NOTES AND ABSTKACTS. 



643 



(Coumaronna) odorata, WillcL, and probably in all species of Dipteryx, 

 there are present, at all events when mature, two distinct secretory bodies ; 

 (1) a resinous copal formed in special receptacles scattered over different 

 parts of the plants ; (2) a tanno-glucose (kino) produced in well differ- 

 entiated special cells. 



In D. odorata the sequence of development of this double series of 

 secretory organs is as follows : The receptacles containing copal are 

 formed first, the special cells producing tanno-glucose being differentiated 

 at a later stage. 



Depending on the relative number of the two kinds of secretory organs 

 present, it is possible to recognise from what portion of the plant a given 

 fragment has been obtained. 



In the stem the copal receptacles are very few in number and confined 

 to the primary and secondary cortex, whereas the cells containing kino, 

 owing to their abundance, are of great importance physiologically and 

 anatomically. 



In the ovary, and afterwards in the fruit, the above order is reversed. 

 The copal receptacles are most numerous and active, and are mostly 

 localised in the mesocarp, whereas the special cells containing kino present 

 in the same organ are few in number and of secondary importance. 



From an examination of herbarium material the author finds that the 

 two series of excretory organs are constantly present, and arranged in 

 a characteristic manner in the different species of the genus. — G. M. 



Diseases Of Plants. By N. A. Cobb {Agr. Gaz. N.S.W. pp. 627-652, 

 July 1903 ; pp. 681-712, August 1903 ; pp. 955-986, October 1903).— This 

 article is based upon extracts from letters written in reply to requests for 

 information on the subject, or some special branch of it, or from notes 

 made during investigations undertaken in response to such requests. The 

 drawings, both coloured and plain, have been made with unusual care, and 

 may be relied upon as picturing with great fidelity the objects from which 

 they were made. The disease referred to in the July number is 'Ripe 

 Rot.' It shows that the ' Ripe Rot ' or Glmosporium of Apple will grow 

 on many other fruits. The article deals with the concentric arrangement 

 of the pustules ; description of the various inoculation experiments ; ' Ripe 

 Rot ' fungi found growing naturally, and remedies for ' Ripe Rot.' The 

 notes in the other numbers deal with the 1 Banana Scab ' and remedies ; 

 1 Stigmonose ' ; 1 Shot-hole Stigmonose ' ; ' Mouldy Core ' of the Apple ; 

 ' Quince Rots ' and remedies ; ' Black Rot ' or Altemaria of the Quince ; 

 ' Canker ' ; 1 Peach-curl' and its remedies and preventives ; Altemaria of the 

 Citrus tribe ; 1 Melanose ' on Oranges and Lemons ; ' Black Spot ' of the 

 Citrus fruits ; Lemons decaying while on the market ; diseases of the 

 Passion Vine ; faulty leaves on the Passion Vine ; Macrosporium of the 

 Passion Vine ; Pleospora on Passion Vines ; a Ripe Rot fungus on Passion 

 Vines ; diseases of the Walnut ; Leaf-curl of the Potato ; disease of 

 Chillies ; Onion disease ; Root Rots and Timber Rots ; disease in seed 

 Potatos.— H. G. C. 



Dodder (Cuscuta), Notes on. By W. Kinzel (Nat. Zeit. Land-Forst. 

 i. pp. 104-110, and pp. 177-180 ; 1903).— Clover Dodder and most of the 



