298 DR. M. T. MASTERS ON SOME POINTS ІМ 
Braun, Verhandl. des bot. Vereins der Provinz Brandenburg, 1874, p. 45. 
Сеглкоувку, Flora, 1874, p. 170; and Vergleichende Dartstellung der Placenten in den Fruchtknoten 
der Phanerogamen, 1875. Placenta of Primulacez considered to be axial. 
Ercuter, Blüthendiagramme (1875), p. 327. Considers that the outer row of stamens is abortive, the 
inner congenitally united with the petals. The placenta is considered axial, and the ovules foliar. 
Morgen, C., Bull. Acad. Roy. de Belgique, t. xix. No. 8, p. 539, c. tab.: Primula prenitens, vires- 
сепсе and phyllomorphy of flower. Bull. Acad. Roy. de Belgique, xix. p. 97, с. tab.: calycanthemy. 
DESCRIPTION OF THE PLATES. 
Puare XXXIX. 
Figs. 1-9 inclusive represent various Stages in the Development of the Flowers of Primula japonica. 
The figures are all highly magnified. 
Fig. 1. The young flower, seen from the side, with its bract b; c, the calyx; st, the staminal tubercles. 
Fig. 2. Flower, seen from the top. "The calyx is formed, and also the staminal tubercles, but no petals 
or pistils. 
Fig. 3. View of a fragment of a flower, showing three sepals and two stamens, with indications of the 
petals, p, at their base. 
Fig. 4. Side view of a flower rather further developed. The sepals are removed ; the staminal tubercles, 
‘st, are shown, with the petals, p, and the commencement of the corolla-tube. 
Fig. 5. Portion of a flower still further developed, seen from within, and showing three staminal tubercles 
and the commencement of three carpellary tubercles, c. 
Fig. 6. Fragment of a flower in a further stage of development. Three carpels are shown free above, but 
congenitally coherent below ; the placenta, pl, is already formed in the shape of a dome-shaped 
mass, studded towards the base with ovules, which develop from above downwards. 
Fig. 7. Section of the young pistil of another flower, with the placenta, pl, not yet producing ovules, 
although the development of the pistil is further advanced than in the preceding. 
Fig. 8. Pistil in a further stage of development, and nearly closed. 
Fig. 9. Diagrammatic section of a flower with вера! (s), stamen (st), petal (p), carpel (c), and placenta 
(pl), all formed, and the upraising of the so-called corolla-tube just begun. 
Figs. 10-23. Illustrations of Chorisis and of Enation in the petals and stamens of Primula vulgaris etc. 
АП slightly enlarged. 
_ Fig. 10. Lateral chorisis of the petals; the venation at the base shows that each of the original vascular 
1 bundles destined for the petals is split into two divisions. 
| Figs. 11-16. Enation; various outgrowths from the petals. 16. Section showing plan of arrangement 
| of parts in fig. 15. 
Fig. 17. Supernumerary petals in Primula Auricula. Fig.18. Sectional plan of the same. 
| б ET Stamen of Primula vulgaris, with a petal growing from it, and two supernumerary petaloid out- 
_ growths, developed in the order shown by the numerals (1. п. п. ту.) in fig. 20. 
Fig. a. Petal of Primula vulgaris, with petaloid anther. Fig. 21 а. Similar anther detached. 
Fig. 22. 2. Petaloid stamen of a variety of Polyanthus, “the Nigger,” developing from either side, by 
| ition, secondary petaloid laminz in the order in which they are numbered (1. to у. ). Fig. 23. 
Plan of he sa мец 21 the Roman numerals corresponding. 
