EXOTIC FUNGI IN THE ROYAL HERBARIUM, KEW. 
5 
3 p thick. From the above accounts it will be seen that the fungus 
under consideration is not a Phragmidium , as considered by Thumen, 
neither does it agree with Kornicke’s genus Hamaspora ; never- 
theless, we are not disposed to establish a new genus for its recep- 
tion, but rest content with indicating some of its peculiarities. 
Uredo lucida was supposed by Thumen to be the uredo-stage of 
the above fungus only because it occurred on the same host-plant, 
Bubus rigidus. 
PI. 182, Fig. 11, Hamaspora longissima, group of filaments of 
agglutinated teleutospores, x 3 ; Fig. 12, teleutospores, one show- 
ing the commencement of germination, x 500 ; Fig. 13, teleuto- 
spore producing promjcelium-spores, x 500 ; Fig. 14, promy- 
celium-spore germinating, x 500 ; Fig. 15, spores of Uredo lucida , 
from Thumen’s specimen, x 500. 
DENMOGRAFHIUM. Mass. (n.g.). 
Stem compound, simple or branched, formed of parallel, septate, 
coloured hyphae that are agglutinated together below, the tips 
becoming free and lax at various levels (not capitate), and bear- 
ing the concatenate* coloured, septate conidia at their apices. 
The present genus is in reality a compound Helminthosporium , or 
a Podosporium with catenulate conidia. 
Distinguished from Helminthosporium as at present understood 
by the fasciculate arrangement of the erect hyphse, which coalesce 
at the base in considerable numbers to form a compound stem; 
the conidia are also more persistently catenulate, although in both 
Helminthosporium and Heterosporium the conidia are often pro- 
duced in chains that separate at an early stage of development. 
Dendrographium atrum, Mass. 
Gregarious, black, 1-1*5 m.m. high; hyphse 5-6 p thick, dark 
brown below, paler above, with numerous transverse septa ; 
conidia cylindrico-clavate, 5-7 septate, not constricted at the 
septa, brown, pellucid, produced in short chains, 40-50 x 5-6 p. 
On slender twigs. Amazon Valley. 
Densely gregarious, surrounding the twigs and resembling a 
coarse velvet pile. 
PI. 182, Fig. 6, entire fungus, x 400. 
G-uepinia elegans, Berk. Sf Curtis, Hook. Kew Misc., i., p. 239 ; Sacc. 
Syll., Vol. vi., No. 8517. 
Spores elliptic-oblong, ends obtuse, slightly curved, 3-septate, 
colourless, 12-13x5-6 p. 
Guepinia pezizseforxnis, Berk. Rook. Bond. Journ. 1845, p. 60 ; Sacc. 
Syll., Vol. VI., No. 8518. 
Spores elliptic-oblong, tips rounded, slightly curved, 3-septate, 
colourless, 10x5 p. 
Guepinia dilatata, Berk. Rook. Journ., 1856, p. 274, t. x., Fig. 4 ; Sacc. 
Syll., Vol. vi., No. 8525. 
Spores elliptic-oblong, ends rounded, continuous, colourless, 
7 x 3-6 p. 
