CRONARTIUM 313 
As the remarkable suggested ecidium-stage may possibly 
be found in this country, it will be convenient to add -here 
the description given of it, so as to aid in its identification : 
PERIDERMIUM CONORUM-PICE% 
(Hcidium conorum-Piceae Reess.) 
AKcidia on the outer surface of the scales, large, 4 cm. or more 
in diam., oblong or irregular in shape, 
one or two (or in any case few) on 
each scale, immersed, white; spores 
ellipsoidal, orange; 28—35 x 18— 
24 4; epispore with numerous, large, 
crowded, prismatic warts, each about 
3—4 yw wide. 
Fig. 237. P. conorum-Piceae. 
icidiospore, from scales of 
On cones of Picea excelsa. Au- a a as 
gust, September. In some years 
rather common in the Alps and Jura Mountains. (Fig. 237.) 
CRONARTIUM Fries. 
Spermogones hemispherical. Atcidia with a broad, inflated, 
irregularly torn peridium; ecidiospores with a coarsely verru- 
cose membrane, smooth on one side, without germ-pores, 
separated by well-marked intercalary cells. Uredo-sori enclosed 
in a hemispherical peridium which opens at the summit by a 
narrow pore; uredospores produced singly, on pedicels, echinu- 
late, without germ-pores. Teleutospores abstricted in long 
chains, and remaining united into cylindrical columns which 
are horny when dry, germinating as soon as mature. Basidio- 
spores round, very minute. 
1. Cronartium asclepiadeum Fr. 
Cronartium asclepiadeum Fr. Obs. Mye. i. 220 (1815). Fischer, Ured. 
Schweiz, p. 481, f. 295. Sacc. Syll. vii. 597. 
C. Paeoniae, Cast. Catal. Pl. Marseill. p. 217 (1845). Cooke, Mier. 
Fung. p. 215. 
