60 REPORT OF THE BOTANIST. 
EXPLANATION OF PLATES. 
PuiatE I.—1. Darluca infested carnation leaves. Natural size. 
2. The same leaves enlarged three times. Purple spot at left (two 
leaves), dark spots in center and speck form at right. Photographed 
with yellow color screen, by author. 
Puate II.—Two Darluca infested leaves, enlarged sia times, show- 
ing Darluca spots. The Darluca pycnidia are the black specks scat- 
tered among the rust pustules, as at D and D’ Feom photograph 
by the author. 
Puiatp IiI.—1. Two pustules of rust (Uromyces caryophyllinus) 
showing pycnidia of Darluca filum imbedded among the uredospores. 
2. Isolated pycnidia of Darluca showing adherent filaments of 
Uromyces; showing also relative size of spores of Darluca and 
Uromyces and the variation in shape of Darluca pycmdia. 3. 
Gelatinous thread of Darluca spores. 4. Cross-section of a Darluca 
infested Uromyces pustule. 5. Darluca spores from gelatinous 
thread shown in Fig. 3. 6. Darluca spores germinating. All 
figures on this plate drawn with the aid of the camera lucida. 
