158 GLOSSARY. 
Pistillate. Pertaining to the pistil. 
Polymerized. Changed into another substance, having the same atomic 
proportions but a higher molecular weight. 
Pubescent. Soft hairy. 
Pulmonary. Relating to the lungs. 
Pyloric. Relating to the pylorus, the opening from stomach to intestine. 
Raceme. A flower cluster resembling a spike but with the flowers stalked. 
Rachis. The central axis of a spike or of a compound leaf. : 
Radicle. The part of the seed that develops into the root. 
Revolute. In-rolled. 
Reflexed. Bent back. 
Regurgitation. Expulsion of stomach contents into mouth or nose. 
Rumen. The paunch, or first stomach. 
Ruminants. Cud-chewing animals. 
Sagitiate. Arrow-shaped. 
Salivation. Excessive production of saliva. 
Sclerotium. The wintering stage of Ergot, the hardened mass replacing the 
grain of the affected grass. . 
Screenings. Materials screened from grain or seed. 
'Sepal. One of the segments of the calyx. 
Serrate. Toothed like a saw. 
Sessile. Not stalked. 
Serum. The thin fluid which separates from blood when it clots. 
Silica. Silicon dioxide, the substance of which quartz sand is composed. 
Sinapism. A mustard-plaster. 
Sinuate. Wavy. 
Spadix. A spike with a fleshy axis. 
Spathe. The bract associated with the spadix. . 
Species. A group of plants or animals so nearly alike as to show only 
individual differences. 
Sphacelia. The stage of Ergot where summer spores are produced. 
Spike. A flower cluster with sessile blossoms arranged along a stalk, the 
youngest at the tip. 
Spikelet. A secondary spike. 
Sporangium. A spore-case. 
Sporangiophore. A structure bearing sporangia. 
Spore. A simple reproductive body usually composed of one cell. 
Stamen. The pollen-bearing organ of a flower. 
Staminate. Pertaining to stamens. 
Sterile. Producing no fruit. 
Stipules. Bracts at the base of a leaf. 
