Revolute Segments 
of Perianth. 
A Ringent Corolla. 
Salvia. 
Rhizonne or Root- 
stock. 
Rotate Flower. 
Potato Blossom. 
Sagittate Leaf. 
Leaf with Sinuate 
Margin. 
Radical : Pertaining to the root, or apparently coming 
from the root. 
Radicle : The first root of a plant in the embryo. 
Ray : A marginal floret of a compound flower ; as in 
the Aster, Sunflower, &c. ; the branch of an umbel. 
Receptacle : Head of a flower-stalk from which the or- 
gans of a flower grow or into which they are inserted. 
Reflexed : Bent outwards or backward. 
Revolute : Rolled backward. 
Ringent : Grinning, gaping open. 
of the principal pieces of the framework of 
Rib 
One 
a leaf. 
Rootlets : Little roots or root-branches. 
ROOTSTOCK : Root-like stem under ground ; an under- 
ground stem. 
Rotate : Wheel-shaped ; a monopetalous corolla, ex- 
panding into a flattish border, with scarcely any tube. 
Rugose : Wrinkled, roughened with wrinkles. 
Sagittate : Arrow-shaped. 
Scabrous : Rough to the touch. 
SCANDENT : Climbing. 
Scape : A peduncle or flower-stalk rising from the crown 
of a root. 
Sepal : A single part or division of the calyx. 
Serrate : Toothed, like a saw ; having the margin cut 
into teeth pointing forward. 
Serrulate : Same as " serrate," but with fine teeth. 
Sessile : Sitting ; without a stalk ; as a leaf without a 
petiole, or anther without a filament. 
SiLlCLE : A short and broad pod of the Cress family. 
SiLlQUE : A long pod peculiar to the Cress family. 
Sinuate : Strongly wavy. 
Spadix : A fleshy spike of flowers. 
Spathe : A sheathing bract which envelopes a spadix. 
Spicate : Pertaining to or resembling a spike. 
Spike : A flower-cluster in which the flowers are sessile 
on the axis or rachis, as in the Mullein. 
Spine : A thorn. 
Spindle-shaped : Tapering to each end like a Radish. 
Spinose : Thorny. 
Stamen : One of the essential organs of a flower, which 
secretes and furnishes the pollen or fertilizing dust ; it 
consists of two parts, the anther and the filament. 
Staminate : Furnished with stamens. 
Stellate : Starry ; arranged in rays like those of a star. 
Calla Spathe, en- 
closing Spadix. 
Spike of Gladiolus. 
Spines. 
A Scape. Tulip. 
Trillium. S, sepals 
Leaf, with Serrate 
Margin. 
Sessile Leaves 
Silique of Mustard. 
Stamen. 
44 
