ON RUBIACEE 165 
4icidiospores. AKcidia hypophyllous, scattered or collected 
in orbicular clusters on roundish or oblong paler spots, shortly 
cylindrical, with a short white recurved margin; spores 
globose or broadly ellipsoid, orange-yellow, somewhat smooth, 
16—23 p. 
Uredospores. Sori hypophyllous, minute, roundish, on the 
stems linear, reddish-brown, often confluent; spores globose to 
ovate, aculeolate, pale-brown, 22—30 x 17—23 u, with two or 
three germ-pores. 
Fig. 115. P. punctata. Teleutospores; a, on G. saxatile; b, on G. palustre ; 
ce, on G. verum. 
Teleutospores. Sori similar, but black, compact, and per- 
sistent; spores ellipsoid to clavate, truncate, rounded or coni- 
cally attenuate above, where they are much thickened (up to 
14), and often darker, slightly constricted, tapering below, 
brown, smooth, 30—56 x 14-244; pedicels brownish above, 
persistent, thick, about as long as the spore; a few mesospores 
occasionally. 
On leaves and stems of Galiuwm Cruciata (?), G. Mollugo, 
G. palustre, G. saxatile, G. uliginosum, G. verum. Not uncom- 
mon. Atcidia, June; teleutospores, August and September. 
(Fig. 115.) 
The forms of P. punctata on these various species of Galium differ 
considerably in the shape and size of the teleutospores, and have been 
divided into several biological races. On G. Aparine there is a distinct 
species, P. difformis (q.v.); but it is possible that P. punctata also occurs 
