REVISION OF RUMEX. 77 



hastate with a large decurrent rarely 1-toothed auricle on 

 each side, the upper gradually reduced and entire ; panicle 

 more or less compound, usually reddish, the filiform 

 ascending branches leafless ; pedicels capillary, once or 

 twice as long as the flower, articulated at summit; flowers 

 about 1.5 mm. the outer sepals granular ; achene four-fifths 

 as broad as long. Sp. i. ( 1753), 338 ; Meisner, DC. Prod, 

 xiv. 63. Introduced from the Old World, a weed every- 

 where especially in dry poor soil. Specimens examined 

 from British America from Prince Edward's Island and 

 Nova Scotia to Vancouver Island ; and from Massachusetts, 

 Ehode Island, Connecticut, New York, New Jersey, Penn- 

 sylvania, Maryland, West Virginia, North Carolina, South 

 Carolina, Florida, Mississippi, Louisiana, Ohio, Minnesota, 

 Michigan, Wisconsin, Illinois, Missouri, Iowa, Kansas, 

 Colorado, Texas, and California. Plate 13. 



Acetosa- Dioecious: inner segments of perianth (valves) rather 

 finely reticulated, becoming round-cordate and much larger than the 

 achene: foliage acid: inflorescence with slender leafless branches. 

 Perennial. 



2. R. HASTATULUS, Baldw. Tufted, mostly a foot or 

 two high, leaves exceptionally 2.5x10 cm., oblong or ob- 

 lanceolate, obtuse to subacute, some of them, especially on 

 pistillate plants, hastate with a short and often broad spread- 

 ing auricle on each side; panicle mostly ample and rather 

 open ; pedicels capillary, once or twice as long as the fruit, ob- 

 scurely articulated below the middle ; valves about 4 mm. in 

 diameter, short clawed, sometimes slightly pointed, without 

 callosities, the middle sometimes papillate; achene 1x1.5 

 mm. MuhL Cat. 2 ed. (1818), 37; Elliott, Sk. Bot. S. 

 C. and Ga. i. (1821), 416; Watson, Bot. King. 314. 

 R. Engelmanni, Meisner, DC. Prod. xiv. 64. Sandy 

 bluffs and fields, Long Island to Florida, in the lower 

 Mississippi Valley, and in Texas. Specimens examined 

 from Aquebogue, (Young, 1873), and Wading River, 

 Long Island, (Hitter, 1873, 1878), New Jersey, (Smith, 



