Observations on some Scottish Uredineae and Ustilagineae 143 



elaiinum Alb. et Schweiii.) is easily distinguished on account of 

 the formation of a "\^itches' broom." In Calyptospora Goep- 

 pertiana Kiihn {Aecidium columnare Wh. et Schwein.) the aecidio- 

 spores are small (21-30 x 14-18/x). In Pucciniastriim piisfulatum 

 Diet, there is a distinct smooth line dowTi the aecidiospore. The 

 aecidiospores of Melampsorella Symphyti Bub. and A. pseudo- 

 coliimnare are about similar in size but the latter, according to 

 Kiihn {Hedu-. xxiv, 1SS5. p. loS) are white and very irregular in 

 shape and size ; the warting is as\Tnmetrical and at certain spots, 

 especially towards the end of thespore, maybe altogetherwanting. 



In the Scottish specimens the attacked leaves are scattered 

 sparingly over the shoots and can be easily distinguished bv their 

 pale green colour. The aecidia are borne in two rows on the under 

 side of the leaf, the number in each row var\'ing from 3-9. 

 No spemiagonia are present. The pseudo-peridia are cvhndncal 

 up to i'5 mm. high and -4 mm. \\-ide, \\'ith irregularly torn 

 opening. The spores are strikingly white, very irregular in form 

 and size, 27-47 x 21-30 /i averaging 35-5 x zy^fi. The dis- 

 tribution of warts is irregular but they are not entirel}^ absent 

 over any part of the spore wall. 



Ae. pseiido-columnare has apparently been onlv once preWously 

 found in Great Britain — by ^lunro at L\Tne Regis on Abies 

 Pectitiata, Xordmanniana, amabilis and cephalonica as recorded 

 by Plo\Might [British Uredineae and Ustilagineae. p. 271). It 

 appears to be very uncommon on the continent. Klebahn [Zeits. 

 f. Pfianzenkr. xxvi, I9i6,p. 257) has obtained aecidia apparently 

 identical with Ae. pseiido-cohimnare by infecting A. pectinata 

 with Milesina Blechni. 



The specimens were received through the headquarters of the 

 Forestry Commission in Scotland. 



USTILAGO BiSTORTARUM Kom. 



On the leaves of Polygonum viviparum L. Meall nan Tar- 

 machan, Perthshire, alt. 3000 ft. 



This is the form which produces swollen pustules on the leaves. 

 The spores are 12-16 /x in diam. and are minutely granulated. 

 It therefore does not agree with the var. glabra described on this 

 host by Rostrup in Finmark, Norway, which possesses smooth 

 spores 12-13 /^ ii^ diam. 



Sphacelotheca ixflorescentiae Trel. 



In the bulbils of Polygonum viviparum L. Ben Lui, June 1914, 

 and Ben Ledi, June 1921, Perthshire. 



ScheUenberg [Ann. Mycol. v, 1907, p. 3S5) has separated this 

 species from 5. Hydropiperis on account of differences in the 

 structure of the capsule and spores. The mycehum is perennial 



