584 NORTH AMERICAN FLORA [Volume 7 
narrowed below, slightly constricted at septum; wall colorless to very light golden-yellow, 
1~1.5 u thick, thickened to 5-9 u at apex, smooth; pedicel colorless, less than length of spore. 
ON CaRDUACEAE: 
Schistocarpha platyphylla Greenman, Guatemala. 
TYPE Locality: San Rafael, Dept. Guatemala, Guatemala, on Schistocarpha platyphylla. 
DistrrpuTIon: Guatemala. 
144, Micropuccinia Emiliae (P. Henn.) Arthur & Jackson. 
Puccinia Emiliae P. Henn. Hedwigia 37: 278. 1898. 
Dasyspora Emiliae Arth. Résult. Sci. Congr. Bot. Vienne 346. 1906. 
O. Pycnia unknown, probably not formed. 
IiI. Telia hypophyllous, occasionally amphigenous, crowded and somewhat confluent in 
orbicular groups 1-5 mm. across, on discolored spots, small, round, 0.2-0.5 mm. in diameter 
eatly naked, compact, chestnut-brown, becoming cinereous by germination, ruptured epi- 
dermis usually noticeable; teliospores oblong-clavate, 14-20 by 35-55 », rounded or obtuse 
above, obtuse or narrowed below, slightly or not constricted at septum; wall cinnamon- 
or chestnut-brown, paler below, thin, 1-2 u, thickened at apex, 4-10 u, smooth; pedicel color- 
less, or more commonly tinted, half length of spore or shorter. 
On CARDUACEAE: 
Calendula officinalis L,. (cult.), Illinois, Indiana, Nebraska; Cuba. 
Dimor photheca cuneata (Thunb.) DC. (cult.), Indiana, Nebraska. 
Emilia sagittata (Vahl) DC., Jamaica. : 
Emilia sonchifolia (L) DC., Florida; Antigua; Barbados; Cuba; Grenada; Jamaica; 
Martinique; Porto Rico. 
Neurolaena lobata (L,.) R. Br., Costa Rica; Panama; Cuba; Porto Rico. 
TYPE LOCALITY: Jamaica, on Emilia sagittata. 
DISTRIBUTION: Southern Florida southward through the West Indies, and in cultivation from 
Nebraska to Indiana. 
ILLusrrRarion: Sydow, Monog. Ured. 1: pl. 4, f. 64. 
Exsrccatr: Barth. N. Am. Ured. 1863. 
145. Micropuccinia recedens (Sydow) Arth. & Jackson; Arth. 
Bull. Torrey Club 48: 41. 1921. 
Puccinia recedens Sydow, Monog. Ured. 1: 146. 1902. 
Dasyspora recedens Arth. Résult. Sci. Congr. Bot. Vienne 347. 1906. 
O. Pycnia unknown, probably not formed. 
III. Telia hypophyllous, less commonly epiphyllous, densely gregarious and often more 
or less confluent in groups 4-8 mm. across, on discolored spots, small, round, 0.2-0.5 mm. 
in diameter, early naked, compact, pulvinate, cinnamon- or chestnut-brown, becoming cinere- 
ous by germination, ruptured epidermis at first noticeable; teliospores oblong or clavate, 
14-22 by 32-48 uw, rounded or obtuse above, narrowed below, usually noticeably constricted 
at septum; wall light cinnamon-brown, 1.5—-2.5 » thick, broadly thickened above, 6-10 pz, 
smooth; pedicel delicate, colorless or slightly tinted, one half length of spore; mesospores 
occasiqnally intermixed. 
This species is correlated with Dicaeoma Eriophori (Thiim.) Kuntze, the telial characters 
being essentially the same, and the hosts of the short-cycled form corresponding to aecial 
hosts of the heteroecious form. This agreement doubtless indicates 4 common origin for 
the two species. 
On CaARDUACEAE: 
Senecio aureus I,., Delaware, Michigan, New Jersey, New York, Pennsylvania, West 
Virginia, Wisconsin. 
Senecio Balsamitae Muhl., Alberta. 
Senecio crocatus Rydb., Wyoming. 
Senecio Harfordii Greenm., Oregon. 
Senecio pseudaureus Rydb., Idaho, Montana. 
TYPE LocaLity: Ann Arbor, Michigan, on Senecio [aureus]. 
DISTRIBUTION: West Virginia and southern New York to the mountains of Oregon and Alberta. 
ae ory elas Bull. Lab. Nat. Hist. Univ. Iowa 3?: pl. 2, f. 11¢; Sydow, Monog. Ured. 1: 
pl. 8, f. 124, 
Exsiccati: Arth. & Holway, Ured. Exs. Ic. J1c; Barth. N. Am. Ured. 1568 ,2632. 
