640 Transactions. 
3. Pucctnia Persoon. 
Pers., Tent. Disp. Meth., p. 38, 1794. 
Bullaria DC., Fl. Fr., vol. 2, p. 226, 1805. Dicaeoma 8. F. Gray, Nat. Arr. 
Brit. Pl, vol. 1, p. 541, 1821. Solenodonia Cast., Cat. Pl. Mars., р. 202, 
5. Eri j ro: nn. Sci. Nat. 
Sci. Insboa, vol. 6, p. 239 7 
p. 188, 1889. Jackya Bubak, Oesterr. Bot. Zeits., vol. 52, p. 42, 1902. 
Micropuccinia Rostr., Plantep. Haandb., p. 266, 1902.  Leptopuccinia Rostr., 
Lc., p. 268. Tranzschelia Arth., Result Sci. Congr. Bot. Vienne, p. 340, 
1906. Polythelis Arth., l.c., p. 341.  Allodus Arth., lc., p. 345. asyspora 
„ Lc, p. 346. Polioma Arth., Jour. Myc., vol 13, p. 29, 1907. 
Nephlyctis Arth., l.c., p. 31.  Prospodium Arth., Lc. Argomyces Arth., 
N. Am. Fl., vol. 7, p. 217, 1912. Sclerotelium Sydow, Ann. Myc., vol. 19, 
р. 172, 1921.  Coronotelium Syd., l.c. eristemma Syd., lc., p. 175. 
Schroeterella Syd., ibid., vol. 20, р. 119, 1922.  Trailia Syd., l.c., p. 121. 
Autoecious or heteroecious. Cycle of development includes 0, I, II, III. 
0. Spermogones flask-shaped, immersed, the surrounding paraphyses 
alone protruding, honey-coloured. 
I. Aecidia at first immersed, becoming erumpent and cupulate or 
cylindrieal. Peridia hyaline, less frequently coloured, margins erect or 
revolute, dentate, lacerate, or seldom entire. Aecidiospores catenulate, 
commonly polygonal, less commonly elliptical ; epispore usually verruculose, 
hyaline, seldom tinted, with numerous scattered and indistinct germ-pores. 
П. Uredosori without peridia, commonly pulverulent, with or without 
paraphyses, and usually surrounded by the ruptured epidermis. Uredo- 
spores globose to obovate, borne singly at the apices of pedicels; epispore 
commonly echinulate, less frequently verrucose, coloured, with one or several 
evident germ-pores, which may be scattered over the surface or equatorially 
arranged. 
III. Teleutosori compacted, less frequently pulverulent, naked or long 
covered by the epidermis. Teleutospores bicellular, borne singly on the 
apices of distinct pedicels ; epispore smooth or variously sculptured, coloured 
or less commonly hyaline, with one distinct germ-pore in each cell, germ- 
pore varying in position from apex to base of each cell. 
New Zealand species 57, of which 41 are indigenous, 21 being endemic. 
This species is closely related to the genus Uromyces, being separated 
solely on account of the two-celled teleutospores. 
Although in the introduction the full cycle was discussed, it does not 
follow that all species have a cycle including all spore-stages. For example, 
we have species with all stages present, or with one or more omitted, as 
under (0 — spermogones ; [= aecidia; II — uredospores ; III = teleuto- 
spores) :— : 
0, L II, Ш = Eu-form : e.g., Puccinia clavata Syd. 
0, I, III = Opsis-form: e.g., Puccinia distincta McAlp. 
0, IL, III = Brachy-form: e.g., Puccinia obtegens Tul. 
0, ПІ = Micro-form: e.g., Puccinia Plagianthi McAlp. 
As a tule, when spermogones accompany a stage it is an indication that 
that is the first stage to appear, and thus is some indication as to the length 
of the cycle; for example, if spermogones accompany the uredosori (primary) 
the aecidia are generally absent, and if spermogones accompany teleutosori, 
then both aecidia and uredospores are absent. Where the rust is heteroecious, 
with its aecidia on one host and uredo- and teleuto-sori on another, there 
is, as a rule, nothing to indicate the relationship between the two forms, 
