(463) 



> chestnut-brown, 1.5-3M thick; pores 2 in each cell, 

 near the septum. 



For the aecia: Cotoneaster tomentosa Lindl., C. vulgaris Lindl., 

 Cydonia vulgaris (L.) Pers., Crataegus orientalis Lindl., C. 

 oxyacantha L., C. grandiflora Koch., C. pinnatifida Bunge, 

 C. tanacetifolia Pers., C. monogyna Jacq., Mespilus ger- 

 manica L., Pyrus communis L., 

 For the telia: Juniperus Sabina L., /. virginiana L. 

 Type locality: Brussels, Belgium, on Mespilus germanica. 

 Distribution: Europe and Central Asia. 



Illustrations : Beitr. Krypt. Schweiz 2 2 : /. 276; Hedwigia 34 : 

 3)/- 5; Tubeuf, Pflanzenkr. /. 207-213. 



Exsiccati: Sydow, Ured. 134, 148, 149, 199, 292, 293, 294, 29s, 

 $39, %9 2 -> &93, 947i 2046, 2047; Krieger, Fungi Sax. 361; Sydow, 

 Myc. Mar. 1429, 1703, 1904, 2648, 2649, 2921, 2922, 3812, 4125, 

 4229; Roum. Fungi Gall. 3419, 3863; Thiim. Myc. Univ. 1429; 

 Rab. Fungi Eur. 1985; Briosi & Cavara, Funghi Paras. 288, 319. 



29. Gymnosporangium transformans (Ellis) 

 Roestelia transformans Ellis; Peck. Bull. Torrey Club 5:3. 1874. 

 Aecidium transformans Pazschke, in Rab. Fungi Eur. 4238. 1901. 

 Aecia hypophyllous, caulicolous, and fruiticolous, occasionally 

 solitary, usually gregarious, sometimes few together but more often 

 aggregated in large groups, borne in gall-like, frustum-shaped protu- 

 berances (1-2 mm. high) of a reddish 



solidated at the bases when in groups, 

 at first cylindrical, 2-2.5 mm - high by 

 0.2-0.4 mm. in diameter; peridiumsoon 

 becoming finely fimbriate to base, par- 

 tially dropping away, remainder spread- 

 ing and twisted; peridial cells usually 

 seen only in side view, very long and 

 narrow, becoming curved or even coiled 

 when wet, 12-18/i thick by 150-300/z 

 or more long (shorter toward apex of 



peridium), outer wall 2-3 y. thick, Mg. 25. G. transformans. 



smooth, inner wall 4-6^ thick, rather 



coarsely verrucose, side walls verrucose on inner half with round- 

 ish or somewhat irregular papillae; aeciospores globose, small, 18- 

 22;t in diameter, wall light cinnamon-brown, 1.5-2.5/* thick, rather 



