Pucciniastrum sparsum (Winter) Fischer, 1904

on Picea

Picea abies, France, Rhône-Alpes, Haute-Savoie, Les Contamines, 1200 m: aecia © Arnold Grosscurt

gall

Aeciospores orange, 21-32 x 18-25 µm, densely verrucose, except for one narrow smooth zone.

spermogonia, aecia

Pinaceae, monophagous

Picea abies.


on Arctostaphylos

Pucciniastrum sparsum: uredinium (section)

Arctostaphylos uva-ursi, from González-Fragoso (1925a): section through uredinium. The layer of thick-walled cells below the epidermis is the actual outer wall of the uredinium: the peridium

gall

uredinia minute hypophyllous warts, ultimately breaking through the epidermis; the corresponding upperside spotted yellow to red; spores elliptic, thin-walled, remotely echinulate. Teliospores mostly subepidermal.

uredinia, telia

Ericaceae, monophagous

Arctostaphylos alpinus, uva-ursi.

synonyms

Thekopsora sparsa (Winter) Magnus, 1905.

references

Blumer (1946a), Brandenburger (1985a: 20, 464), Gäumann (1959a), Klenke & Scholler (2015a), Termorshuizen & Swertz (2011a).

mod 30.vii.2018