loz Bulletin of the Unversity of Texas 
Scale. A minute leaf. 
Sepal. One of the parts of the calyx. 
Serrate. With teeth like a saw. 
Sessile. Without a stalk. 
Sheath. A tubular or enrolled part or organ. 
Simple. Of one part. 
Sinus. The opening between the lobes of a leaf. 
Spatulate. Spoon shaped. 
Species. A group of individuals which are more like each other than 
they are like any other group. 
Spike. An elongated axis which bears sessile flowers. 
Spine. A sharp woody outgrowth from the stem. 
Stamen. The organ of the flower which bears the pollen. 
Staminate. With stamens but without pistils. 
Stigma.- The tip of the pistil. i 
Stipules. A pair of leaf like organs at the insertion of the petiole. ~ |, 
Stomate. A breathing pore in the leaf. 
Style. The filamentous portion of the pistil. 
Teeth. Projections from the leaf margin. 
Thorn. A reduced, sharp pointed branch. 
Tomentum. A dense layer of hairs. 
Trifoliate. With three leaves. 
Truncate. Cut off squarely. 
Umbel. <A flower cluster in which all the pedicels arise from the same 
point. 
Whorl. <A group of three or more leaves or branches radiating from the 
point of attachment. 
th yf 
