Part 6, 1921] AECIDIACEAE 463 
I. Aecia hypophyllous, caulicolous, gregarious, usually in large groups often covering the 
entire surface of leaflets and considerable portions of the stems and petioles on discolored spots 
1-15 mm. long, ctrpulate or short-cylindric, 0.3-0.6 mm. in diameter; peridium colorless, the 
margin slightly erose and recurved; peridial cells rhomboidal in longitudinal section, 21-26 
by 27-40 », the outer wall thick, 10-13 y, striate only near the lumen, the inner wall thinner, 
6-8 w, fimbriate-verrucose; aeciospores globoid or ellipsoid, 18-22 by 20-29 «; wall colorless, 
1.5-2 » thick, finely verrucose. 
Ill. Telia hypophyllous or caulicolous, scattered or in small groups, often confluent, round- 
ish or oblong, 0.2-1.5 mm. long, rather long covered by the epidermis, pulverulent, chocolate- 
brown; teliospores broadly ellipsoid or oblong, 21-26 by 29-40 yp, usually rounded at both ends; 
wall chestnut-brown, 2.5-3.5 uw thick, rarely thickened up to 5 4 above, coarsely and sparsely 
verrucose; pedicel colorless, ustially deciduous, rarely as long as spore. 
On AMMIACEAE: 
Lepiotaenia dissecta Nutt. (Ferula dissoluta S. Wats.), California, Oregon, Washington. 
Tyre Locatity: Klickitat County, Washington, on Ferula dissoluta. 
Distrrsution: Central California to southern Washington. 
Innustrations: Holway, N. Am. Ured. 1: ol. 43, f. 140a, b. 
ExsiccaTi: Barth. N. Am. Ured. 1219. 
19. Allodus Jonesii (Peck) Arth. Résult. Sci. 
Congr. Bot. Vienne 345. 1906. 
Puccinia Jonesii Peck, Bot. Gaz. 6: 226. 1881. 
Puccinia Cymopteri Dietel & Holway; Dietel, Bot. Gaz. 18: 255. 1893. 
Dicaeoma Cymopteri Kuntze, Rev. Gen. 33: 468. 1898. 
Dicaecoma Jonesii Kuntze, Rev. Gen. 33: 469. 1898. 
Accidium Lepiotaeniae Lindr. Medd. Stockh. Hégsk. Bot. Inst. 49: 8. 1901. 
Puccinia Traversiana Sydow, Monog. Ured. 1: 889. 1904. 
Allodus Cymopieri Barth. N. Am. Ured. 2002. 1918. 
O. Pycnia amphigenous, caulicolous, gregarious, in roundish or oblong groups 1-5 mm. 
long, surrounded by or intermixed with the aecia, occasionally more or less encircling the 
aecia, erumpent, globoid or conoidal, 70-120 » in diameter by 50-110 4 high; ostiolar filaments 
up to 65 » long. : 
I. Aecia chiefly hypophyllous and cattlicolous, gregarious, on roundish or oblong yellowish 
spots 1-3 mm. long, short-cylindric, 0.2-0.5 mm. in diameter; peridium colorless, the margin 
erose and recurved when mature; peridial cells rhomboidal in longitudinal section, 19-26 by 
27-37 p, the outer wall 7-12 u, striate only near the lumen, the inner wall 5-7 w thick, rather 
coarsely and deeply lacerate-verrucose; aeciospores globoid or broadly ellipsoid, 16-23 by 18- 
26 yw; wall colorless or light-yellow, 1-1.5 thick, finely verrucose. 
III. Telia amphigenous and caulicolous, scattered when foliicolous, often confluent along 
the stem, ustially 0.3-2.5 mm. across, tardily naked, cinereous, pulverulent, chocolate-brown 
or blackish; teliospores broadly ellipsoid or oblong, 18-24 by 29-43 pn, slightly constricted at 
septum, usually rounded at both ends; wall dark cinnamon- or chestnut-brown, 1.5-2.5 » 
thick, usually uniform, varying from very minutely punctate to conspicuously verrucose, the 
tubercles more or less arranged in longitudinal striations; pedicel colorless, deciduous, fragile, 
rarely as long as spore. 
On AMMIACEAE: 
Cogswellia angustata Coult. & Rose, Oregon. ; 
Cogswellia daucifolia (Nutt.) M. E. Jones (Peucedanum daucifolium Nutt.), Kansas. 
Cogswellia foeniculacea (N’ utt.) Coult. & Rose (Peucedanum foeniculaceum Nutt., Lomatium 
foeniculaceum Coult. & Rose), Kansas, Nebraska. ; : 
Cogswellia Grayi Coult. & Rose (Peucedanum Grayi Coult. & Rose, Lomatium Grayi Coult. 
& Rose), Utah. : 
Cogswellia lapidosa (M. E. Jones) Rydb. (Cymopterus lapidosus M. E. Jones), Utah. _ 
Cogswellia macrocarpa (Nutt.) M. E. Jones (Peucedanum macrocarpum Nutt., Lomatium 
macrocarpum Coult. & Rose), Montana, Nevada, Washington. 
Cogswellia montana M. EB. Jones (Lomatium purpureum A. Nelson), Montana. 
Cogswellia nevadensis (S. Wats.) M. E. Jones (Peucedanum nevadense S. Wats.), Nevada. 
Cogswellia orientalis (Coult. & Rose) M. E. Jones (Peucedanum nudicaule Nutt., Lomatium 
orientale Coult. & Rose), Arizona, Colorado, Nebraska, Oklahoma. . 
Cogswellia platycerpa (Torr.) M. E. Jones (Peucedanum simplex Nutt., Lomatium platy- 
carpum Coult. & Rose), California, Utah. . ; 
Cogswellia Suksdor fii (S. Wats.) M. E, Jones (Peucedanum Suksdorfi 8. Wats., Lomatium 
Suksdorfii Coult. & Rose), Washington. 
