North American Species of Puccinia on Carex 231 



mon-brown, 1.5-2.5 /x thick, finely verrucose, the pores 2 slightly 

 below the equator ; pedicel colorless, semi-persistent, once or 

 twice length of spore, 



III. Teliospores clavate-oblong, 16-21 X 32-56 usually 

 rounded above, narrowed or rounded below, slightly constricted; 

 wall light chestnut-brown 1-1.5/* thick, much thicker above, 5- 

 10 /x; pedicel nearly colorless, length of spore or less. 



On Carex stricta. 



Distribution : Northeastern states from Massachusetts to New 

 York and Delaware. 



Exsiccati: Barth. N. Am. Ured. iojj ; Thiim. Myc. Univ. 746. 



An interesting species on account of the presence of amphi- 

 spores. The amphispores agree with the urediniospores in the 

 arrangement of the pores but differ in being darker colored, in 

 having verrucose instead of echinulate markings, and semi-per- 

 sistent pedicels. Several collections without amphispores might 

 be included based on the characters of the uredinial and telial 

 stages but not without some uncertainty. A specimen from Con- 

 necticut and another from New York, both on C. stricta, with 

 only urediniospores and teliospores, doubtless belong here but a 

 specimen from Mississippi on C. lacustris has not been included. 

 In spite of an essential agreement in urediniospore characters the 

 geographical distribution, host relations, and lack of amphispores 

 makes the situation too uncertain to list this host. The amphi- 

 sporic collections are all on Carex stricta and are from the fol- 

 lowing localities : Seaford, Del., Jackson; Saratoga County and 

 Albany, N. Y., Peck; Wellesley-, Mass., Seymour ; Southold, N. 

 Y., Latham, Peck's original name Uromyces Caricis was based 

 upon his error of taking amphispores to be one-celled teliospores. 



19. Puccinia karelica Tranz. Acad. Sci. St. Petersburg Bot. 2 : 



16. 1904 



?Aecidium Trientalis Tranz. ; Gobi & Tranz. in Scripta Bot. Hort. 

 Imp. Petrop. 3:116. 1891. 



O & I. Pycnia and aecia on Trientalis sp. (Cultures in 

 Europe but not yet made with North American material although 

 supported by field evidence.) 



II. Urediniospores globoid or broadly ellipsoid, 16-19 X 20- 

 24 fx; wall cinnamon-brown, 2-2.5^ thick, finely and moderately 

 echinulate, the pores 3-5, scattered. 



