216 



Mycologia 



Caeoma Lysimachiae Schlecht. Fl. Berol. 2: 113. 1824. 

 Caeoma lysimachiatum Link, in Willd. Sp. PL 6^:45. l & 2 5- 

 Aecidium Lysimachiae Schlecht.; Wallr. Fl. Crypt. Germ. 2:252. 

 1833- 



Puccinia Limosae Magn. Amtl. Ber. Vers. Deutsch. Naturf. u. 



Aerzte 1877:200. 1877. 

 Dicaeoma Lysimachiae Kuntze, Rev. Gen. 3 3 : 467. 1898. 



O & I. Pycnia and aecia on Lysimachia spp. (Cultures in 

 Europe but not yet made with North American material.) 



II. Urediniospores broadly ellipsoid or obovoid, 17-19 X 20- 

 25 fx; wall cinnamon-brown, 1.5-2 fx thick, evenly and rather 

 sparsely echinulate, the pores 3 or 4, equatorial. 



III. Teliospores oblong or oblong-clavate, 15-19 X 32-45 

 rounded or truncate at the apex, usually narrowed below, slightly 

 constricted at the septum ;, wall dark chestnut-brown, somewhat 

 paler below, 1-1.5^ thick, much thicker above, 7-107*; pedicel 

 light yellow or nearly colorless, about three-fourths length of 

 spore. 



On Carex arcta, atratiformis brunnescens, limosa. 



Distribution : Vermont, Connecticut, and Delaware west to 

 Wisconsin, Nebraska, and Illinois ; also in Europe. 



Exsiccati: Barth, Fungi Columb. 3848, 4153, 5064 — 4152; 

 Ellis & Ev. N. Am. Fungi, 2404. 



Cultures in Europe by Magnus (1877) and by Klebahn (Jahrb. 

 f . wissenschaft. Bot. 34 : 396, 1900) have established a connection 

 there between a Puccinia on Carex limosa and an aecidium on 

 Lysimachia. The American specimens here included agree per- 

 fectly with the European specimens and are included on the 

 grounds of morphological similarity, even in spite of one negative 

 attempt to make a culture from C. limosa on Lysimachia. Strong 

 field evidence both from Dearness in Ontario and Bates in Ne- 

 braska support the connection. These aecia on Lysimachia are 

 undoubtedly distinct from those on Steironema which are asso- 

 ciated with telial forms on the grass Spartina. The aecia have 

 been collected more frequently than the telia. 



8. Puccinia Grossulariae (Schum.) Lagerh. Ured. Herb. Fries. 



60. 1895 



Aecidium Rumicis /? Grossulariae Pers. Synop. Fung. 207. 1801. 

 Aecidium Grossulariae Schum. PI. Saell. 2:223. 1803. 



