224 PUCCINIA 



Distribution: Central and Northern Europe 3 Siberia, 

 North A liu'iica. 



M4. Puccinia Oxyriae Fckl. 



Puccinia O.i-i/n'ai' Fckl. Symb. Nacht. iii. 14. Cooke, Grevillea, xi. 1">. 

 Plowr. Ured. |i. L94. Sacc. Syll. vii. 642. Sydow, Monogr. i. 567. 

 Fischer, [Jred. Schweiz, p. 135, f. 102. 



('ri'dnspures. Sori araphigenous, generally hypophyllous, 

 on minute purplish spots, scattered or aggregated, rounded, 

 sometimes confluent, surrounded by the cleft epidermis, cinna- 

 mon ; spores globose to ovate, delicately echinulate, yellow- 

 brown, 23—30 x 20—26 p. 



Fig. 172. P. Oxyriae. Teleutospores (from a Swiss specimen). 



Teleutospores. Sori on the leaves similar, but also on the 

 petioles and peduncles and then elongated, pulverulent, black- 

 brown; spores oblong to obovate, rounded and slightly thick- 

 ened or hooded above, constricted, generally rounded below, 

 marked in the upper part with little unevennesses, almost as if 

 corroded, brown, 30 — 46x15 — 25 /x: pedicels nearly hyaline, 

 deciduous, rather long. 



On Oxyria digyna (reniformis). Rare ; Skye (Buchanan 

 White), Braemar (Prof. Trail). August. (Fig. 172.) 



The teleutospores were described by the older authors as smooth ; but, 

 as Lagerheim first pointed out, they are really provided with faintly 

 perceptible markings, especially visible towards the summit. 



Distribution : Switzerland, Norway, Iceland, Colorado. 



