Studies in the Botany of the southeastern United States— 



By John K. Small, 



RuMEX Langloisii n. sp. 



Perennial, glabrous, somewhat scurfy, dark green (when dry). 

 Stem erect or ascending, 5-7 dm. tall, simple or with a few nearly 

 erect branches, more or less flexuous,at length strongly furrowed ; 

 leaves oblong or linear-oblong, 3-1 2 cm. long, acuminate or acutish, 

 erose crenulate, slightly crisped, somewhat prominently nerved es- 

 pecially beneath, narrowed into a petiole which is usually i or 2 

 cm. long ; ocreae very thin, early falling away ; panicle rather open, 

 not leafy, 1-2 dm. long ; racemes strongly ascending, 5-10 cm. 

 long, usually interrupted; flowers about 2 mm. long, in dense 

 whorls (in fruit) ; pedicels about 5 mm. long, articulated near the 

 base, enlarged towards the end ; wings rather coriaceous, deltoid, 

 4 mm. long, the sides rounded, the apex blunt, the surface promi- 

 nently nerved, each bearing a papillose calosity i mm. broad and 

 3 mm. long ; achene ovoid, nearly 3 mm. long, abruptly contracted 

 into a very short base, slightly acuminate at the apex, the faces 

 dark red, the angles slightly paler and margined. 



