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Spring Flora op Oklahoma 
Stamen—The organ of a flower which produces microsporangia, which 
contain the microspores which later develop into pollen grains; 
a microsporophyll. 
Staminodium—A sterile stamen, or any structure without anther 
corresponding tp a stamen. 
Staminate—Having only stamens or staminate flowers. 
Standard—The upper, usually broad petal of a papilionaceous flower. 
Stellate—Star-shaped. 
Sterile—Not producing spores or seeds. 
Stigma—The upper part of the carpel; a special organ of the Angio- 
sperms to catch the pollen grains. 
Stipe—The stalk-like support of a pistil. 
Stipel—The stipule of a leaflet. 
Stipitate—Having a stipe. 
Stipular scar—The mark made on the bark by deciduous stipules. 
Stipular spine—A spine representing a stipule or having the posi¬ 
tion of a stipule. 
Stipules—Bract-like appendages at the base of the petiole of many 
leaves. 
Stipulate—Having stipules. 
Stolon—A basal branch rooting at the nodes. 
Stoloniferous—Bearing stolons. 
Stoma (PI. stomata)—The transpiring pores in the epidermis of the 
higher plants. 
Striate—Marked with fine longitudinal lines or ridges. 
Strigose—With stiff appressed or ascending hairs. 
Style—The narrow top of the carpel or united carpels between the 
ovulary and stigma. 
Sub-acute—Somewhat acute. 
Subcordate—Somewhat heart-shaped. 
Subcoriaceous—Somewhat coriaceous. 
Submerged—Growing under water. 
Subulate—Awl-shaped. 
Succulent—Soft and juicy. 
Sulcate—With a longitudinal groove. 
Superior—Above. 
Suture—A line of dehiscence. 
Sympetalous—With petals more or less united. 
Syncarp—A fleshy aggregate fruit. 
Syngenesious—Said of stamens which are united by their anthers. 
Tendril—A slender coiling organ. 
Terete—Circular in cross section. 
Ternate—Divided into three segments; arranged in threes. 
Terrestrial—Growing on the ground, not in the water. 
Tetradynamous—With four long stamens and two short ones as in 
the cruciferae. 
