xii APPENDIX. 
Sinus, An indentation, either angular or rounded, separat- 
ing parts. 
Sordid. Rusty or dirty-colored. 
Sorus, Sori. A cluster of sporangia. 
Spadix. A spike with a thickened, fleshy rachis, usually 
subtended by a spathe. 
Spathe. A sheathing bract. 
Spithulate. Narrowly attenuate downward from an ab- 
ruptly rounded summit. 
Spicate. Like a spike. 
Spike. Resembling a raceme, but the flowers sessile, or 
nearly so. 
Spinescent. Ending in a spine or spiny point. 
Spinulose. Having diminutive spines. 
Sporangia. Cases which contain spores. 
Spores, The minute bodies in cryptogams, which answer 
somewhat to the seeds of other plants. © 
Squamose. Furnished with scales. 
Squarrose. Ivregularly spreading. 
Stipitate. Borne upon a stipe. 
Stipule. An appendage to the base of a petiole. 
Stamen. The male orgun of flowering plants, consisting 
of an anther borne usually upon a filament and containing 
the pollen. 
Staminodia. A sterile or undeveloped stamen. 
Strobilaceous. Inflorescence formed of imbricated scales, 
as in the Coniferas. 
Subulate. Awl-shaped. 
Suffrutescent. Slightly shrubby; woody at base. 
Sulcate. (Crooved or furrowed. 
Suture. A line of union. 
Synandre. Having united anthers. 
Syncarpous. Having united carpidia. 
Syngenesia. United anthers. , 
Tendril. A thread-like production in climbers. 
Terete. Cylindrical, or nearly so. 
Ternate. In threes. 
