GLOSSARY 67 



Perianth Applied to the leaves of the flower where nol clearly divided into calyx and 

 - dla 



Perigynium The sack-like membrane enclosing the ovary or the achene in the genua 

 Cares 



Perigynous Applied to a flower ill which the part-, are united into a cup around the 



o\ ary 

 Persistent Organs that remain attached after the growing season 

 Petal One of the inner set of Bower leaves, usually brightly colored, of a corolla 

 Petaloid Resembling a petal, especially as to color 

 Petiole The stalk of a leaf 

 Pilose With long soft hairs 



Pinnate Leaves divided into leaflets or segments along a common stalk 

 Pinnately In a pinnate manner 

 Pinnatifid Pinnately cleft to the middle or beyond 



Pistil The central or terminal organ in a flower, containing the young seeds 

 Pistillate With pistils but without stamens 

 Plumose Having tine hairs on each side like a feather 

 Plumy Feathery 



Pod A dry fruit made up of one carpel and splitting along two sides 

 Pollen Tlu minute grains found in the anther 

 Puberulent With very short hairs 

 Pubescent With hairs 



Raceme A more or less elongated axis bearing flowers with about equal pedicels 

 Rachilla The axis of a spikelet 

 Rachis The axis of a spike 



Ray One of the marginal flowers in the Asteraceae 



Receptacle The end of a flower stalk or axis bearing the floral organs; in the Aster- 

 aceae bearing flowers 

 Recurved Bent back 



Regular Having the members of each part alike in size and shape 

 Reniform Kidney-shaped 

 Resious Bearing resin 

 Retrorse Turned downward or backward 

 Rhombic In outline like a rhombus; obliquely four-sided 

 Rootstock An underground stem 

 Rotate Flat and circular in outline; wheel-shaped 

 Rush-like Resembling a rush 



Salverform Having a slender tube, abruptly expanded into a flat limb 



Samara A winged fruit 



Scabrous Rough 



Scale A minute or much reduced leaf 



Scape A leafless or nearly leafless stalk bearing a flower or a cluster of flowers and 



arising from the underground portion of a plant 

 Scurfy With small bran-like scales on the epidermis 



Segment One of the parts of a leaf or similar organ that is cleft or divided 

 Sepal One of the outer set of flower leaves, usually green 

 Serrate With teeth projecting forward 

 Serrulate Finely serrate 

 Sessile Without a stalk or pedicel 



Sheath The part of a leaf or leaf base which clasps or encloses the stem 

 Sheathing A term applied to the manner in which the base of a leaf wraps the stem 

 Shrub A woody plant: smaller than a tree 

 Simple Of one piece, not compound 

 Sinuate With strongly wavy margins 

 Spadix A fleshy axis bearing sessile flowers 



