204 GLOSSARY 



Regular (of flowers) When the petals are all alike. 



Rhizome A fleshy horizontal underground stem putting up stems 

 from its upper surface (Solomons- Seat}. 



Root-stock An underground stem. 



Rostellum (in Orchideas) A projecting lobe of the stigma beneath 

 the anther. 



Rotate (of the corolla) When the lobes are spread out flat (Prim- 

 rose ', Forget-me-not}. 



Runcinate (of leaves) With large coarse lobes near the base. 



Samara A winged indehiscent seed-vessel (Sycamore^ Elm). 



Scabrid Rough and tubercled. 



Scape The stalk of an inflorescence (usually leafless). 



Scarious Dry and shrivelled. 



Septum A division wall within an ovary. 



Sessile (of leaves or anthers) Without a stalk. 



Setaceous (of leaves) Very stiff and narrow ; bristle-like. 



Silicula A short broad siliqua (Shepherd* s-Purse). 



Siliqua An elongated bilocular capsule, with the ovules attached 

 to the margin of the septum (Crucifercz). 



Spadix A fleshy spike of unisexual flowers (Arum). 



Spathe A large bract enveloping an inflorescence (Aritm^ Allium}. 



Spike An inflorescence composed of sessile flowers arranged on 

 an axis (Plantago, Wheat}. 



Staminode An imperfect stamen (Borraginece). 



Stigma The portion of the pistil which receives the pollen- 

 grains. 



Stipule A leaf-like growth at the base of a leaf or leaf-stalk ; 

 stipules may be free ( Violet} or adnate to the petiole (Straw- 

 berry). 



Style The portion of the pistil intermediate between the ovary 

 and the stigma. 



Stolon A prostrate branch ending in a tuft of leaves which 

 becomes detached and roots itself. 



Strobile A catkin-like inflorescence with large bracts (Hop}. 



Superior (of calyx) Apparently above the ovary ; (of ovary) 

 above the calyx. 



