582 



GLOSSARY. 



Rigidulous, somewhat rigid or 

 stiff. 



Rootstock, prostrate or under- 

 ground root-like stem, sending 

 up from season to season herba- 

 ceous shoots and bearing roots 

 on the underside. 



Rostrate, with a beak or spur; 

 narrowed into a slender pro- 

 cess. 



Rosulate leaves, radical leaves 

 spreading in a circle or rosette 

 on the ground. 



Rotate, wheel-shaped; spreading 

 flat or horizontally and circular 

 in outline. 



Rudiment, an imperfectly devel- 

 oped organ, a vestige. 



Rugose, having wrinkles. 



Runcinate, sharply incised with 

 the teeth or incisions turned 

 downward. 



Sagittate, shaped like an arrow- 

 head. 



Samara, an indehiscent winged 

 fruit like the key of a maple. 



Scabrid, slightly scabrous. 



Scabrous, rough to the touch. 



Scale, a small thin body, not at 

 all or little green, commonly 

 scabrous; in Graminese minute, 

 hyaline, scale-like organs at 

 the base of the stamens, whose 

 function is the opening of the 

 floral envelope at anthesis. 



Scape, a leafless flower-bearing 

 stem arising from the ground. 



Scarious, thin, dry and not 

 green. 



Scorpoid, said of a 1-sided in- 

 florescence which is circinately 

 coiled in the bud. 



Scurf, small, bran-like scales on 

 the stem or leaves. 



Secund leaves or flowers, inserted 

 on (or turned to) one side of 

 the stem. 



Sepal, a leaf or division of the 

 calyx. 



Septal, relating to a septum. 



Septicidal, a capsule splitting be- 

 tween the partitions of the 

 cells. 



Septum, a partition in an ovary 

 or fruit. 



Sericeous, silky with straight soft 

 hairs. 



Series, successive rows. 



Serrate, toothed or saw-like, with 

 the teeth turned forward or up- 

 ward. 



Sessile leaf, leaf without a petiole 

 and the blade seated directly 

 on the stem; sessile ovary, one 

 without a stipe. 



Set, a cluster or collection of 

 organs of the same kind; 

 stamens may be disposed in 

 several clusters or sets. 



Setaceous, bristle-like. 



Setose, beset with bristles. 



Sheath, in Gramineae, the basal 

 portion of the leaf, which 

 usua ly enwraps the stem. 



Sheathing, where the base of the 

 blade or expanded petiole com- 

 pletely encloses or sheathes the 

 stem for some distance above 

 the node. 



Sierras, short phrase for Sierra 

 Nevada Mountains, used not 

 only in western botanical liter- 

 ature but also in the general 

 literature and poetry of Cali- 

 fornia. 



Silicle, a short silique not much 

 longer than wide. 



Silique, a 2-celled capsule, several 

 times longer than wide, the 

 valves splitting from the bot- 

 tom. 



Simple, unbranched or without 

 branches; leaves are simple 

 when the blade is composed of 

 one piece; simple pistil, of one 

 carpel. 



Sinuate, with a recessed margin. 



