570 GLOSSARY 



Stigma. That part of the pistil through which pollen grains penetrate 



and effect fertilization. 



Stipe. The stalk-like support of a pistil ; the leafstalk of a fern. 

 Stipule. An appendage at the base of a leafstalk or on each side of 



its insertion. 



Stolon. A runner, or any basal branch which takes root at the nodes. 

 Striate. Marked with lengthwise lines or ridges. 

 Style. The (usually) slender and elongated part of a pistil connecting 



the ovary and stigma. 

 Succulent. Juicy and fleshy. 



Suture. The line of splitting or opening of a dehiscent fruit. 

 Ternate. Arranged in threes. 

 Tendril. Very slender, coiling organs by which some climbing plants 



cling to a support. 



Tomentose. Densely covered with wool-like hairs. 

 Truncate. Ending abruptly as if cut off squarely. 

 Tuber. A short, thickened, underground branch having numerous 



buds or " eyes." 

 Umbel. A flower cluster having all the pedicels arising froni the same 



point. 

 Unisexual. Bearing staminate and pistillate flowers on different 



plants. 



Utricle. The bladder-like covering of a one-seeded fruit. 

 Valve. One of the divisions into which a capsule splits. 

 Vein. Branching threads of fibrous tissue in leaves and other organs. 

 Viscid. Glutinous or sticky. 

 Whorl. Arranged in a circle around a stem. 



