440
NORTH  AMERICAN  FLORA
[Volumk 7
I. Aecin amphigenous, crowded in small groups, 2-3 mrn in diameter, cupuiate, 0.2-0.3
mm, in diametei: peridium white or slightly yellowish, fragile; peridial cells oblong or comma-
form in radial longitudinal section, 13-22 by 26-44*1, considerably overlapping through a
long slender downward projection, the outer wall thin, 15-2 »% smooth, the inner wall thick,
4-9 n, closely and finely verrueose; aeciospores broadly ellipsoid or oblong, 16-1^ by 21-26 ^;
wall slightly tinted, thin, 1 m. very finely and closely verrueose.
II. Uredinia hypophyilous, scattered or in small groups, round or oval, 0.2-1 mm. across,
more or less covered by the ruptured epidermis, pulverulent, cinnamon-brown, ruptured epidermis conspicuous; urediniospores broadly ellipsoid, 19 25 by 23-29 M; wall light cinnamon-
brown, moderately thick, 1.5-2 m, moderately and finely echmulate, the porvs 3-4, equatorial
or approximately so.
III. Telia hypophyilous or caulicolous, scattered or circinating about the uredinia, round
or oval, 0.3-1 mm. across on the leaves, linear, 0,5-7 mm. long on the stems, sometimes remaining somewhat covered by the epidermis, pulverulent, dark chocolate-brown, ruptured
epidermis evident, teliospores broadly ellipsoid or oblong, 19-28 by 29-42 m, rounded above
and below, somewhat constricted at septum; wall chestnut-brown, 1.5-2.5 m thick, slightly
thickened over pores, 3-4 m, very closely and finely verrueose, often appearing smooth, the
pore of the upper cell variable, of the lower usually in the upper half of the cell, sometimes
below; pedicel colorless, fragile.
On Cichoriaceae:
Crepis barbigera Leib., Washington.
Crepis denticulata Rydb., Colorado.
Crepis glauca (Nutt.) T. & G., Utah.
Crepis intermedia A. Gray, Idaho, Oregon.
Crepis occidentalis Nutt., Montana.
Crepis runcinata (James) T. 8c G., Colorado.
Type locality: Kaiserjoch near Pettneu, Northern Tyrol, ori Crepis montana.
Distribution: Rocky mountains from Colorado northward into Canada; also in Europe.
Illustrations: Beitr. Krypt. Schweiz 2*:/. 165; Zeits. Pflanzenkr. 9: 278,/. 3at b, d.
Exsiccati: Barth. Fungi Columb. 4459; Clements, Crypt. Form. Colo. 135.
Doubtful species
Dicaeoma Campulosi (Thum.) Kuntze, Rev. Gen. 38: 468, 1898. {Puccinia Campulosi
Thum. Bull. Torrey Club 6: 215. 1878.) On Campulosus monostachyae Beauv. "America
septentr.; sine loco. Ex. herb. Dr. C. Keck/.' This species has not been reported by any
other person and the material from which the description was drawn has been destroyed by
fire. A search in the phanerogamic collections at the New York Botanical Garden, Academy
of Sciences at Philadelphia, National Herbarium at Washington, and Field Museum at Chicago,
on the host named, has failed to reveal any rust. The description given by von Thumen is
too meager to fully establish the species as wTholly distinct.
32.  PUCCINIOLA Marchand, Bijdr. Nat. Wet. 4: 47.    1829.
Uromyces$ Uromycopsis Schroet. Abh. Schles. Ges. 48: 11.    1869.
Uromycopsis Arth. Result. Sci. Congr. Bot. Vienne 345.    1906.
Cycle of development includes pyenia, aecia, and telia; autoecious. Pycnia and other
sori subepidermal.
Pycnia immersed in the host tissues, usually globoid or flask-shaped, with protruding osti-
olar filaments.
Aecia erumpent, cupuiate or cylindric. Peridium usually firm, dehiscent at apex and the
margins more or less reflexed. Aeciospores catenulate, globoid or ellipsoid; walls nearly or
quite colorless, verrueose.
Telia frequently first arise closely about the aecia, or even within the aecial cups, replacing
the aeciospores, afterward independently. Teliospores one-celled; wall colored, or in some
species colorless, smooth or sculptured, with one apical pore.
Type species, Uredo Behenis DC. t^on Sikne infiata).
Aecia and telia inhabiting monocotyledonous hosts.
Host belonging to family AUiaceae.
Teliospores small, 20-28m long.
Teliospore-wall smooth; pedicel concolorous. 1. P. Brodiaeae.
Teliospore-wall rugose; pedicel hyaline. 2. P. primavcrilis.
Teliospores larger, 26-39m long, with hyaline pedicel. 3. P. aurea.
Purdue
UNIVERSITY