PESTS OF THE FLOWER GARDEN. 



31 



escape through the fissured cuticle. At length the cuticle about the 

 orifice turns pallid, and appears as a pale dot on the purple spots. 



No remedies have been tried, but it would be advisable to apply 

 diluted Bordeaux mixture, so as to destroy the extruded sporules, and to 

 pick off as many of the diseased leaves as possible. 



Observed since the plates were in press, and hence too late for illus- 

 tration here. 



Septate-Carnation Anthracnose. 

 Marsonia Delastrei (Be Laer.), PI. II. fig. 32. 



We venture to include here references and descriptions of another 

 of those destructive forms of disease which is. called in America " An- 

 thracnose," although there was no record of a British species until the 

 immediately preceding species was discovered as this description was going 

 to press. They form spots on leaves and stems, but there are no definite 

 receptacles, only cells or cavities in the substance, which are covered by 

 the cuticle. The sporules are formed in these cavities, and are liberated 

 by the rupture of the cuticle. 



The spots on the leaves of Lychnis are tawny and without definite 

 margin. The sunken cells are scattered over these spots. The sporules 

 are narrowly club-shaped, rounded at the apex, and attenuated towards 

 the base. They are colourless, and at first without division, but at 

 length are divided by a septum in the centre into two cells (20-25 x 

 6-7 /<), and are at first attached to long slender threads. Because of 

 the divided spores it is called Marsonia. If the spores were undivided 

 it would be Glceosporium. 



Evidently this is only a mature form of another described parasite 

 called Glceosporium Lychnidis, with which it agrees in every respect 

 except in the septation of the sporules, both occurring upon the same 

 host. 



The distribution of this species is France, Belgium, Netherlands, 

 Germany, Austria, Italy, and Siberia. 



Diseased parts should be collected and burnt. 



Sacc. Syll. iii. 3700; iv. 4035; Journ. B.H.S. 1902, p. 650, 

 PI. L, f. 4. 



A similar parasite (Cylindrosporium Saponarice) is found on the leaves 

 of Soapwort in France. The sporules are straight and cylindrical 

 (10-40 x Journ. E.H.S. 1902, p. 650, PI. EL, f. 17. 



Soapwort Smut. 

 Sorosporium saponarice (Rud.), PI. II. fig. 34. 



This smut occurs chiefly on the Continent upon the inflorescence of 

 the Soapwort, on which it has been known for half a century. Only 

 recently has it made its appearance in gardens in this country on 

 Dianthus deltoides. It attacks and destroys the reproductive organs of 

 the flowers, converting them into glomerules of spores. 



The spore masses, or glomerules (40-100 \x diam.), are rounded and 

 composed of a great number of loosely connected cells, or teleutospores, 



