382 VARIOUS PLANT GROUPS 



another but from the partitions within, the sutures coming 

 at the margin of the partitions. Dehiscence of this type is 

 termed marginicidally septifragal. ' 



The family is a small one made up mostly of round-stemmed 

 herbaceous vines, with more or less milky juice; alternate, ex- 

 stipidate leaves; regular flowers having a gamopetalous corolla, 

 plicate-convolute in the hud, and having usually adherent 

 stamens, the ovary being two to five-celled; and with the fruit, 

 commonly a capsule, containing a few large albuminous seeds 

 with folded embryo. 



133. The nightshade family (Solanaceae). Examples: 

 white potato (Figs. 58 I-III, pages 59, 60), tomato (Figs. 

 88, 89, pages 83, 84), egg-plant (Fig. 90, page 85), red pepper 

 (Figs. 125 I, II, 126, pages 131, 132), tobacco (Fig. 173, 

 page 184), belladonna (Fig. 175, page 187), and jimson-weed 

 (Figs. 1871, II, page 200). 



No new signs appear in the formulas of Nicotiana. Datura, 

 Atropa, Capsicum, Solanum, and Solanacese on pages 416, 417. 



This large family may be distinguished as consisting of 

 mostly rank-scented, round-stemmed, herbaceous plants, with 

 watery sap; leaves alternate, exstipulate; flowers regular or 

 nearly so; the corolla gamopetalous, plicate-convolute, or plicate- 

 valvate; ovary two-celled; fruit a capsule or berry containing 

 many small albuminous seeds with the embryo coiled. 



134. The figwort family (Scrophulariaceae) is exemplified 

 by the foxglove (Fig. 192, page 204). 



See the formulas of Digitalis and Scrophulariacea^ on pages 416, 

 417. 



Round or square-stemmed, herbaceous or woody plants not 

 strongly scented; the juice watery and often bitter; leaves alter- 

 nate, opposite or verticillate, exstipulate; flowers irregular; 

 corolla gamopetalous, imbricate in aestivation; stamens two to 

 five, mostly four ; ovary two-celled ; fruit a septicidal or loculicidal 

 capsule, containing many small albuminous seeds with the 

 embryo uncoiled. 



1 Sep-tif'ra-gal < L. septutn, partition; /ranjere, break. Cj -p. 



