GLOSSARY 649 



Rhizome. — Rootstock; underground stem, usually horizontally elongated. 

 Rotate. — Wheel-shaped. 

 Ruderal. — Growing in waste places; weed. 



Runner. — A prostrate, slender, above-ground stem, such as in the straw- 

 berry. 



Saccate. — With a sac. 



Sagittate. — Shaped like an arrow-head, with the lobes turned downward. 



Salverform (sympetalous corolla). — Tubular with a spreading limb. 



Scabrous. — Rough. 



Scale. — Reduced leaf that appears lower on the stem than the foliage leaves. 



Scapose. — Bearing a nearly leafless flower stalk arising from the base of 

 the plant. 



Schizocarp. — A dry, indehiscent fruit, of two carpels, each one-seeded, 

 which split apart at maturity into two halves or mericarps. 



Sclerenchymatous.—Compostd of cells that fit closely together and have 

 thick, hardened walls. 



Scutellum. — Morphologically, the cotyledon of the grass embryo. 



Segment. — A division of a leaf, fruit or flower. 



Seminal. — Belonging to the seed. 



Septum. — Partition or dividing wall. 



Serrate. — With sharp teeth that point forward. 



Sessile. — Sitting; without a stalk. 



Sheath. — A tubular envelope about the stem, such as occurs in the leaves of 

 grasses. 



Silicle. — Similar to a silique, except that it is broader than long. 



Silique. — Pod-like fruit of mustards, dehiscent, two-valved, and with two 

 parietal placentas; longer than broad. 



Sinuate. — Wavy along the margin. 



Sinus. — The space between two lobes. 



Spathe. — A large bract or pair of bracts, subtending a spadix or flower 

 cluster. 



Spatulate. — Shape of a spatula or spoon. 



Spicate. — Spike-like. 



Spike. — An indeterminate type of inflorescence in which numerous sessile 

 flowers are borne on a rachis. 



S pikelet. — The unit of inflorescence in grasses and sedges; a small spike. 



Spinulose. — With small spines. 



Squarrose. — With spreading parts. 



Staminal. — Of or pertaining to stamens. 



Staminate (flowers). — Bearing stamens only. 



Staminodeal. — Pertaining to staminodia, i.e., abortive and sterile stamens. 



