L78 puccinia 



epidermis, and consisting of a floor of crowded erect narrow brownish 

 hyphsB, each of which ahstricts from its apex a small, smooth, round, 

 thick-walled, nearly colourless spore, 8 M>/x diam. Plowright describes 

 and figures these spores as forming basipetal chains, Imt this I could not 

 see. The sori arc numerous, about 1 mm. diam. and dark-brown with a 

 greyish bloom, due apparently bo the overlying spores. Can they lie a 

 parasitic fungus like Darluca Filum, which has itself occasionally been 

 considered as an additional spore-form of the Uredine on which it prej ed ' 



The plants affected by the mycelium of the spermogones are permeated 

 by it ; they grow taller and more erect, the internodes are longer, the 

 Leaves paler, shorter, and thicker. Plowright considered this mycelium to 

 be perennial, which is very probable. The spermogones have a distinct. 

 but faint odour. 



The sculpture of the teleutospores is very striking and almost unique. 

 According to Sydow, it consists of a network of warts, but, in the British 

 specimens which I have seen, it would l>e more correctly described as a 

 series of pits arranged more or less in longitudinal lines (about 12 across 

 the spore). Fischer represents the network as much finer. As is frequently 

 the case, these markings can only be seen properly on the dry spore ; they 

 vanish almost completely when it is placed in water, unless it is emptied 

 of its contents. The germ-pore of the lower cell is placed near the insertion 

 of the pedicel, a very unusual position ; it is covered with a pale papilla 

 like the upper one. 



Distribution : Central and South-western Europe. 



50. Puccinia Gentianae Link. 



JEcidium Gentianae Jacz. Champ. Mont. p. 163 (1892), but \ 



Credo Gentianae Strauss in Wetter, Annal. ii. 102 (1811). 



Puccinia Gentianae Link, Spec. ii. 73. W. G. Smith, Card. Chron. 



xxiv. (1885) p. 372, f. 82. Cooke, (irevillea, xiv. 39. Plowr. Ured. 



p. 147. Sacc. Syll. vii. 604. Sydow, Monogr. i. 340. Fischer, 



Ured. Schweiz, p. 164, f. 126, 



[Spermogones. Honey-coloured, in small clusters. 



sEcidiospores. iEcidia hypophyllous or on the stems, on 

 circular brown spots, in irregular clusters, cup-shaped, with torn 

 white margin; spores delicately verruculose, orange, 16 — 23 x 

 14— 17 /x.] 



Uredospores. Sori ainphigenous, but oftener on the upper 

 surface, scattered or circinate, minute, roundish, at first covered 

 by the epidermis, pale-chestnut; spores globose to ovoid, 



