526 NORTH AMERICAN FLORA [VoLUME 7 
ruptured epidermis inconspictious; teliospores ellipsoid, 23-26 by 32-40», rounded at both 
ends, slightly constricted at septum, the two cells readily falling apart by splitting of septum; 
wall golden- or chestnut-brown, thick, 2-3.5 4, with a pale subcuticular layer extending through 
the septum, best seen in lactic acid, sometimes slightly thickened at apex, 5-6», smooth; 
pedicel colorless, up to three times length of spore. 
This species is correlated with Dicacoma Eurotiae (Ellis & Ev.) Arth., the telial characters 
of the two species being essentially the same, notably in the unique manner of cell-disjunction, 
as well as the host of the short-cycled form being the same as the aecial host of the heteroecious 
form. This agreement doubtless indicates a common origin for the two species. 
On CHENOPODIACEAE: 
Eurotia lanata (Pursh) Mogq., Nevada. 
Tyre Locality: Near Lovelocks, Nevada, on Eurotia lanata. 
DisTrRiBUTION: Known only from the type locality. 
7. Micropuccinia agnita (Arth.) Arthur & Jackson. 
Puccinia agnita Arth. Bull. Torrey Club 42: 590. 1915. 
O. Pycnia chiefly epiphyllous, loosely grouped on discolored spots, punctiform, noticeable, 
angularly globoid, 65-115 » in diameter; ostiolar filaments about 35 yu long. 
IIl. Telia chiefly hypophyllous, irregularly grouped on pale spots 4-6 mm. across, round 
or oblong, 0.2-0.8 mm. across, at first covered by the membranous epidermis, soon naked, very 
pulvertilent, light chestnut-brown; teliospores ellipsoid, 21-27 by 29-42 », rounded or obtusé 
at both ends, slightly or not constricted at septum; wall golden-brown, 1.5—2 u thick, thickened 
over the pores into a colorless papilla, 5-64, rather inconspicuously verrucose, the pore of 
upper cell apical, of lower cell depressed two-thirds; pedicel colorless, fragile. 
This species is correlated with Allodus claytoniata (Schw.) Arth., the telial characters of 
the two species being essentially alike, and the family of the known host of the short-cycled 
form being the same as that of the hosts of the long-cycled form. 
On PORTULACACEAE: 
Claytonia megarrhiza (A. Gray) Parry, Colorado. 
Tyre Locatity: Cumberland Mine, LaPlata Mountains, Colorado, on Claytonia megarrhiza. 
DISTRIBUTION: Known only from the type locality. 
8. Micropuccinia detonsa (Arth. & Holway) Arthur & Jackson. 
Puccinia detonsa Arth. & Holway; Arth, Mycologia 10: 130, 1918. 
O. Pycnia unknown. 
III. Telia hypophyllous and caulicolous, more or less confluent in round or elongate 
masses 1-2 mm. across, or sometimes scattered, on indefinite discolored areas, round, 0.3~0.6 
mm. in diameter, early naked, pulvinate, light yellowish-brown, ruptured epidermis incon- 
spicuous; teliospores oblong or fusiform-oblong, 12-15 by 30-40 yu, rounded or acute at apex, 
more or less narrowed below, somewhat constricted at septum; wall pale golden-brown, 
very thin, |» or less, not or a little thickened above, up to 3 4, smooth; pedicel colorless, 
about as long as spore. 
ON CARYOPHYLLACEAE: 
Stellaria ovata Willd., Costa Rica; Guatemala. 
TYPE LocaLity: San José, Costa Rica, on Stellaria ovata. 
DisTRIBUTION: Central America. 
9. Micropuccinia Arenariae (Schum.) Arth. & Jackson; Arth. 
Bull. Torrey Club 48: 40. 1921. 
Uredo Arenariae Schum. Enum. Pl. Saell. 2: 232. 1803. 
Uredo Alsines Schum. Enum. Pl. Saell. 2: 232. 1803. 
Puccinia Spergulae DC. Fl. Fr. 2: 219. 1805. 
Puccinia Dianthae DC. Fl. Fr. 2:220. 1805. 
Puccinia Lychnites DC.; Poir.in Lam. Encyc. 8: 247. 1808. 
Uredo verrucosa Strauss, Ann. Wett. Ges. 2: 107. 1810. 
Puccinia Saginae Schmidt & Kunze, Deuts. Schwamme 9: 6. . 1819. 
Puccinia Spergulae Arenariae-serpyllifoliae DC. Fl. Fr. 6:55. 1815. 
Puccinia Lychnidearum Link. Ges. Nat. Freunde Berlin Mag. 7:25. 1815. 
Puccinia crassa Link, Ges. Nat. Freunde Berlin Mag, 7:30. 1815. 
Caeoma verrucosum Nees, Syst. Pilze Schw. 16. 1816. 
Dicaeoma verrucosum Mart. Fl. Crypt. Erlang. 321. 1817. 
