GLOSSARY OF TECHNICAL TERMS 307 



Radiate. Spreading from a common center. 



Receptacle. The axis of a flower bearing the, floral organs, or the common 



axis or support of a flower cluster. 

 Reflexed. Directed backwards or outwards. 

 Regular. Said of all parts equal in shape or size. 

 Reticulated. Netted, said of veins when they are arranged in a net-work 



fashion. 

 Retrorse. Directed backward or downward. 

 Return. The apex rounded and slightly indented. 

 Revolute. Rolled backward. 

 Rhachis. Same as rachis. 

 Rostrate. Beaked . 



Rudimentary. Imperfectly developed. 

 Rugose. Wrinkled. 



Sagittate. Shaped like the head of an arrow. 



Samara. An indehiscent winged fruit; for example, the key fruit of the 



maple. 

 Scabrous. Rough and coarse to the touch. 

 Scaly. Furnished with scales or scale-like. 

 Seed. The fertilized and mature ovule. 

 Semi-. In a Latin compound, meaning half. 

 Sepal. A division or leaf of the calyx. 

 Sepaloid. Sepal-like. 

 Septate. Divided by a partition. 

 Septicidal. Splitting open through the partitions. 

 Septum. A partition. 

 Seriate. In rows. 

 Sericeous. Silky. 



Serrate. The margin beset with teeth pointing forward. 

 Serrulate. Serrate with fine teeth. 

 Sessile. Without a stalk. 

 Setose. Beset with bristles. 

 Setulose. Provided with minute bristles. 

 Shrub. A woody plant not over five m. high, and usually dividing into 



several small stems at the ground. 

 Simple. Of one piece, in contrast to compound. 

 Sinuate. Wavy margined. 



