GLOSSARY 



Sepal. One of the leaf-like organs, usually green, in the outer 

 whorl of the flower. 



Sessile. Having no stalk. 



Sheath. A thin tubular structure surrounding the stem and usually 

 a part of the leaf or at least attached near the leaf. 



Sheathing. Surrounding the stem for some distance. 



Shrub. A woody plant less than 20 ft. high usually with several 

 stems branching from near the ground. 



Silique. The pod of the Cruciferae, with two carpels. 



Silks. The styles of corn. 



Silky. Covered with soft, glossy, appressed hairs. 



Silvery. White tinged with bluish-gray and shining. 



Simple leaf. With but one blade although sometimes lobed. 



Simple stem. An unbranched stem, 



Singly. Alone, without another organ of the same kind closely 

 associated. 



Singly compound. Applied to leaves in which the leaflets are at- 

 tached directly to the petiole or rachis. 



Sinus, sinuses. The indentations in a lobed leaf; the spaces between 

 the lobes. 



Smooth. Not rough ; without hairs. 



Solid. Without cavities. 



Solitary. Without other organs of the same kind closely associated. 



Spadix, spadices. A spike, usually fleshy, enclosed or subtended by 

 a leaf-like spathe. 



Spathe. A large, leaf-like bract usually colored, enclosing or sub- 

 tending an inflorescence ; applied in the Araceae and Palmaceae. 



Spike. An inflorescence of sessile or nearly sessile flowers on a 

 single, elongated axis. 



Spikelei. A small spike as found in the grasses and sedges. 



'Spindle-shaped. Tapering toward each end. 



Spine. A sharp-pointed, woody or hardened outgrowth. 



Spiny. Having spines. 



Spiny-toothed. The teeth tipped with spines. 



Sporangium, sporangia. A case enclosing spores. 



Sporophyl. An organ which bears the sporangium. 



Spreading. Extending outward. 



Spur. A tubular appendage of a petal or sepal. 



Stalk. A lengthened support or stem of an organ or part. 



Stamen. An organ of the flower which produces pollen, located 

 between the pistil and the petals when present. 



Staminate flower. One bearing stamens but no pistils. 



Standard. The large upper petal in a flower of the Papilionaceae. 



Stem. The main axis of the plant. 



Sterile stamen. One which does not produce pollen. 



Stigma. The upper part of the pistil which receives the pollen. 



Stinging-hair. One which secretes a fluid which irritates the flesh. 



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