438 NORTH AMERICAN FLORA [VoLuME 7 
O. Pycnia amphigenous, often gregarious among or opposite the aecia, inconspicuous, 
immersed, honey-yellow becoming brownish, globoid, 128-160» wide by 112-144» deep; 
ostiolar filaments short or wanting. 
I. Aecia hypophyllous or petiolicolous, gregarious in small groups, often with uredinia 
and telia, globoid, 0.3-0.5 mm. in diameter; peridium absent, but the epidermis arched over 
and opening at the center; aeciospores globoid, ellipsoid, or angular, 16-24 by 21-33 4; wall 
pale-yellow or colorless, rather thin, 1-2 yu, finely and inconspicuously verrucose. 
II. Uredinia hypophyllous, sometimes amphigenous and petiolicolous, scattered or 
gregarious in groups with aecia or telia, sometimes in circular groups, roundish or oval, 0.2~1 
by 0.2-1.5 mm., rather early naked, pulverulent, yellowish or golden-brown, ruptured epidermis 
evident; urediniospores globoid or ellipsoid, 20-27 by 23-31 4; wall yellowish or very light 
chestnut-brown, rather thick, 1.5~-3 4, moderately echinulate, the pores not constant, 2-5, 
usually scattered, sometimes equatorial. 
Ill. Telia amphigenous or petiolicolous, many, scattered or in groups, roundish, oval, or 
irregular, 0.2-0.8 by 0.3-2 mm., early naked, pulverulent, cinnamon-brown, ruptured epiderm!s 
noticeable; teliospores ellipsoid, 20-30 by 30-43 4, rounded at both ends, rarely constricted 
at septum; wall chestnut-brown, uniformly thick, 1.5—2.5 4, moderately and finely verrucose; 
pedicel colorless, deciduous. ‘ 
ON -CICHORIACEAE: 
Nabalus albus (L,.) Hook. (Prenanthes alba 1,.), Indiana, Maine, Massachusetts, Michigan, 
w York. 
Nabalus altissimus (L.) Hook. (Prenanthes altissima L,.), Massachusetts, New York, Ohio, 
Pennsylvania, Vermont, West Virginia; Nova Scotia. 
Nabalus Boottii DC. (Prenanthes Boottti A. Gray), New Hampshire. 
Nabalus racemosus (Michx.) DC. (Prenanthes racemosa Michx.), Saskatchewan. 
Nabalus trifoliolatus Cass. (Prenanthes trifoliolatae Fernald), Massachusetts, New York; 
Quebec. 
Nabalus sp., Delaware; Newfoundland; Ontario. 
TYPE LOCALITY: ‘Buffalo, New York, on N. abalus sp. 
DISTRIBUTION: Newfoundland to Saskatchewan, and southward to Indiana and West Virginia. 
ILLUSTRATION: Sydow, Monog. Ured. 1: 127, f. 106. 
Exsiccatt: Ellis, N. Am. Fungi 263; Ellis & Ev. Fungi Columb. 1381a. 
266. Dicaeoma insperatum (H. S. Jackson) Arthur. 
Puccinia insperata H. S. Jackson, Brooklyn Bot. Gard. Mem. 1: 253. 1918. 
O. Pycnia not seen. 
J. Aecia chiefly hypophyllous and petiolicolous, in crowded groups on yellowish spots 
2-3 mm. across, cupulate, 0.2-0.3 mm. broad; peridium whitish, the margin recurved, lacerate; 
peridial cells rhombic, 19-27 by 35-45 uw, overlapping, the outer wall 1-1.5 uw thick, the inner 
wall 3-4 » thick, verrucose; aeciospores globoid or broadly ellipsoid, 15- > by 19-23 n; wall 
colorless, 1-1.5 » thick, finely and closely verrucose. 
II. Uredinia amphigenous, scattered, round, 0.2-0.5 mm. across, tardily naked, pulveru- 
lent, cinnamon-brown, ruptured epidermis conspicuous; urediniospores broadly ellipsoid, 
occasionally obovoid, 19-21 by 23-29 u; wall cinnamon-brown, 1.5-2 » thick, minutely and 
closely echinulate, the pores 2 or 3, equatorial or somewhat scattered. 
Ill. Telia amphigenous and petiolicolous, scattered, round, 0.2-0.8 mm. across, tardily 
naked, bullate, pulverulent, blackish-brown, ruptured epidermis conspicuous; teliospores 
ellipsoid or broadly obovoid, occasionally somewhat irregular, 16-20 by 23-32 uw, rounded at 
both ends, scarcely or not at all constricted at septum; wall chestnut-brown, 1.5-2 » thick, 
oceasionally thickened up to 3 » above, moderately and inconspicuously verrucose, appearing 
smooth when wet; pedicel colorless, deciduous. 
On CICHORIACEAE: 
Nabalus hastatus (Less.) A. Heller, Alaska, Oregon. 
TYPE LOCALITY: Road to Lost Lake, Hood River Valley, Oregon, on Nabalus hastatus. 
DISTRIBUTION: Oregon and southeastern Alaska. 
267. Dicaeoma hemisphaericum (Peck) Arth. 
Résult. Sci. Congr. Bot. Vienne 344, 1906. 
Accidium hemisphaericum Peck, Bot. Gaz. 3:34. 1878. 
Puccinia minussensis Thiu. Bull. Soc. Nat. Mose. 53: 214. 1878. 
