4 ARTHUR: NEW SPECIES OF UREDINEAE 
obovate-oblong, irregular, 24-32 by 40-55 4, rounded at both 
ends, slightly or not constricted at the septum ; wall uniformly 
medium thick, 2.5—3 », noticeably and closely tuberculate, choco- — 
late-brown ; pedicel short, colorless, incompletely deciduous. 
On Heracleum lanatum Michx., Pillar Point, San Mateo — 
County, California, October 1, 1902, C. F. Baker, no. 1735. 
Puccinia Diplachnis sp. nov. 
II. Uredospores in the teleutosori broadly ellipsoid or nearly 
globose, 19-21 by 24-26 »; wall colorless, thick, 3 4, closely and © 
finely verrucose, pores apparently 4, equatorial. 
III. Teleutosori chiefly hypophyllous, oblong or linear, soon — 
naked, pulvinate, prominent, compact, blackish-brown ; teleuto- 
spores ellipsoid, 20-24 by 32-39 4, slightly or not contracted at 
the septum, rounded or obtuse at both ends ; wall smooth, medium ~ 
thick, 1.5-2.5 , thicker at the apex, 3-7 yp, chestnut-brown; 
pedicel tinted next the spore, one to two and a half times length ~ 
of the spore. 
On Diplachne dubia Benth., Big Springs, Texas, October 13, | 
1902, S. M. Tracy, no. 8270. The description of the uredo — 
stage is incomplete, as no separate sori were seen. It is probable - 
that the rust on Diplachne serotina of Germany is the same species, 
judging from Sydow, Uredineen, no. 414, although both the uredo — 
and teleutospores are a little larger than in the American speci- _ 
men. The species differs materially from /Puccinia australis 
Kérn. on Molinia, which has its aecidum on Sedum. In P. aus- 
tralis the teleutosori and spores are lighter colored, and the uredo 
spores have thicker, deep golden yellow walls, with coarser sculp- 
Puccinia Helianthellae sp. nov. 
II. Uredosori amphigenous, scattered, round, soon naked, pul 
verulent, chestnut-brown; uredospores globose, large, 25-32 4 in 
diameter ; wall chestnut-brown, thick, 3, finely and sparingly — 
echinulate with blunt points, pores 2, equatorial and opposite. : 
III. Teleutosori ROP RESTO scattered, round, soon naked 
oblong, 20-26 by 30-40 p, rounded or obtuse at both ends, — 
slightly or not a ac at the septum; wall smooth, chestnut 
brown, medium thick, 2—2.5 4, sometimes slightly thicker at apex. 
2.5—4 2; pedicel colorless, delicate, often as long as the — 
imperfectly fugacious. 
