/'(//■(fsific Fii)i(/i of Ilh'nois. 219 



U. hydrangeas, B. & C. 



Hypogeiious. S[iots small, ydlowisli, jiiorc or less conHii- 

 cnt. Sori minute, scattered, few; spores obovate, produced on 

 })edicels, minutely tuberculate, 12-18 l)y 16-24 ^. 



On HijclraHcjea arhorescens. 



This name is attached to specimens in the Curtis herbarium, 

 ai>d [)nblished in Curtis' Cat. Pits. N. C, p. 122, without des- 

 cription. The specimens from which the description is taken 

 were collected by Mr. F. S. Earle, Cobden, Oct. 18. ]S7*.). 

 There is no evidence of the occurrence of the fungus else- 

 where in the State. 



X C^OMA, TUL. 



Spores one-celled, produced in vertical chains, soon sepa- 

 rating in a powdery mass, sorns without ]»seudo)ierl(lin]n, but 

 sometimes covered by a thin adherent mem))rane. often with 

 spermagonia, and with or without i)ara])hvses. 



The term Cieoma has been used with several and very dif- 

 ferent significations. As here limited it does duty, pro))altly 

 tcmjjorarv. as a genus of so-called species of which teleuto- 

 sporic forms are still unknown. As defined the genus difl'ers 

 from Vt'cdo in the manner of the production of the spores, and 

 from .Ecidiiiiii in the absence of a peridium. According to 

 some authors the presence of spermagonia is taken as the special 

 characteristic of (Ut'onta as against Uredo, so that with these 

 writers the forms having spores in (diains, but without sperma- 

 gonia. are arranged under the lattei', as, for example, the so- 

 called J 'redo (((jriinoniif, — herein found as Cd'onia (((jriiiionid', 

 Schw. It, however, seems pretty evident that, with or without 

 spermagonia, those forms having spores in chains represent 

 rather the tecidial than the uredo stage, and as s(jme species of 

 . Ec id i 1(1)1 hiivt no spermagonia, the absence of the latter in 

 €(('0)11(1 ought not to l»e unlooked for. 



Some of the so-called C<i'0))i(i' have been identified as the 

 a^cidial forms of Fh)-a(j))i(diif)n^ which see. Comi)are also Cole- 



()Sj)0)-ill)ll. 



