REPORT OF THE BOTANIST. 113 
subelliptical, variable, 001—.0013' long, .0008—.0009° broad, the 
cells sometimes subdivided. 
Leaves of the dandelion, Taraxacum Dens-leonis. New Balti- 
more. September to November. fev. J. L. Zabriskie. 
The remarkable feature of this species is the variable form of the 
spores; yet in this character even, it approaches some forms of 
the next species very closely. It attacks especially the leaves of 
young or seedling plants. The peduncle is sometimes attached to 
the side of the spore. I have seen no American specimens with 
the spore cells subdivided. 
7. P. Compostrarum Schl. Composite Brand. 
Amphigenous;_ spots pallid or none; sori small, subrotund, sur- 
rounded by the ruptured epidermis, brown; spores .0013’—.0016’ 
long, .0008—.001’ broad. 
Leaves and stems of Canada thistle, Cirsium arvense. Common. 
August to October. 
Variety Wabali has the spores broadly elliptical or subglobose 
and generally a little smaller. It occurs on leaves of Wabalus 
albus. Trichobasis Cichoracearum Lev. is the Uredo form. 
§ 2. Spores aculeate. 
8. P. acuteata Schw. Mandrake Brand. 
Hypogenous; spots large, angular, often confluent, yellow or 
brown ; sori small, loosely clustered, surrounded by the ruptured 
epidermis, brown or blackish-brown; spores elliptical or oblong, 
obtuse, scarcely constricted, sometimes slightly tapering toward the 
base, rough with prominent spine-like teeth, .0016°—.0022' long, 
.0008’—.001' broad ; peduncle very short or indistinct, often want- 
ing. 
Leaves of mandrake, Podophyllum peltatum. Common. June 
and July. ’ 
This is the P. Podophylli of Schweinitz Fungi of North Caro- 
ae It sometimes occurs associated with Meidium Podophylli 
chw. 
§ 3. Spores irregular, subelliptical or ovate, generally with a small 
pustule or apiculus at the apex; peduncle short, easily separating. 
9. P. rrrpustuntata Pk. Blackberry Brand. 
Hypogenous; spots small, distinct, angular, yellow; sori very 
minute, few, loosely clustered, brown ; spores triangular, sometimes 
ovate, not at all or but slightly constricted, mostly tripustulate, 
.0013—.0016' long, .0008—.0009' broad. 
15 
