ORCHIDACEAE 
Spiranthes ochroleuca (Rydb.) Rydb. [S: S. cernua (L.) Richard 
var. ochroleuca (Rydb.) Ames] (Missouri materials 
attributed to this northeastern taxon are referrable to 
S. magnicamporum Sheviak) (Sheviak, 1982; Sheviak 
and Catling, 1980), p. 482 
OXALIDACEAE 
Oxalis lyonii Pursh [O. priceae Small ssp. texana (Small) Eiten] 
(Mihlenbach, 1979; Lourteig, 1979) (the single 
specimen (Miihlenbach 3220, MO) upon which 
Miihlenbach (1979) based his Teport of this species’ 
occurrence in Missouri was misdetermined and is 
actually O. comiculata EB) 
POLYGONACEAE 
species are referrable to R. cristatus 
Rumex orbiculatus A. Gray (Missouri materials attributed to this 
DC.) 
(Miihlenbach, 1983), p. 580 
PRIMULACEAE 
Anagallis arvensis L. Ssp. caerulea (Schreber) Voilm. [S: A. 
arvensis f. caerulea (Schreber) Baumg.; M: A. arvensis] 
(the infraspecific taxonomy of this species has been 
confused by repeated attempts of authors to delimit a 
blue-flowered taxon under the name caerulea: in 
are apparently all ssp. arvensis; see Taylor (1955) and 
Channell and Wood (1959) for discussion), p. 1171 
S: Steyermark G: Great Plains Flora M: Mohlenbrock 
