424 The New York State College of Forestry 



Racemose. Raceme like, or borne in racemes. 



Bachis. The axis of a compound leaf; the axis of a spike or raceme. 



Receptacle. The terniinal portion of an axis forming a common support on 



vvliich floral organs or flowers are borne. 

 Reflexed. Turned or bent abruptly backward. 

 Reniform. Kidney-shaped. 



Repand. With a slightly wavy or sinuate margin. 

 Resin. An amorphous substance that exudes from plants and supposed to be 



tlie product of oxidation of volatile oils. 

 Resin cyst. A sack or cavity filled with resin. 

 Resinous. Resin-bearing; having the qualities of resin. 

 Reticulate. Netted ; in the form of a network. 

 Retuse. With a shallow notch at a rounded apex. 

 Revolute. Rolled backward from the margin or apex. 

 Rhombic. With the shape of a quadrangular figure wdth equal sides but not 



right angles. 

 Roseate. Rosy; tinged with rose color. 

 Rudimentary. Undeveloped. 

 Rufous. Reddish brown. 

 Rugose. Wrinkled. 

 Rusty. Having the color of iron rust. 



Saccate. Sac-shaped. 



Samara. An indehiscent winged fruit. 



Samaroid. Diminutive of samara. 



Scabrous. Rough to the touch. 



Scale. A thin scarious body, usually a degenerate leaf, sometimes of epi- 

 dermal origin. 



Scaly. Bearing scales. 



Scarious. Thin, dry, membranous, often translucent. 



Scurfy. Covered with small bran-like scales. 



Seed. The ripened ovule consisting of the embryo and its proper coats. 



Seminal cavity. The cavity in which the seed or seeds are borne. 



Sepal. One of the modified leaves forming the calyx. 



Septate. Divided by partitions. 



Septicidal. Dehiscing through the partitions and between the locules. 



Serrate. Toothed, with the teeth directed forward. 



Serrulate. Diminutive of serrate. 



Sessile. Without a stalk. 



Shrub. A woody plant, generally under twenty feet in height, usually with 

 several stems. 



Silky. Covered with close-pressed, soft and straight pubescence. 



Sinuate. With a strongly wavy margin. 



Sinus. The opening between two lobes of a leaf. 



Spatulate. Gradually narrowed downward from a rounded summit. 



Spicate. Arranged in or resembling a spike. 



Spike. A sim})le indeterminate flower-cluster with sessile flowers. 



Spine. A sharp, woody or rigid outgrowth from the stem. 



Spinescent. Ending in a spine. 



Spinose, Spiny. Bearing spines. 



