12 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



which are cylindrical, curved, and rounded at the ends (16-18 x 3-4 fj), 

 and of these ei^ht are produced together in a membranous sac or aseus. 

 This m; ture condition is only arrived at after hibernation, and con- 

 sequently upon dead branches, but the early stage is clearly parasitic and 

 may become troublesome. The mature stage is called Valsa ambicns. 



Certainly whenever seen oozing out of living trees the parts should 

 be well rinsed with Bordeaux mixture, so as to destroy all the germinating 

 power of the conidia. 



Sacc. Syll, i. 512; Cooke Hdbk. No. 2475; Gurr. Linn. Trans, xxii. 

 t. 48, f. 138. 



Peak-leaf Cluster-cups. 

 Bastelia canccllata (Reb.), PI. X. fig. 8. 



There is hardly any parasite which appears to be such a puzzle to 

 gardeners as the Bojstelia or " cluster-cups " of the Pear leaves. They 



Fiu. 5. — Peak-leaf Clubteb-cup. 



A fungus growing on two different kinds of plant at different periods of its 



life-cycle. 



1. The spring stage of the fungus on a living Juniper branch, reduced in size. 

 _'. Spurt' of same, < 300. 3,4. " Cluster-cup," or summer form of fungus 

 fruit on living Pear leaves, reduced in size. 5. Two cluster-cups, one cut 

 open, slightly x . 0. Spores of cluster-cup condition, x 300. 



base al o been a puzzle to others who are not gardeners, as evidenced 

 by the literature of the past quarter of a century. We can permit the 

 discussion to rest and state a few conclusions. 



The parasite thickens the Pear leaves at the infected spots by the 

 internal growth of the mycelium upon this, and externally are produced 

 a small cluster of flask-shaped pale brown bodies called pcridia, and these 

 are omi q»lit len-tliwis* nearly to the base into thread-like filaments 

 which are for a Ion- tunc united together at the apex. The contents of 

 these flask-shaped bodies are the acidiospores, which are nearly globose 



