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GLOSSARY 



rest, especially when ligulate; the 

 branch of an umbel. 



Receptacle. The more or less ex- 

 panded or produced end of an axis 

 which bears the organs of a flower 

 or the collected flowers of a head. 



Recurved. Curved outward or back- 

 ward. 



Reflexed. Bent outward or back- 

 ward. 



Regular (flower). All the parts of 

 each whorl similar. 



Reniform. Kidney-shaped. 



Repand. Wavy-margined. 



Retrorse. Directed back or downward. 



Retuse. The apex slightly indented. 



Revolute. Rolled backward, as the 

 margins of many leaves. 



Rhizome =Rootstock. A subterranean 

 or creeping rootlike stem. 



Rib = Vein. 



Ringent. Gaping. 



Rootstock = Rhizome. 



Rosulate (leaves). In a rosette, or 

 basal whorl. 



Rotate. Wheel-shaped. 



Rudimentary. Imperfectly developed, 

 or in early stage of development. 



Rugose. Wrinkled, roughened with 

 wrinkles. 



Runcinate. Coarsely saw-toothed or 

 cut, the pointed teeth turned 

 toward the base of the leaf, as in 

 dandelions. 



Runner. A slender and prostrate 

 branch rooting at the end or at the 

 joints. 



Sac = Sack. Any closed membrane, or 



a deep purse-shaped cavity. 

 Saccate. Sac-shaped. 

 Sagittate. Arrowhead-shaped. 

 Salver-shaped = Salverform. With a 



border spreading at right angles to 



a slender tube. 

 Samara. A wing fruit, e.g., maple, 



ash, elm. 

 Scabrous. Rough or harsh to the 



touch. 



Scale. A reduced leaflike body which 



is not green. 

 Scape. A peduncle rising from the 



ground, naked or without ordinary 



foliage. 



Scapose. Scapelike; or with a scape. 

 Scarious. Thin, dry, membranous, 



and not green. 

 Scorpioid. Curved or circinate at the 



end. 

 Scurf. Minute scales on the surface 



of many leaves. 

 Scutellate. Saucer-shaped. 

 Secund. One-sided, as where flowers, 



leaves, etc., are all turned to one 



side. 



Semi-. Half. 

 Sepal. One of the leaves of which the 



calyx is composed. 

 Septate. Divided by partitions. 

 Septum (septa). A partition, as of a 



pod, etc. 



Sericeous. Clothed with satiny pu- 

 bescence. 

 Serrate. With margin cut into teeth 



pointing forward. 

 Serrulate. Diminutive of serrate. 

 Sessile. Without any stalk or petiole. 

 Sheath. A tubular envelope, as the 



lower part of the leaf in grasses. 

 Shrub. A woody perennial, smaller 



than a tree, usually with several 



stems. 



Silique. The pod of the Cruciferaceae. 

 Silky. Glossy with a coat of fine and 



soft, close-pressed, straight hairs. 

 Silvery. Shining white or bluish gray, 



usually from a silky pubescence. 

 Simple. Of one piece; the opposite 



of compound. 

 Sinuate. Strongly wavy. 

 Sinus. The cleft or depression be- 

 tween two lobes. 

 Spadix. A flashy spike. 

 Spathe. A bract which sheaths an 



inflorescence, specially a spadix. 

 Spatulate. Shaped like a spatula, or 



druggist's spoon. 

 Spicate. Spikelike ; in a spike. 



