342 Hartog, Organogenic Notes, 



a reductio ad absurdum: a zoologist might as well regard the 

 central canal of the cerebro-spinal axis as morphologically different 

 in the Shark and the Salmon, seeing that in the former it is 

 formed by the shutting in of the medullary groove, and in the 

 latter by internal dififerentiation. 



Ehenacece. The only published observations on the floral develop- 

 ment of this order are those of which I gave a precis in my Sapota- 

 cese paper. I may here note, before giving them in füll, that Eichler 

 (Blüthendiagr., I, 234) remarks that the flower is apparently diplo- 

 stemonous with deduplication of both verticils of stamens; or in 

 some cases (Euclea, Biospyros spp.) , „dass die Staubgefässe zu 2 

 und 2 oder in paarigen Bündeln vor den Kronlappen stehen, was 

 möglicherweise auf collaterale Dedoublement eines der beiden 

 Cyclen beruht, während der andere nicht ausgebildet ist." It is 

 worth recalling that Macreightia obovata Mart. is figured in the 

 Flora Brasiliensis {Ebenacece t. II, fig. 3) with 3-fid alternipetalous 

 stamens, the branching being that of a 3-floral scorpioid cyme. 



The species in which I was able to study the male flowers 

 and inflorescence were Diospyros Embryopteris Pers. and D. sylvatica 

 Roxb, In D. Embryopteris the inflorescence is axillary to the 

 foliage leaves; its axis first bears a lateral basal pair of bud- 

 scales, and above these a series of distichous bracts. Each of these 

 including the scales bears a flower in its axil and the axis is 

 terminated by a flower; a good example of a raceme with terminal 

 flower. Each pedicel bears a pair of bractlets, above which the 

 decussate imbricate calyx Springs in two successive whorls; while 

 the four alternisepalous petals are simultaneous, afterwards con- 

 volute in the bud, The first stamens arise as 4 antipetalous 

 puirs*) Then the receptacle widens out between these and the petals 

 and new whorls, of augmented numbers become intercalated in 

 descending order, much as Payer figures in Thea or Gordonia 

 (Organogenie t. 124). I have unfortunately no notes on the female 

 Organs. 



D. sylvatica. The axillary bud corresponding to that of the 

 inflorescence of the preceding species here lengthens out into a 

 shoot, on which leaves replace the distichous bracts; in the axil 

 of each leaf (but not of the basal pair of scales) is a flower bud 

 of which the bractlets are fertile and so on; so that a little 

 dichotomous cyme replaces the single flower. These cymes deve- 

 lope concurrently with the elongation of the leafy shoot. The 

 flower itself has the symraetry of the preceding species. 



This is no new instance of an order where in some species 

 a verlicillate descending eruption of stamens correspond to a less 

 abnormal androeceum with deduplication in others. I may cite 

 the tlosely allied Ternstrcemiacece, as well as Clusiacece, CistacecB, 

 Capparidace(E and Dilleniacece. It is obvious that Sapotacece come 



*) As I find on referring my original notes ; by some slip I described 

 tbem otherwise in the Sapotacese paper. 



