330 GLOSSARY. 



Rhizome, a prostrate more or less subterranean stem producing roots and leafy 



shoots. 

 Rhomboidal, approaching a quadrangular, not square, figure attached by one of 



its more acute angles. 



Ringent, a 2-lipped, widely open corolla, like that of the Dead-nettle (Lamium). 

 Rootstock, a thick short rhizome or tuber. 

 Rosette, a collection of leaves growing close together, like the petals of a double 



rose. 



Rotate, a monopetalous corolla with a short tube and very spreading limb. 

 Rugose, covered with a net of lines inclosing convex spaces. 

 Rugulose, finely rugose. 



Runcinate, where the lobes of leaves are directed towards the base, 

 Runner, a prostrate shoot rooting at its end. 

 Sagittate, like the barbed head of an arrow, the auricles or lobes pointing 



backwards. 



Salvershaped, a corolla with a long slender tube and flat limb. 

 Scabrous, rough. 



Scales, minute rudimentary leaves. 

 Scape, a leafless radical peduncle. 

 Scarious, with a thin, dry, and shrivelled appearance. 

 Secund, all turned towards one side. 

 Sepals, the divisions of the calyx. 

 Serrate, toothed like a saw. 

 Serratures, teeth like those of a saw. 

 Serrulate, with very small saw-like teeth. 

 Sessile, without a stalk. 



Seta, a bristle ; a bristle tipped with a gland ; a slender straight prickle. 

 Setaceous, like a bristle. 



Setose, bearing bristles or setae usually ending in glands. 



Sheath, the lower part of a leaf or its petiole, which forms a vertical sheath sur- 

 rounding the stem. 



Silicle, a silique about as long as it is broad. 

 Silique, a long pod-like fruit of Crucifers having its edges connected by an in- 



ternal membrane. 



Simple, not compound ; not branched. 

 Sinuate, having many large blunt lobes. 

 Slashed, with deep tapering incisions. 

 Smooth, free from all kinds of roughness. 

 Solitary, growing singly. 



Spadix, a succulent spike bearing many sessile closely placed flowers. 

 Spathe, a large bract often inclosing a spadix. 

 Spathulate, oblong, with a long and narrow base. 

 Spike, a long simple axis with many sessile flowers. 

 Spikelet, the small group of flowers in Grasses inclosed within one or more 



glumes. 



Spine, a stiff sharp woody persistent thorn. 

 Spinose, furnished with spines. 



Spinulo&e, with small, often very minute spines or prickles. 

 Spur, a tubular extension of the lower part of a petal or monopetalous corolla ; 



a loose prolongation of the base of a leaf beyond its point of attachment. 



