CALIFORNIA ACADEMY OF SCIENCES. 31 



Exobasidium decolorans. 



Receptaculum effused, producing conspicuous yellowish- 

 white, orbicular spots, 1 — 2 cm. in diameter, not at all dis- 

 torting the leaf; spores appearing upon the under surface, 

 hyaline, straight, /.i 7 — 8 x 4 — 5. 



On living leaves of Rhododendron occidentale. Tamalpais, 

 Autumn. 2887. 



Septoria Hosackiae. 



Perithecia minute, amphigenous, on yellowish-brown, 

 irregular spots; spores filiform, flexuous, hyaline, 3 — 7-sep- 

 tate. /< 64 x 4. 



On living leaves of Hosaclda strigosa. Antioch, April. 



3094. 

 Septoria lupini. 



Epiphyllous; sparsely scattered over indeterminate }-el- 

 lowish spots, or the whole leaflet, minutely papillate; spores 

 linear, acute at each end, obscurely septate. /* 40 — 60 X 

 4—5. 



On living leaves of Lupinus densiflorus. Tamalpais, 

 May. 3190. 



Septoria Wyethiae. 



Perthecia amphigenous, covering the greater part of the 

 leaf; spores linear, obscurely septate, or simple, j.i 56 X 6 — 8. 



On living leaves of Wyethia mollis. Sierra Nevada, Aug. 



3579. 

 Marsonia lonicerae. 



Epiphyllous, sparsely scattered on irregular white spots, 



bordered with brown; spores hyaline, clavate, often curved; 

 septum near the base. j.i 35 — 40 X 7 — 9. 



On living leaves of Lonicera conjugialis. Summit of the 

 Sierra Nevada, Aug. 3576. 



Marsonia neillise. 



Epiphyllous, on small angular, brown spots, spores 



