448 NORTH AMERICAN FLORA [VoLuME 7 
ellipsoid or obovoid, 13-19 by 16-24 u, rounded above and below, or somewhat narrowed be- 
low; wall cinnamon- or chestnut-brown, 1.5~2 u thick, occasionally slightly thickened at apex, 
2-4 p, with a very low semi-hyaline umbo over the apical pore, very minutely and incon- 
spicuously roughened; pedicel short, broad where attached to spore, tapering, fragile, color- 
less. 
ON FABACEAE: 
Trifolium Aitonii Rydb., Montana. 
Trifolium albopurpureum T. & G., California, Oregon. 
Trifolium amplectens 'T. & G., California. 
Trifolium andinum Nutt., Wyoming. 
Trifolium bifidum A. Gray, California. 
Trifolium bifidum decipiens Greene, California. 
Trifolium Breweri S. Wats., California. 
Trifolium ciliatum Nutt. (T. ciliolatum Benth.), California. 
Trifolium dasyphyllum Torr., Colorado. 
Trifolium depauperatum Desv., California. 
Trifolium dubium Sibth., California, Oregon, Washington. 
Trifolium. eviocephalum Nutt., Oregon. 
Trifolium Fendleri Greene (T. involucratum Ortega), Colorado, Nevada. 
Trifolium gracilentum T. & G., California. 
Trifolium gymnocarpon Nutt., Arizona, Colorado. 
Trifolium Hallii Howell, Oregon. 
Trifolium Macraei Hook. & Arn., California. 
Trifolium microcephalum Pursh, California. 
Trifolium microdon Hook. & Arn., California, Oregon; British Columbia. 
Trifolium obtusiflorum Hook. (T. roscidum Greene), California. 
Trifolium oliganthum Steud. (T. pauciforum Nutt.), California, Nevada, Ore on, Uta 
British Columbia. 
Trifolium Parryi A. Gray, Colorado, Utah. 
Trifolium procumbens L,., Oregon. 
Trifolium Rydbergii Greene, Colorado, Montana. 
Trifolium scariosum A. Nelson, Utah. 
Trifolium sienophyllum Nutt., California. 
Trifolium tridentatum Lindl., California, Oregon. 
Trifolium variegatum Nutt., California, Nevada, Washington. 
Trifolium Wormskjoldii Lehm., California. 
TYPE Locatity: California, on “burr cloves,” typographical error for burr clover, 7.e., Medicago 
hispida, error for Trifolium (dubium?). 
j DISTRIBUTION: Throughout the ReCKY Mountains and along the Pacific coast; also in Europe 
and Japan. 
ILLustration: Beitr. Krypt. Schweiz 20: f. 20. 
Exsriccati: Barth. Fungi Columb. 2798, 4496; Barth. N. Am. Ured. 195, 694, 794, 1195, 1394; 
1597, 1994; Clements, Crypt. Form. Colo. 538; Ellis & Ev. N. Am. oi! 1875, 1875b, 2409; Ellis & 
Ev. Fungi Columb. J 797; Garrett, Fungi Utah. 224, 225; D. Griff. W. Am . Fungi 365; Rab.-Wint.- 
Paz. Fungi Eur. 4038; Sydow, Ured. 859, 860, 1 762. 
16. Pucciniola nerviphila Nie Arthur. 
Puccinia nerviphila Grognot, Pl. Crypt. Saéne-et-Loire 154. 
Puccinia neurophila Grognot; De-Toni, in Sacc. Syll. Fung. 7: 398, 1898, 
Dicaeoma neurophilum Kuntze, Rev. Gen. 33: 469, 1898. 
Uromyces flectens Lagerh. Sv. Bot. Tidskr. 3: 36. 1909. 
O. Pycnia hypophyllous, petiolicolous, rather numerous, usually scattered among the 
aecia, honey-yellow becoming darker, inconspicuous, globoid or oblate-sphaeroid, 80-145 yw in 
width, 65~145 « in height; ostiolar filaments in somewhat of a column up to 70 u in length. 
I. Aecia mostly hypophyllous or sometimes petiolicolous, scattered unevenly or in groups 
0.5-2 mm. in diameter, often following miid-ribs or veins, cupulate, low, 0.1-0.3 mm. in diam- 
eter; peridium pale, darkening with age, the margin slightly recurved, finely erose; peridial: 
cells oblong in radial section, 13-16 by 19~21 yw, somewhat overlapping, the outer wall 7~9 yu 
thick, smooth, transversely striate, the inner wall somewhat thinner, about 3 y, finely verru- 
cose; aeciospores angular-globoid, oblong, or irregular, 13-16 by 15-21 4; wall pale-yellow or 
colorless, thin, 1-1.5 4, very finely verrucose. 
III. Telia hypophyllous or petiolicolous for the most part, rather sparsely scattered or 
confluent in elongate patches 0.5-3 mm. in length, elliptic, 0.2-0.5 mm. long, tardily naked, 
pulverulent, light chestnut-brown, ruptured epidermis conspicuous; teliospores globoid, 
broadly ellipsoid, or obovoid, 15-23 by 21-27 4, rounded above, narrowed slightly or rounded 
below; wall cinnamon-brown, 1.5-2 » thick, with a low subhyaline papilla over the pore, 2-4 y, 
very minutely and inconspicuously verrucose, appearing smooth; pedicel short, deciduous, 
hyaline. 
