204 GLOSSARY 
Regular (of flowers)—When the petals are all alike. 
Rhizome—A fleshy horizontal underground stem putting up stems 
from its upper surface (So/omon’s-Seal). 
Root-stock—An underground stem. 
Rostellum (in Orchideze)—A projecting lobe of the stigma beneath 
the anther, 
Rotate (of the corolla)—When the lobes are spread out flat (Przm- 
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. 
Szlicula—A short broad siliqua (Shepherd’s-Purse). 
Szligua—An elongated bilocular capsule, with the ovules attached 
to the margin of the septum (Crucifere). 
Spadix—A fleshy spike of unisexual flowers (Arum). 
Spathe—A large bract enveloping an inflorescence (Arum, Allium). 
Spike—An inflorescence composed of sessile flowers arranged on 
an axis (Plantago, Wheat). 
Staminode—An imperfect stamen (Borraginea). 
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 /vee (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 (Hof). 
Superior (of calyx)—Apparently above the ovary ; (of ovary)— 
above the calyx. 
