Part 5, 1920] AECIDIACEAE 401 
conspicuous; teliospores ellipsoid, 21-27 by 31~42 #, rounded above and below, slightly con- 
stricted at septum; wall cinnamon- or chestnut-brown, 2-3 » thick, slightly thickened at apex, 
3~7 u; pedicel hyaline, thin-walled, 1 u or less, fragile, up to 40 w long. 
On Doe. a 
Dasystephana affinis (Griseb.) Rydb. (Gentiana afinis Griseb. » Col 
Nevada, North Dakota, Utah, oe i pea onan 
Dasystephana Andrewsii (Griseb.) Small (Gentiana Andrewsti Griseb.), Michigan, Minne- 
sota, Nebraska, New York, Wisconsin; Ontario. 
DESY kone Bigelovii (A. Gray) Rydb. (Gentiana Bigelovii A. Gray), Colorado, New 
exico. 
Dasysiephana linearis (Frél.) Britton (Gentiana linearis Frél.), New York. 
Dasystephana Menziesii (Griseb.) Arth. (Gentiana Menziesii Griseb.}, California. 
Dasystephana oregana (Engelm.) Rydb. (Gentiana oregana Engelm.), California, Idaho, 
Oregon, Washington. 
Dasystephana Parryi (Engelm.) Rydb. (Gentiana Parryi Engelm.), Colorado, Idaho. 
Dasystephana puberula (Michx.) Small (Gentiana puberula Michx.), Iowa, South Dakota. 
Dasystephana Romanzovii (Ledeb.) Rydb. (Gentiana Srigida A. Gray, G. Romanzovii Ledeb.), 
Alaska, Colorado. 
Dasystephana spathacea (H.B.K.) Arth. (Gentiana spathacea H.B.K.), Hidalgo. 
TYPE Locality: Europe, on Gentiana ciliata. 
_ Disrripution: From the Adirondack Mountains in New Vork westward to the Rocky Moun- 
tains, and from Montana and southeastern Alaska southward to Central Mexico; also in Europe. 
ILLUSTRATIONS: Beitr. Krypt. Schweiz 22: f. 126, 127, 128; Krypt.-fl. Brand. Pilze 3: f. B40; 
Corda, Ic, Fung. 4: pl. 4, f. 55. 
Exsiccatl: Barth. Fungi Columb. 2451, 2560, 2763, 3656, 4849; Barth. N. Am. Ured. 36, 142 
342, 2246; Brenckle, Fungi Dak. 415; Carleton, Ured. Am. 27; Clements, Crypt. Form. Colo. 136, 
562; Ellis, N. Am. Fungi 037; Ellis & Ev. Fungi Columb. 184; Ellis & Ev, N. Am. Fungi 2220; 
Garrett, Fungi Utah. 231; D. Griff. W. Am. Fungi 380; Sydow, Ured. 1978. 
195. Dicaeoma Convolvuli (Pers.) Kuntze, Rev. 
Gen. 33: 468. 1898. 
Uredo Betae Convolvuli Pers. Syn. Fung. 221. 1801. 
Uredo Convolvuli Strauss, Ann. Wett. Ges. 2:96. 1810. 
Uredo sepium Spreng. Syst. 4: 577. 1827. 
Puccinia Convolvuli Cast. Obs. 1:16. 1842. 
Uredo Calystegiae Desmaz. Ann. Sci. Nat. III. 8:10. 1847. 
Aecidium Calystegiae Cast.; Desmaz. Ann. Sci. Nat. II. 8:14. 1847. 
Aecidi: Convolvula um Cesati; Klotzsch, Herb. Viv. Myc. 1492; hyponym. 1850. 
Uromyces Calystegiae DeBary; Fuckel, Symb. Myc. 63. 1869. 
Aecidium dubium G. W. Clinton; Peck, Rep. N. Y. State Mus. 27: 104. 1875. 
Aecidiolum Convolouli Sace. Michelia 1:12. 1877. 
O. Pycnia epiphyllous, minute, gregarious, immersed, globoid or ovoid-globoid, 80-100 u 
broad by 90-150 » deep; ostiolar filaments free, 60-100 u long. 
I. Aecia hypophyllous, caulicolous, numerous, gregarious, crowded in groups 2-3.5 mm. 
across, hemispheric becoming cupulate when open, 0.2-0.4 mm. across; peridium whitish 
turning yellow, the margin fairly smooth and slightly recurved; peridial cells rhomboidal, 
16-21 by 23-31 uy, slightly overlapping, the outer wall 3.5 « thick, smooth, the inner wall 3-5 yu 
thick, verrucose; aeciospores angularly ellipsoid or globoid, 15-20 by 18-25 »; wall very light- 
yellow or colorless, 1-1.5 y thick, finely and rather closely and inconspicuously verrucose. 
II. Uredinia amphigenous, numerous, scattered, frequently grouped, irregular or roundish, 
0.1~0.8 mm. across, early naked, pulverulent, brown, ruptured epidermis conspicuous; uredinio- 
spores broadly ellipsoid or obovoid, 18-26 by 23~33 u; wall cinnamon-brown, 2-2.5 » thick, 
moderately echinulate, the pores 3, equatorial or slightly above the equator. 
III. Telia chiefly amphigenous, occasionally caulicolous, numerous, scattered or con- 
fluent, on stems in groups up to 2 cm. across, on leaves in groups considerably smaller, small 
punctiform or large irregular, 0.1-1.8 mm. across, rather tardily naked, compact, pulvinate, 
blackish-brown, ruptured epidermis noticeable; teliospores oblong, oblong-clavate or ellip- 
soid, 23-31 by 42-55 uw, obtuse or rounded or more or less attenuate above, rounded or slightly 
attenuate below, moderately constricted at septum; wall chestnut-brown, 2-3 » thick, thickened 
up to 5-13 » at apex, smooth; pedicel cinnamon-brown, persistent, thick, 7-10 w, about 35 u 
long. 
On CONVOLVULACEAE: 
Convolvulus arvensis L.., Massachusetts. . 
Convolvulus atriplicifolius (Hallier f.) House (C. nyctegineus Greene), Oregon. 
Convolvulus californicus Choisy (C. subacaulis Greene), California. 
