74 CLASSIFICATION 
B. PEDICELLATZ. 
V.  Pucciniaceee — Teleutospores distinctly pedicellate 
though the pedicel is often very short or caducous, united 
into pulvinate sori, easily separable or immersed in gelatine, 
each spore consisting of one or more cells arranged in rows or 
groups. Germination by an external basidium ; basidiospores 
more or less ovate. A¥cidia with or without peridium. Uredo- 
spores always abstricted singly on distinct pedicels. 
The following genera belonging to these families are British, 
excluding Uredinopsis : 
MELAMPSORACEA. 
A. Teleutospores composed of 2—4 laterally adherent cells, the septa 
in the latter case cruciately arranged. 
a. Teleutospores colourless, scattered singly in the host-tissues or 
formed in the epidermal cells. On Ferns. 
[1. Teleutospores extracellular, scattered. Uredospores surrounded 
by a peridium, colourless, without germ-pores. Uredtnopsis.] 
2. Teleutospores intracellular. Uredospores surrounded by a 
peridium, colourless, without evident germ-pores. Jfilesina. 
3. Teleutospores intracellular. Uredospores without (or with a 
very rudimentary) peridium, yellow, with germ-pores. 
Hyalopsora. 
b. Teleutospores brownish, in the epidermal cells or forming 
subepidermal crusts. On Seed-plants. 
1. Teleutospores intracellular. cidiospores without smooth 
spot. Calyptospora. 
2. Teleutospores intracellular. AEcidiospores smovcth on one side, 
Thecopsora, 
3. Teleutospores extracellular, subepidermal. Kcidiospores 
smooth on one side. Pucciniastrum. 
B. Teleutospores one-celled, united into crusts. 
a. Teleutospores in the epidermal cells, usually one-celled, faintly 
coloured. Uredospores with peridium, but without para- 
physes, and without evident germ-pores. Acidium with a 
peridium. Melampsorella, 
b, Teleutospores not intracellular, one-celled, brown. 
1. Teleutospores subepidermal. Uredo- and secidiospores as 
above. Melampsoridium., 
2. Teleutospores subepidermal or subcuticular. - Uredospores 
without peridium, but with paraphyses. cidium of the 
cxoma type. Melampsora. 
