Difference between postpartum and nutritional amenorrhea.

Winteraceae (3, 7) including several species of Bubbia (5). Leroy illustrated what is labeled as a dorsal view of the gynoecium [figure lB of (1)]. In the absence of developmental studies it would seem impossible to determine the morphologically dorsal side of such a structure in the center of the flower. If the gynoecium is in fact unicarpellate, then by analogy with other Winteraceae, the figure would not illustrate a dorsal view but rather one in which the dorsal and ventral surfaces are at the left and right sides of the illustration (7). Additional evidence is clearly needed before the gynoecium of B. perrieri can convincingly be termed compound. Thus, in the absence of illustrations showing cellular details in transversely sectioned material it would seem premature to consider two vertical grooves on diametrically opposed sides of the gynoecium as representing sutures. Evidence on gynoecial vascularization also is essential; cleared gynoecia with stained vascular bundles should unequivocally show the number of carpels, particularly as the results could be compared with similar preparations of other Winteraceae illustrated by Bailey and Nast (5). In view, then, of insufficient evidence at present for a compound ovary in B. perrieri, we suggest that this taxon should not currently be proposed as the basis for a new subfamily in the Winteraceae. Nor do we consider that the apparent differences Leroy cited in inflorescence structure between B. perrieri and other Winteraceae support such a concept. For example, although Leroy (1) noted that a special characteristic of B. perrieri was that, in the reproductive shoot, the bract function is filled by specialized scales rather than by ordinary leaves, bract scales have been recorded in other Winteraceae (2, 4, 8). Of necessity, Leroy (I) was only able to examine floral material from herbarium specimens of two parts of a flowering plant. We suggest that if, in fact, the material he examined is bicarpellary, had further material been available for examination, unicarpellate gynoecia might have been discovered. This suggestion is based on the observation (7) that, although most flowers of the reduced montane winteraceous species Pseudowintera traversii are unicarpellate, 15 percent have two carpels that, in material examined, are congenitally fused at their bases. In this plant, some immature fused carpels were found in which, at maturity, a unilocular syncarpous gynoecium would develop (7). Bicarpellate gy-