. Botany of the southern states. In two parts. Part I. Structural and physiological botany and vegetable products. Part II. Descriptions of southern plants. Arranged on the natural system. Preceded by a Linnaean and a dichotomous analysis. Plants. w STAMENS. of the calyx. It was on this circumstance that Linnreus founded his test for the distinction of calyx and corolla. If the stamens were opposite the segments of the floral envelope, he called it a calyx; if alternate, it was to be called a corolla. When but one row of each is developed, this is no doubt an undeviating criterion ; but it may
. Botany of the southern states. In two parts. Part I. Structural and physiological botany and vegetable products. Part II. Descriptions of southern plants. Arranged on the natural system. Preceded by a Linnaean and a dichotomous analysis. Plants. w STAMENS. of the calyx. It was on this circumstance that Linnreus founded his test for the distinction of calyx and corolla. If the stamens were opposite the segments of the floral envelope, he called it a calyx; if alternate, it was to be called a corolla. When but one row of each is developed, this is no doubt an undeviating criterion ; but it may happen, supposing the real corolla to be present, that the whorl of stamens next above it is suppressed and the second whorl only developed. In such cases, the stamens would necessarily be opposite the segment; but by the application of Linnaeus' criterion, the inner envelope would be a calyx and the outer the corolla, as in the whole order of Primulaeece, in which the regular calyx is present. This ar- rangement may easily be accounted for upon the above suppo- sition ; and it receives confirmation from the fact, that some plants having twice as many stamens as petals, and having the appearance of being in a single row, yet half of them are alter- nately longer than the other half. This occurs in the Oxalis, giving probability to the supposition that the five short stamens of the Oxalis were prevented from being developed as perfectly as the other five; and had they been entirely prevented, we should thus have had an arrangement similar to the Lysimachia with the opposite stamens. The number of stamens is generally the same as the petals or lobes of the corolla, or a multiple of the number. 119t Whatever may be the apparent origin of the stamen, its real origin is always the same, that is, between the base of Fig. 119. Fig. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearan
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