Corolla bright 

 yellow, 5-angled, about 1 in. broad. Introduced from the West, 

 and becoming a troublesome weed in some places.* 



5. S. tuberosum, L. IRISH POTATO. Annual; stem diffusely 

 branched, downy, underground branches numerous and tuber-bearing. 

 Leaves irregularly pinnatifid and divided. Flowers in cymose clus- 

 ters, white or purple, with prominent yellow anthers ; pedicels 

 jointed. Corolla 5-angled, |-1 in. broad. Fruit a globose, greenish- 

 yellow, many-seeded berry, about in. in diameter. Cultivated from 

 Chili* 



HI. LYCOPERSICUM, Tourn. 



Annual ; stem diffusely branched. Leaves pinnately divided. 

 Flowers in raceme-like clusters on peduncles opposite the 

 leaves. Calyx 5-many-parted, persistent. Corolla wheel- 

 shaped, 5-6-parted. Stamens 5-6, inserted in the short tube 

 of the corolla, filaments short, anthers elongated. Ovary 

 2-several-celled, style and stigma simple. Fruit a many- 

 seeded berry.* 



1. L. esculentum, Mill. TOMATO. Stem diffusely branched, at 

 length leaning over, furrowed and angled below, sticky-hairy, 3-5 

 ft. long. Leaves irregularly lobed and pinnatifid, petioled. Calyx- 

 lobes linear, about as long as the yellow corolla. Fruit (in the wild 

 state) globose or ovoid, red or yellow, - in. in diameter, but greatly 

 enlarged in cultivation. Common in cultivation from tropical 

 America.* 



IV. DATURA, L. 



Annual or perennial, strong-scented herbs ; stems tall and 

 branching. Leaves petioled, entire or lobed. Flowers large, soli- 

 tary in the forks of the branches. Calyx tubular, 5-toothed 

 or lobed, the upper part deciduous and the lower persistent. 

 Corolla funnel-form, 5-angled. Stamens 5, inserted in the 



