Page:First course in biology (IA firstcourseinbio00bailrich).pdf/82

 *uous stems. These so-called stemless plants die to the ground every year.

(Convolvulus arvensis).

Stems are erect when they grow straight up (Figs. 53, 54). They are trailing when they run along on the ground, as melon, wild morning-glory (Fig. 55). They are creeping when they run on the ground and take root at places, as the strawberry. They are decumbent when they lop over to the ground. They are ascending when they lie mostly or in part on the ground but stand more or less upright at their ends; example, a tomato. They are