Rhytisma

761. Xyloma umbilicatum Pers. in Litt*
Ad folia arida Crataegi Oxyacanthae. Hynme.
Perithecio appianato in centrum depresso ( unibilicato ), perforato
gelatinam spo rife rain effondente ut in Sphacnis,
NEW YORK BOTANICAL GARDEN
Stirpes Cryptogamae Vogeso-rhenanae
1810-1826
J. B. MOUGEOT ET C. NESTLER
.GARDEN
02970917
02970917