48 One Thousand Objects 



338. ELEGANT HENDERSONIA (Hendersonia elegans). 

 Found on dead reeds in the spring. The pores are large, 

 and have many divisions. At first enclosed in a perithe- 

 cium, whence they escape as in Diplodia ; but the spores 

 are more attractive. 



339. BIRCH HENDERSONIA (Hendersonia polycystis\ 

 On dead birch twigs. The perithecia are concealed 

 beneath the bark, which they elevate and ultimately 

 perforate. The spores are many-celled, often divided 

 longitudinally. (PI. V., fig. 36.) 



340. CORNEL HENDERSONIA (Hendersonia Cornt). 

 Wifh smaller spores divided by three septa. It is com- 

 mon on dead twigs of cornel in spring, and the spores 

 are profuse. (PI. V., fig. 49.) Other species occur on 

 plane twigs, bramble, and various plants, differing chiefly 

 in the size of the spores and the number of their septa. 



341. ELM SEPTORIA (Se.ptoria Ulmi). Fading leaves 

 in autumn are subject to parasites, which appear as very 

 minute black points or dots, often scattered over a pale 

 or discoloured spot. These are the delicate perithecia of 

 some species of Septoria, few of which possess any attrac- 

 tive features : the Septoria of the elm is one of the best. 

 The spores, when mature ooze out in dirty white spots on 

 the underside of the leaves. They are colourless, elon- 

 gated, curved, and divided by three septa. 



342. GRASS BRISTLE-CUPS (Diiieinasporium graminuni). 

 The leaves and culms of dead grass have often bristly 

 little black cups breaking through the cuticle, which are 

 in themselves interesting objects. These contain spores, 

 slightly curved, with an awn or bristle at each extremity. 

 (PI. V., fig. 41.) An allied species, with cups double the 

 size, is found on rotten nettle stems. 



343. COMMON TORULA (Torula hcrbarnm}. Old nettle 

 stems have often large black sooty patches upon them, 

 an inch or two in length. They consist of a number of 

 roundish or oval dark-coloured spores, attached end to end. 



344. COMPACT TORULA (Torula hysterioides). A less 

 common species, with the spores closely compressed so 

 as to appear like jointed threads, which also adhere to* 



