252 ERYTHEA. 
On Salvia mellifera. Pasadena, Cal., leg. McClatchie 
(No. 297). The same fungus has been sent by Dr. Harkness 
to the late Dr. G. Winter apparently on the same host plant. 
It has been confounded hitherto with Puccinia nigrescens, 
Pk., a species with smaller teleutospores, which are verrucose 
and not smooth, as principally described. 
ON CERTAIN LEAF-HAIR STRUCTURES. 
By Water C. BuasDALE. 
The structures which I shall consider in this paper occur 
in great abundance on the fronds or leaves of certain ferns 
of the genera Gymnogramme, Notholena, and Cheilanthes 
and on at least five species of the genus Primula. Though 
normally occurring on the lower surface only, they may 
appear on the upper, and in all cases are distributed 
quite uniformly; that is, without reference to the sori 
veinlets or other organs. 
They may be designated as simple capitate hairs, and the 
secretions to which they give rise, and which distinguish 
them from all similar structures, consist of certain mealy 
products that vary both in color and consistency. Some are 
crystalline, some are waxy or even oily, while others are 
merely granular. In color these secretions present various 
shades of yellow, red or orange but may be pure white. 
According to Hooker’s Synopsis Filicum, there are in the . 
genus Gymnogramme seven species that bear these glands; 
and, chiefly on this account, they have been set apart as the 
Ceropteris division, though certain botanists have con- 
sidered the group a distinct genus in itself. The species are 
as follows: 
G. triangularis, Kaulf. A widely distributed species ap- 
pearing on the Western Coast of America and reported to 
range from Vancouver Island to Peru. 
G. trifoliata, Desv. A native of Cuba, Brazil and Peru. 
The fertile fronds bear an abundance of white or yellow 
powder. 
