DESCRIPTION OF THE PLATES. 
Plate I. 
General appearance of ears of Pennisetum typhoideum affected by 
Sclerospora graminicola (Sacc.) Schroet. 
Plate II. 
Effects of the fungus on the inflorescence of Pennisetum typhoideum. 
Fig. 1. 
Fig. 2. 
Fig. 3. 
Fig. 4 
Fig. 5. 
Fig. 6. 
Fig. 7. 
Fig. | 
Fig. 2 
Normal spikelet of Pennisetum: |. lower sterile glume ; 2 
upper sterile glume; 3 and 4 fertile glumes. P. palex. The 
upper floret is perfect, the lower male. X 7. 
Spikelets showing prolification. Figures and letters as 
before. X 1}. 
Pedicel with two spikelets arising above the involucre. 
That on the right and lateral bears two florets, f. 1. the lower, 
f. 2 the upper. That on the left and terminal bears three 
florets, f. 3., f. 4. and f. 5., 1. 1. lower sterile glumes ; 2. 2. 
upper sterile glumes; 3. 3. 3. 3. 3. fertile glumes; P. P. P. P., 
palee ; the floret, f.3. being without a palea. s.s.s.s. s. the 
axial leafy shoots in the centre of each floret. These consist of a 
small number of narrow leaves, inrolled and contorted. X 13. 
Hypertrophied bristles of the involucre. Natural size. 
Modified glumes from affected spikelets. Natural size. 
Modified stamens from affected spikelets. See text pp. 3 
and 4 for further description. X 2. 
Stamens carried up on the prolificated shoot. Natural size. 
Plate III. 
Apex of the floral axis of an affected spikelet, consisting of 
a cluster of bud-like structures on a branched stalk. X 16. 
Dissection of two spikelets borne on one pedicel, as in Plate 
Il, Fig. 3. i involucre of unaltered bristles; 1. and 2. lower and 
upper sterile glumes; 3. fertile glumes; P. palew, there being 
