Thecaphora Fingerh.

Type

Thecaphora hyalina Fingerh. on Convolvulus sepium L.

Synonyms

Angiosorus Thirum. & O'Brien
Poikilosporium Dietel
Sorosporium F. Rudolphi

Description

Sori in various parts of the host plants, filled with masses of spore balls, rarely solitary spores, yellowish to dark reddish brown, not black, and without violet tints. Peridium and columella absent.

Spore balls composed of few to many loosely or firmly agglutinated spores.

Sterile cells or hyphae not present in the spore balls; no spores or differentiated sterile cells present between the spore balls (or single spores). Spore ball formation through differentiation within an agglomerated sporogenous mass of hyphae that are completely consumed for spore building.

Spores subpolyhedrally irregular, often wedge-shaped, more rarely globose or broadly ellipsoidal; wall thin, smooth or nearly so on the contact sides, thick and ornamented on the free side; in some cases the entire surface is ornamented and, exceptionally, the spores are smooth.

Spore germination not uniform, variable, from typical holobasidia to typical phragmobasidia, sometimes resulting in germ tubes, often with a basal swelling (basidium?), initially aseptate, later septate, with or without ramifications and conjugations, growing out as filaments producing apically or subapically ovoid or cylindrical aerial “sporidia”, often on terminal ramifications.

Host-parasite interaction by intracellular hyphae coated by an electron-opaque material.

Septa poreless at maturity.

Comments

Thecaphora contains about 58 species parasitising hosts in 16 families of dicotyledons and in the monocotyledonous family Liliaceae s. lat. Four species have been found in Australia, two of which are endemic.

Species in Australia
 
Thecaphora lagenophorae
Thecaphora leptideum
Thecaphora maireanae
Thecaphora seminis-convolvuli

Key based on host taxonomy
 
On ChenopodiumThecaphora leptideum
On ConvolvulusThecaphora seminis-convolvuli
On LagenophoraThecaphora lagenophorae
On MaireanaThecaphora maireanae