146 W. B. Grove. 



uredospores in it (as described by H e n n i n g s , 1. c.) ; he remarks 

 that as the teleutospores easily separate into their component cells, 



and the description of the alleged uredospores agrees with the upper 

 cell of the teleutospores, he suspects that they are identical. 



M c Alpine (Rusts of Australia, p. 139, f. 40), on examining 

 a specimen sent by Hennings, could likewise find no uredo- 

 spores, but mesospores he remarks were very common. In Dr. S t o - 

 ward's specimens, the uredospores are abundant and at first in 

 separate sori; later teleutospores appear in the same sori, mixed with 

 the uredospores, but afterwards in sori of their own. The germ-pore 

 of the upper cell of the teleutospores is sometimes large and broad; 

 this makes them appear truncate at the apex, in that case. The 

 mesospores resemble the lower cell of the teleutospore, but are di- 

 stinguished by the pore contained in the apical thickening; the great 

 majority of them were immature and very pale in colour. 



Pteroconium. 



Genus Coniosporio affine, sed conidia ambitu tenuiore lobato 



accmcta. 



Pteroconium 



A c e r V u 1 i s conidiorum aterrimis, nitidis, piceis, oblongis, 

 magnitudine ludentibus, sube pi dermic is, dein epidermide nigri- 

 ficata evanida erumpentibus, planis, compactis, secus fibras in 

 series digestis, ca. 0,5 — 2 mm longis, at saepe confluentibus. C o - 

 nidiis polygonis, asteroideis. compressis, lentiformibus, 17 — 20 ju 

 lat., 4 — 7 tx cr., olivaceis, ambitu dilutiore (3 — 4 /i lat.) cinctis, stro- 

 mati e cellulis exiguis oHvaceis contexto insidentibus, pedicello 

 brevissimo subhyalino suffultis. 



Hab. in Sckoeno quodam, prope Perth Australiae occidentahs, 

 Jul. 1913 (no. 38). Conidia matura, asteris sic dicti formam ah- 

 quatenus imitantia, in ordines confertos singula arrecta digeruntur. 



This species is an ally of Coniosporium pterospermum C. & M. (in 

 Grevillea, XIX, 90), for which Saccardo suggests (SyU. X, 570) the 

 new genus Pteroconium. Pteroc. pterospermum is froni Victoria, 

 Australia. 



3. Hendersonia oligoseptata sp. n. 



Maculis nullis; pycnidiis hypophyllis, in greges rotundatos hinc 

 inde sparsos laxe collectis, globoso-conicis, atris, nitidis, 180—200 /x 

 diam., tectis, ostiolo papillato pertuso epidermidem perforantibus. 

 SporuHs numerosis, oblongis, utrinque rotundatis, 1-septatis, dein 



