45 



6g. Versatile anther with largo gland, E. goniantha. One of the miscellaneous anthers indicated at top 

 of p. 535. 



6h. Anther of E. diversicolor. (See " Miscellaneous," top of p. 535.) This bears considerable affinity 

 to fig. 2 (Eenantheroide»), but seems to be anomalous, and may therefore be kept apart for further 

 information. 



Lack of Uniformity. — We must be careful not to suggest uniformity where it is non-existent. 

 It may be that we have only one specimen of a particular species, and, if other specimens were 

 found, the anthers would probably show some lack of uniformity. Indeed, in some common 

 species it becomes difficult to say what one would adopt as the typical form of the anther. This 

 is but an additional instance of the fact that all the organs of a species vary within limits — that 

 variation is a grand law of Nature. 



Gland. — In judging an immature anther, it is always the case that the gland is rather 

 large, and as growth progresses it becomes less in size, as if its partial absorption were necessary 

 for the development of the anther. I have briefly referred to the matter under E. Shirleyi, 

 Part LVIII, p. 425. 



Size. — In exhibiting a series of comparative drawings of anthers, one must be careful to 

 remember that they vary a good deal in size. Indeed, some are so small that a life-size drawing 

 would be of little value to the person of average eyesight. 



Inflection of Stamens. 



I have omitted illustrations in the present work, as Mueller has so freely shown them 

 in his longitudinal sections of the flower buds throughout the " Eucalyptographia." (See also 

 the statements in Part LIX, p. 546.) 



These two drawings, Nos. 7 and 8 (see also 19a, Plate 248), are intended more as a reminder 

 than anything else. 



7 is E. tetraptera Turcz., and 



8 is E. erythrocorys F.v.M.. both cultivated Botanic Gardens, Sydney, 10th July, 1922. 



7a is the wing of the calyx-tube and bud generally, and 



7b is the wall of the bud generally. 



In both figures, note that the stamens in the bud are inflected from the stigma. Notice 

 also the section through the ovary, and the curve of the top of the ovary. 



Style axd Stigma. 



9. From left to right, here are shown stigmas of E. terminalis F.v.M. (Darwin), two drawings showing 

 papillae round the edge of the stigma, and E. tetrodonla F.v.M. (Darwin) two. It is very difficult 

 to show differences in stigmas, other than those exhibiting an enlargement (as compared with 

 the stigma), and those practically of the same diameter as the style. The styles vary in length 

 of course. The young stigina of E. ptychocarpa from an unopened hud has been found to be 

 square in shape. 



Evolution of the Disc. 



10a-10e. E. tereticornis Sm. Floral disc conspicuous, forming a distinct dark, carnose, raised ring of 

 2-3 mm. around the base of the conical ovary, or projecting well beyond the stamlnal ring. Cap- 

 sular disc broad, domed, exceeding the calyx-rim by 3-4 mm. 



E. tereticornis, five figures (all enlarged) to illustrate the evolution of the adnate disc. 



(All from Outer Domain, Sydney.) 

 10a. (a) Calyx-tube. 

 (&) Calyx-rim. 



(c) Staminal ring. 



(d) Floral disc. 

 Ovary. 



