MILDEWS, RUSTS AND SMUTS 
145 
brown ; spores oblong or somewhat club-shaped, tip 
rounded, truncate or narrowed, thickened, scarcely con¬ 
stricted at the septum, base narrowed into the pedicel, 
smooth, brown, 30—60 x 12—24 p,, pedicel, tinged yellow, 
persistent ; mesospores more or less frequently present, 
and intermixed, 24—40 p long, smooth. 
Syn. Uredo scirpi, West. 
Piiccinia typhae, Kalchbr. 
Aecidhtm nymphoides, D.C. 
The aecidia occur on Limnanthemum nymphoides. 
The uredospores and teleutospores on Scirpus laciistris 
and S. tahernaemontana. Britain and Europe generally. 
GRAMINACEAE 
Puccinia graminis, Pers. ; Plowr., Ured., p. 162. 
Pycnidia. Arranged in small clusters, honey-colour. 
Aecidia. On the under surface of the leaves, also often 
on the fruit, on thickened, purplish spots, with a j^ellow 
border, cylindrical and somewhat erect, whitish, edge 
torn ; spores angularly globose, almost or quite smooth, 
orange, 18—30 p diam. 
Uredospores. Sori on both surfaces of the leaf, also on 
the leafsheaths and culm, scattered or arranged in rows, 
elongated, narrow, 2—3 mm. long, often growing into each 
other end on, and forming long streaks, suriounded by the 
split epidermis, powdery, yellowish-brown ; spores gener¬ 
ally elliptical, or ovate-oblong, echinulate, yellowish-brown, 
25—^45 X 18—25 p, with usually four germ-pores, arranged 
equatorially. 
Teleutospores. Sori on both surfaces of the leaf, also 
commonly on the leafsheaths and culm, scattered or ar¬ 
ranged in rows, often running into each other end on, and 
forming long streaks, soon naked, powdery, blackish ; 
spores oblong club-shaped or club-shaped, tip rounded or 
narrowed, much thickened, very slightly constricted a^ the 
septum, base narrowed, smooth, chestnut-brown, 40^—60 
X 15—25 p, pedicel tinged brown, persistent, thick, up to 
60 p long ; paraphyses absent. 
S3m. Aecidium berheridis, Pers. 
Uredo frumenti, Sow. 
Uredo linearis, Pers. 
Trichohasis linearis, Lev. 
Puccinia poculiformis, West. 
Puccinia graminis, Pers. 
