Part -2;-1907] ‘UREDINACEAE "105 
ous; urediniospores obovate, 20-24 by 27-35; wall golden-yellow, medium thick, 2-2.5 p, 
much thicker above, 5-84, evenly and strongly echinulate,’ pofes apparently equatorial, 
few, obscure. 
III. Telia amphigenous, scattered, irregularly orbicular, confluent, 0.5-1 mm. across, 
very slightly elevated,, indehiscent, dirty-brown; teliospores united in a compact mass, 
appearing obscurely catenulate, with 2-4 cells in a series, each spore elliptical or cuboidal, 
10-15 by 18-35 #, outermost but slightly longer ; wall smooth, cinnamon-brown, 2-3 « thick, 
apical wall of outer spores 7-9 z. 
On EUPHORBIACEAE : 
Croton calvescens S. Wats., Michoacan. 
Croton sp., San Luis Potosi. : 
Type collected at Cardenas, Mexico, on Crofon sp., October 22, 1898, E. W. D. Holway 3144. 
DISTRIBUTION: Central Mexico. 
4. PUCCINIASTRUM Otth, Mitth. Nat. Ges. Bern 1861: 71. 1861. 
Phragmopsora Magn. Hedwigia 14: 123. 1875. 
Thekopsora Magn. Hedwigia 14: 123. 1875. 
Cycle of development includes pycnia, aecia, uredinia and telia, with distinct alter- 
nating phases; heteroecious. Pycnia subcuticular, uredinia subepidermal, telia within or 
below the epidermis. 
Pycnia subcuticular, low-conoidal, without ostiolar filaments. 
Aecia erumpent, cylindrical. Peridium delicate, verrucose on inner surface. Aecio- 
spores ellipsoid, verrucose except one side which is thinner and smooth. 
Uredinia barely protruding through the epidermis, dehiscent by a central pore. Peri- 
dium hemispherical, delicate, cells longer at orifice. Urediniospores borne singly on pedi- 
cels, obovate to ellipsoid; wall colorless, echinulate, pores indistinct. 
Telia indehiscent, forming more or less evident layers in the epidermal cells, or imme- 
uiately beneath the epidermis. Teliospores oblong or prismatic, two to four-celled by 
vertical partitions in two planes; wall smooth, colored. 
Type species, Pucciniastrum Epilobii Otth. (on Epilobium angustifolium). 
Telia and uredinia inhabiting mon-cotyledonous hosts (Orchidaceae). 1. PB. Goodyerae. 
Telia and uredinia inhabiting dicotyledonous hosts. 
Host belonging to family Hydrangeaceae. 2. P. Hydrangeae, 
Host belonging to family Rosaceae. 
Urediniospores broadly obovate. 3. PB. Agrimoniae, 
. BP arcticum, 
. PB. pusiulatum. 
. P. Pyrolae. 
Urediniospores narrowly obovate. 
Host helonging to family Onagraceae. 
Host belonging to family Pyrolaceae. 
Host belonging to family Ericaceae. 
Urediniospores clavate-oblong. 
Urediniospores obovate-oblong. 
Host belonging to family Vacciniaceae. 
. BP. sparsum, 
. P. minimum. 
PP. Myrtiih, 
WOOn AME 
1. Pucciniastrum Goodyerae (Tranz.) Arthur. 
Uredo Goodyerae Tranz. Trudi S. Peterb. Obshch. Est. Otd. Bot. 23: 28. 1893. 
O and I. Pycnia and aecia unknown. 
II. Uredinia amphigenous, pustular, indefinitely scattered, round, 0.2-0.4 mm. across, 
dehiscent by central pore; peridium hemispherical, firm, cells large, elongated vertically, 
walls thin, 2, gradually thickened below toward the orifice, smooth, ostiolar cells 35-40 u 
high, greatly thickened below, finely echinulate above; urediniospores oblong-clavate or 
obovate, 13-19 by 26-36 #; wall thin, 24, pale-yellow, finely echinulate. 
III. Telia unknown. 
CHIDACEAE : Paes : ; 
oe per Menziesit (Lindl,) Morong (Goodyera Menziesit Lindl.), California, Colorado, 
Washington. ; 
TYPE LOCALITY : Levashov near St. Petersburg, Russia, on Goodyera repens. : 
DISTRIBUTION : Colorado to northern Califor.ia and northward; also in European Russia. 
ExsiccaT1: Sydow, Ured. 1798. 
