Keckiella: New name for Keckia straw (Scrophulariaceae) Richard M. Straw OriginalPaper Pages: 203 - 204
Complex chemical variation and the taxonomy of Hymenoxys scaposa (Compositae) Peter SeeligmannR. E. Alston OriginalPaper Pages: 205 - 211
Some Umbelliferae of the Andean paramos of South America Mildred E. MathiasLincoln Constance OriginalPaper Pages: 212 - 226
The genera Amblostoma, Lanium, and Stenoglossum (Orchidaceae) Robert L. Dressler OriginalPaper Pages: 237 - 243
Notes on Mexican grasses VII. New name for a dioecious endemic John R. Reeder OriginalPaper Pages: 244 - 244
Hesperozygis pusilla (Labiatae), a new species from Mexico Robert S. Irving OriginalPaper Pages: 245 - 247
Novelties in Satureia sect. Gardoquia (Labiatae) Rogers McVaughRudolf Schmid OriginalPaper Pages: 261 - 267
Calyptocarpus vialis and C. wendlandii (Compositae) Rogers McVaughNancy J. Smith OriginalPaper Pages: 268 - 272
Variation of chromatographic spot patterns of two species of clonal plants grown under controlled environmental conditions G. A. BallE. O. BealE. A. Flecker OriginalPaper Pages: 273 - 279
Commelina benghalensis, a species new to the United States Wilbur H. Duncan OriginalPaper Pages: 282 - 282
Acacia macracantha, a tree new to Florida and the United States Daniel B. Ward OriginalPaper Pages: 283 - 284