332 
- 1974. Nomenklatorische Probleme in der Gattung Matricaria 
L. Folia Geobot. Phytotax. 9: 249-260. 
Raven, P. H. 1963. The Old World species of Ludwigia (including 
Jussiaea), with a synopsis of the genus (Onagraceae). Reinwardtia 
6: 327-427. 
- 1965. An earlier name for Ludwigia natans (Onagraceae). 
Rhodora 67: 83-84. 
& D. P. Gregory. 1972. A revision of the genus Gaura 
(Onagraceae). Mem. Torrey Bot. Club 23: 1-96, 
» W. Dietrich & W. Stubbe. 1979. An outline of the 
systematics of Oenothera subsect. Euoenothera (Onagraceae). 
Syst. Bot. 4: 242-252. 
Rebman, J. P. 1989. The vascular flora of Piney Creek Wilderness, 
Redfearn, P. L., Jr. 1982. New Selaginella species. Missouriensis 
3: 16-17. 
Reeder, C. G. 1975. Sporobolus R. Br. Pp. 286-311 in F. W. Gould, 
The Grasses of Texas. Texas A & M Univ. Press, College 
Reeder, J. R. 1986. Another look at Eragrostis tephrosanthos 
(Gramineae). Phytologia 60: 153-154, 
Rettig, J. H. 1989. Nomenclatural changes in the Carex pensylvanica 
group (section Acrocystis, Cyperaceae) of North America. Sida 
13: 449-452, 
1990a. Achene micromorphology of the Carex nigro- 
marginata complex (section Acrocystis, Cyperaceae). Rhodora 92: 
70-79, 
- 1990b. Correct names for the varieties of Carex albicans/C. 
emmonsii. Sida 14: 132-133. 
Reveal, J. L. & M. C. Johnston. 1989. A new combination in 
Phoradendron (Viscaceae). Taxon 38: 107-108. 
Reznicek, A. A. & P. W. Ball. 1974. The taxonomy of Carex series 
Lupulinae in Canada. Canad. J. Bot. 52: 2387-2399, 
& - 1980. The taxonomy of Carex section Stellulatae 
in North America north of Mexico. Contr. Univ. Michigan Herb. 
14: 153-203. 
Richards, A. J. 1985. Sectional nomenclature in Taraxacum 
(Asteraceae). Taxon 34: 633-644, 
Richardson, A. 1976, Reinstatement of the genus Tiquilia 
(Boraginaceae: Ehretioideae) and descriptions of four new 
species. Sida 6: 235-240, 
