186 Proceediit^o^s of tlie OJiio State Academy of Science 



Repand: With a more or less \vav3- margin. 

 Retuse. Witli a shallow notch at the end. 

 Revolute. Rolled backward. 

 Rotate. With a flat round corolla ; wheel-shaped. 



Sagittate. Shaped like an arrow head. 



Samara. A simple indehiscent winged fruit. 



Scabrous. Rough. 



Scale. A highly modified dry leaf as in the winter bud of most plants ; 



also a dry, flat, more or less membranous outgrowth from a 



leaf or stem. 

 Scurfy. Covered with scurf, minute membranous scales, as in Cheno- 



podium. 

 Scarioiis. Thin, dry, and translucent, not green. 

 Seed. The matured and modified ovule with a dormant embryo. 

 Self-pruning. The process by which living buds or twigs are naturally 



separated frorh the plant. 

 Self-pruning scar. A scar produced where a twig or bud has been self- 

 pruned. 

 Sepal. One of the leaves of a calyx. 

 Septicidal. A capsule which splits longitudinally through its partitions 



thus dividing it into its component carpels. 

 Serrate. With teeth projecting forward. 

 Sessile. Without a stalk. 

 Sinuate. With strongly wav}- margins. 

 Sinus. The space between two lobes. 

 Spermary. The male reproductive organ. 

 Spermatozoid. The male gamete. 



Spike. An elongated inflorescence with sessile or nearly sessile flowers.. 

 Spine. A sharp thorn-like organ not representing a stem in origin, as 



the spines on the leaves of the Christmas holly. 

 Spore. A modified reproductive cell. 

 Sporophyte. The nonsexual generation of plants. 

 Spur. A short stunted branch not representing a true dwarf branch and 



not ending in a thorn-like point; any projecting appendage of 



a flower looking like a spur. 

 Stamen. The organ of a flower which produces microsporangia, which 



contain the microspores which later develop into pollen grains. 

 Staminate. Having only stamens or staminate flowers. 

 Stellate. Star-like. 

 Sterigma. A small, short, peg-like projection on which certain leaves,. 



spores, etc., are borne. 

 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. 



