MILDEWS, RUSTS AND SMUTS 
i8i 
scattered or clustered, yellow, then pale ; spores in chains, 
irregular in shape, yellow, warted, 20—30 p, sometimes up 
to 80 p long. 
Teleutospores. Sori on the under surface of the leaves, 
often crowded, orange then red, often mixed with uredo- 
spore sori; spores oblong or oblong club-shaped, held 
together by mucus, 4-celled, 80—no x 20—30 p. 
Syn. Uredo euphrasiae, Schum. 
Uredo rhinantheacearum, D.C. 
Coleosporium rhinantheacearum, Lev. 
Uredo melampyri, Rebent. 
On Melampyrum arvense, Bartsia odontites, Euphrasia 
officinalis, Rhinanthus crista-galli, Pedicularis palustris. 
Europe generalh^ 
TRIPHRAGMIUM, Link. 
Pycnidia. Forming small, flattened, yellowish spots. 
Uredospores. Of two forms. One appearing in the 
spring, sori large, orange colour ; the other in summer 
and autumn, sori small. 
Teleuto spores. Consisting of three cells, each of which 
is triangular in form, and joined firmly together, the three 
septa radiating from a central point, each cell has one 
germ-pore. 
Distinguished from all other genera by the three cells 
forming the spore being grouped round a central point, so 
that the three septa radiate. The two side walls of each 
triangular cell, where it is in contact with an adjoining cell, 
are smooth, the free convex side of each cell is in some 
species covered with warts. 
Triphragmium ulmariae, Link, Plowr., Ured., p. 218. 
Pycnidia. Appearing in the spring. 
Uredospores. Spring form, forming large, powdery, 
orange patches, mostly on the veins and leafstalks, causing 
distortion of the parts attacked ; spores orange, minutely 
warted, oval or ovate, with a short pedicel, 20—30 x 18— 
24 p. Summer and autumn form has small sori on the 
under surface of the leaves, orange; spores globose or 
elliptical, minutely echinulate, orange, 20—35 x 20-—30 p. 
Teleuto spores. Sori small, circular, black-, persistent, 
becoming powdery, on the leaves and leafstalks ; spores 
normally 3-celled, subglobose, warted, chestnut-brown, 
40—55 [JL diam., pedicel colourless, persistent. 
