258 MANUAL OF MODERN VITICULTURE. 



STAMENS The male organs of flowering plants, standing in a circle within 

 the petals. They usually consist of a filament and an anther, being the 

 essential part in which the pollen or fecundating dust is formed. 



STERILE Incapable of reproduction ; not able to germinate or bear fruit, 

 as a sterile flower, which bears only stamens. 



STIGMA The apical portion of the pistil in flowering plants. 



STOCK, grafting Part which bears the scion in plants. 



STOMATA, sing. STOMA (Bot.) The line of opening of a spore case. 



STRATA, sing. STRATUM (Geol.) Beds of earth or rock of one kind formed 

 by natural causes, and consisting usually of a series of layers. 



STRIATED Marked with striae, or fine grooves or lines ; showing narrow 

 structural bands of lines. 



STYLE (Bot.) The middle portion of the perfect pistil, which rises like a 

 column from the ovary and supports the stigma at its summit. 



SUBEREOUS TISSUE (suberous or suberose) Having a corky texture. 



SUBLIMATE SULPHUR Lemon-yellow powder, called flower of sulphur, 

 obtained by distillation of raw sulphur. 



SUB-MEDIUM Under the average. 



SUB-ORBICULAR Having an elliptic outline. 



SuB-RiBS Secondary ramifications of the ribs of a leaf. 



SUB-VEINS Same meaning as sub-ribs. 



SULPHATE OF COPPER Compound of sulphuric acid and copper, commonly 

 called bluestone. 



SULPHATE OF IRON Compound of sulphuric acid and iron, commonly called 

 green vitriol. 



TENDRIL (Bot. ) A slender leafless portion of a plant, by which it becomes 

 attached to a supporting body, after which the tendril usually con- 

 tracts by coiling spirally. The tendrils of a vine are metamorphosed 

 grapes. 



TERNARY HYBRID Hybrid resulting from the crossing of three c^pages. 



TERTIARY The latest geological epoch, immediately preceding the estab- 

 lishment of the present order of things. 



TOMETOSE (Bot.) Covered with matty woolly hairs. 



TOMENTUM (Bot.) The closely matted hair or downy nap covering the 

 leaves or stems of some plants. 



TOOTH Angular or rounded prominence on the margin or edge of a leaf. 



TRILOBATE Having three lobes. 



TRITURATED SULPHUR Ordinary roll sulphur ground into a powder. 



TUBEROSITIES Knob-like prominences developing on vine roots attacked 

 by phylloxera. 



TUFA See quaternary tufa. 



UNDULATING LEAF Rising and falling like waves. 



VARIATION A varied form of a variety. 



VARIETY Differs from a species in that when propagated by seed it will 

 revert to another form. See species. 



ZOOSPORE (Bot.) A spore provided with one or more slender cilia, by the 

 vibration of which it swims in water. 



