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Page number:544 
Remarks (internal):The original epithet for this fungus, Uredo rhododendronis, was grammatically incorrect. However, the corrected form, Uredo rhododendri (Commonwealth Mycological Institute 1981), is a later homonyn of the anamorph name used by De Candolle (1815) for the uredinia of Chrysomyxa rhododendri de Bary. The name Caeoma rhododendri was also applied to the uredinial anamorph of Chrysomyxa rhododendri (Link 1825); therefore the new name Caeoma dumeticola is proposed for this rust.
Caeoma rhododendri-capitati and C. dumeticola are very similar, but there are slight differences in spore surface morphology, with C. dumeticola having more distinct, separate warts than C. rhododendri-capitati. Neither species has the longitudinal groove or smooth "cap" that is characteristic of almost all rhododendron rusts native to North America and Europe. Both species also lack the well-developed uredinial peridium found in Chrysomyxa dietelii, C. succinea, and D. forrestii.
 
Description type:Non-original description 
Description:Caeoma dumeticola P.E. Crane, nom. nov. Figs. 30-32
Uredo rhododendri Y.Z. Wang & Guo (as 'rhododendronis'), Acta Microbiol Sin 20:23 (1980), non U. rhododendri DC., Flore Fr. 6:86 (1815).
Etymology.. Named after dumetum, a thicket, for the montane scrubby habitat where the host plant, R. micranthum, occurs (Halliday 2001).
Uredinia hypophyllous, erumpent, scattered or in groups, variable in size and shape, 0.3-0.7 mm diam, no peridium. Urediniospores catenulate (no intercalary cells seen), narrow and elongated, ovoid, fusiform or ellipsoidal, one end pointed, the other truncate, 26-40 x 15-21 µm (av = 32.0 ± 3.5 x 18.0 ± 1.6 µm), coarsely verrucose; warts broad, annulate, separate and cylindrical or joined to form smoother areas; spore wall hyaline, variable in thickness, wall + warts mostly 1.6-3.3 µm thick, sometimes up to 5.7 µm thick at one end of spore.
Specimens examined. Tibet. On R. micranthum, Zogang, 31 Aug 1976, Y.C. Zong & Y.Z. Liao (holotype HMAS 37834).
 
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