493 



1843. Schauer (1843), speaking of E. eximia, says (Walp. Re]], ii, 925) — 



" Operculo coriaceo convexo umbonato, post anthesin aliquamdiu cupulse cardine quasi adligato 

 cum cupula obconica rugoso-angulata (et reliquis partibus ? . . . .)", which may be translated — 

 ''.... the coriaceous convex, umbonate operculum some time after the flowering (of the calyx-tube) 

 having the hinge almost bound with the obconical rugose-angulai calyx-tube (also the remaining parts ?) 



1844. See also E. maculata (Hooker, 1844). 



1879-84. Mueller's " Eucalyptographia " (1). See also E. eximia quoted at 

 p. 490, and E. Preissii, E. terminalis, E. Abergiana. quoted at p. 9, Part XLI. 



(2) Operculum " tearing off along a rather irregular transverse line " (under 

 E. corymbosa). 



Other species in which I have seen the hinged operculum are E. Abergiana, 

 E. jicifolia, E. Foelscheana, E. hcematoxylon and E. trachyphloia. (All these belong to 

 the Corymbosse. It appears, indeed, to be more or less characteristic of that group). 



Drawings of the hinged operculum in E. Jicifolia and E. hcematoxylon will be 

 shown later. 



In addition, I have seen it in E. cosmophylla (fig. 8b. Plate 91), E. grandifolia 

 (fig. 2b, Plate 153). 



To recapitulate, we have — 



E. Abergiana. E. hcematoxylon. 



E. cosmophylla. E. Preissii. 



E. Jicifolia. E. piriformis, fig. 3«, Plate 75. 



E. Foelscheana. E. trachyphloia, 

 E. grandifolia. 

 and I am confident that special search will add to this list. 



Commisural Line (or Egg in Egg-cup Appearance). 



Above, p. 464, Robert Brown (1814) had referred to the commisural line as 

 " the cicatrix caused by the separation of the outer operculum is par- 

 ticularly obvious . . . ."' 



Under E. rudis in " Eucalyptographia," Mueller uses the term '*' Commisural 

 line between the Ud and tube of the calyx rather prominent," &c. I have explained 

 the matter under E. rudis, Part XXXIII, p. 75. 



This Commisural fine, which results in an " egg in egg-cup " appearance, as I 

 have often called it, is the sign of a double operculum. It can be observed in most species, 

 and will probably be found in all. and therefore be found to be generic. It can be 

 distinctly seen in figures of the buds of the following species in the present work : — 



E. amplifolia 



Fig. 



... 2c 



Plate. 



131 



E. canalicidata 



Fig. 



... 96 



Plate. 



122 



E. angustissima 



la 



84 



E. cneorifoUa 



... 15a 



60 



E. Bancrofti ... 



6c 

 36 and 3a 



129 

 130 



E. falcata 



3a 



68 



E. Ccdeyi 

 L 



... 13c 



56 



E. Forrestiana 



la 



95 



