Thecaphora seminis-convolvuli (Desm.) S. Ito

Synonyms

Sorosporium hyalinum (Fingerh.) G. Winter
Thecaphora capsularum (Fr.) Magnus
Thecaphora convolvuli
Rostrup
Thecaphora convolvuli Schilb.
Thecaphora hyalina Fingerh.
Tuburcinia convolvuli (Desm.) Rostr.
Uredo seminis-convolvuli Desm.
Ustilago capsularum
Fr.

Description

Sori partly or completely destroying one or more seeds in scattered capsules, filling the capsules with a reddish brown granular-powdery spore mass.

Spore balls persistent, globose, ovoid to irregular, 20–55 µm long, composed of 2–10 (–18?) spores.

Spores hemispherical, wedge-shaped, subpolyhedral to irregular, (13–) 15–24 (–35) × 11–16 µm, light reddish brown, scarcely compacted; wall on the free surface coarsely and densely verrucose to echinate, with warts to 2.5 µm high; contact sides smooth.

Spore germination: a septate basidium develops thin branches, some of which fuse in pairs to produce hyphae; 1–several ovoid or long-ellipsoidal conidia produced on the tips of short or longer hyphal branches.

Anamorph: Thecaphorella antherarum (Oudem.) H. & I. Scholz; = Gloeosporium antherarum Oudem. is present in the anthers.

Hosts
   
Host family: Convolvulaceae
   
Host species: Convolvulus arvensis L.

Distribution

States & Territories: TAS