ENDOPHYLLUM-LIKE RUSTS OF PORTO RICO 
47 
only 2 spores to each promycelium, instead of the normal 4 basidio- 
spores. We are as yet uncertain as to the constancy of this character; 
neither are we yet oriented as to its probable significance. 
The general characters and systematic arrangement of the short- 
cycled rusts which we have found to produce promycelia are described 
below, under 6 species. These are all considered in our title to be 
Endophyllum-like, although it will be noted that only 4 of the 6 species 
are really placed in this genus. The first one described is, in fact, not 
at all aecidioid, but uredinoid in its fructifications; while the last one 
of the list, while aecidioid, differs sufficiently from Endophyllum to 
justify its being placed in a separate genus. 
Botryorhiza Whetzel & Olive, gen. nov. 
Cycle of development includes only telia. 
Pycnia unknown (probably not formed). 
Telia subepidermal, erumpent; teliospores thin-walled, oval, one- 
celled, borne singly on long pedicels; each germinating apically on 
maturity to produce a promycelium with 4 basidiospores; haustoria 
botryose, or irregularly branched. 
Type species, Botryorhiza Hippocrateae Whetzel & Olive, on 
Hippocratea voluhilis. The generic name is derived from the fact 
that this form produces large, botryose haustoria, a character ap- 
parently occurring also in certain smuts. ^ 
Botryorhiza Hippocrateae Whetzel & Olive, sp. nov. 
O. Pycnia wanting (probably not formed). 
III. Telia mostly hypophyllous but sometimes amphigenous or 
caulicolous, generally from a localized mycelium, sometimes from a 
systemic invasion affecting entire young shoots ; localized sori densely 
crowded in more or less orbicular or irregularly shaped, somewhat 
hypertrophied pulvinate areas, i mm.-i cm. or more across, the 
affected areas yellowish when young, when older becoming whitish 
due to the germination of the spores; in older leaves often killing 
affected spots, which turn brown, the resultant rounded, swollen 
dead areas then bearing a striking resemblance to certain insect galls. 
Telia pulverulent, erumpent, from a definite, superficial, uredinoid 
^ Lutman (Some contributions to the life history and cytology of the smuts. 
Trans. Wis. Acad. Sci. 16: 1191-1244. 1910) has figured botryose haustoria in 
Doassansia deformans. (See his figs. 44, 45.) 
