Uredinales of Indiana. III. LG 
Mt, Vernon, Posey Co., May 11, 1916; Cynthiana, Posey Co., July 17, 
1918, comm. E. P. Melborn. 
The latter collection was secured from a specimen of the grass which 
was sent to the Botanical Department of the Purdue University Agricul- 
tural Experiment Station for identification. The rust is a southern one 
and occurs also on Festuca octoflora, having a range from Indiana and 
Nebraska to Mississippi and Texas. 
The aecial stage has been shown through field cultures by Long and 
‘greenhouse cultures by Arthur to be on Nothoscordium bivalve (Mycologia 
8 :189-140. 1916) and should also be found in southern Indiana. 
167. URroMyces porosus (Pk.) Jackson, Brooklyn Bot. Gard. Mem. ] :281 
1918. 
Aecidium porosum Pk. Bot. Gaz. 3:54. 1878. 
Uromyces coloradensis EB. & FB. Erythea 1 :204. 1893. 
Uromycopsis porosa Arth. Résult. Sci. Congr. Bot. Vienne 345. 1906. 
I ON VICIA AMERICANA MUHBL. 
One mile east of Christman, Porter Co., June 3. 1916, C. C. Deam 20059. 
This is an autoecious rust possessing aecia and telia only. It is a west- 
ern form, the present collection being the most eastern one known. The 
aecia are from a distributed mycelium and hence easily separated from 
the more common U. Fabae, which occurs on the same host. 
Host INDEX. 
Hach species is given a number and these are consecutive for the three 
papers. The 1915 list includes nos. 1-141: the 1917 list nos. 142-155 and the 
present list nos. 156-167. In the first part of the present list the numbers 
refer to the same species as in the 1915 and 1917 lists. Numbers in black 
faced type indicate that the host is mentioned in the present paper. Num- 
bers in ordinary type indicate that the host is mentioned only in one of the 
two previous papers. Synonyms are in italies. 
Afzelia macrophylla 38 Amorpha canescens 141 
Agastache nepetoides 32 Anchistea virginica 157 
Agrimonia Hupatoria 15 Andropogon furcatus 42, 85 
hirsuta 15 scoparius 42, 57, 85 
mollis 15 Anemone cylindrica 28 
parviflora 15 quinquefolia 36, 135, 139 
rostellata 15 : virginiana 28, 51 
Agropyron repens 51, 81 Antirrhinum majus 44 
Smithii 51 Apocynum cannabinum 49 
Agrostis alba 81 Aquilegia sp. 51 
perennans 67 Arctium Lappa 21 
Aletris farinosa 41 minus 21 
Alopecurus aristulatus 81, 86 Arisaema Dracontium 109 
geniculatus 59 triphyllum 109 
Althaea rosea 34 Aristida gracilis 149 
Ambrosia trifida 40, 48 oligantha 149 
Amelanchier laevis x humilis 102 ramosissima 149 
