GLOSSARY OF TERMS. 331 



Rhomboidal Irregularly rhombic. 

 Rootstock See Rhizome. 



Rosettes Leaves closely and spirally arranged, as in the House- 

 leek and in the double flower of the Rose. 



Rotate Wheel-shaped. 



Ruminated Albumen is said to be ruminated when the inner 

 seed coat is folded into its substance, as in the Nutmeg and 

 Areca Nut. 



Scyphi The wineglass-like organ bearing the fructification at 

 the apex in the genus of lichens called Cladonia. 



Secondary umbels Called also partial umbels ; when each 

 stalk of an umbel bears a smaller or secondary umbel at its 

 apex. 



Serrate Having oblique teeth like a saw. 



Sessile Having no leafstalk, and therefore, so to speak, sitting 

 on the stem. 



Sinuate Having incisions rounded at the base, as in the Oak 

 leaf. 



Spatulate Shaped like a spatula or flattened spoon. 



Spike An inflorescence in which flowers without stalks are 

 arranged along a central stem, either loosely or densely, as 

 in Agrimony and Plantain. 



Spine The hardened projecting vein of a leaf, as in the Holly 

 and Thistle. 



Spore cases Receptacles containing spores. 



Spur A more or less tubular projection at the base of the 

 corolla, as in the Toadflax and Columbine. 



Stamens The male organ of the flower, consisting of two 

 anthers, usually oblong or reniform in shape, containing 

 pollen, and often borne on a stiff thread or filament. 



Staminode A barren stamen, containing no pollen, as in 

 Scrophularia, 



Stellate With rays like a star. 



Stigma The sticky apex of the style of the female organ of 

 the flower, to which pollen is carried by insects or the wind. 



Stipules Small leaf-like organs, at the base of the leafstalks, 

 or attached to the stem between the leaves. In the Poly- 

 gonacecB membranous stipules form a sheath, called an ochrea, 

 round the stem. 



Stipulets or sti pels Small leaflets at the base of the leaflets 

 in compound leaves, as in the Dwarf Elder. 



Stomata Microscopic openings in the surface of the leaf, mostly 

 on the under surface, whereby air enters the tissues. 



