78 Witson: NortH AMERICAN PERONOSPORALES 
species it is by no means uncommon to find that a number of con- 
tiguous areolae are only imperfectly separated from each other by 
simple or even branched reticulations which end blindly before 
reaching the opposite side of the areola, thus producing a more 
or less complex labyrinth of ridges in place of the regular pen- 
_ tagonal or hexagonal reticulations which are typical of this group 
of species. The morphology of this species has been studied by 
Stevens. * 
On AMARANTHACEAE: 
Acnida tamariscina tuberculata (Moq.) Uline & Bray, Iowa, 
* Arthur. 
Amaranthus Bigelovii Uline & Bray, Texas, Heller 1867. 
Amaranthus blitoides S. Wats., California, Underwood ; Mon- 
tana, Reynolds ; Washington, * Suksdorf 182. 
Amaranthus emarginatus Salzm., Guadeloupe, Duss 4067. 
Amaranthus graecizans L., Montana, * Anderson. 
Amaranthus hybridus L., Alabama, Earle 2264; Florida, 
fitchcock 293 ; Illinois, Hart, * Waite ; Indiana, Under- 
wood (Ind. Fl. 99), Wilson; lowa, *Hitchcock ; Kansas, 
Norton 425; Missouri, Bush 316, * Tracy & Galloway; 
Nebraska, Williams ; New Jersey, * Halsted (Econ. Fungi 
352), * Stevens ; New York, Peck (Roum. Fungi Sel. 4557), 
Shear (N. Y. Fungi 198), Underwood ; Wisconsin, * Davis, 
Pammel, 
Amaranthus Palmeri S. Wats., New Mexico, Metcalfe 719; 
Chihuahua, *Pringle rrro ; Jalisco, Palmer. 
Amaranthus retroflexus L.., Alabama, Zar/e ; Illinois, Burrill, 
Earle ; Indiana, * Bolley, Olive; lowa, * Arthur ; Massa- 
chussetts, * Farlow (N. Am, Fungi 206), Seymour (Econ. 
Fungi 2546); New Jersey, * Stevens ; New York, Halsted 
(Econ. Fungi 35a), Jelliffe, Peck (Myc. Univ. 679), Under- 
wood 396 ; Ontario, Dearness (Fungi Columb. 46); South 
Dakota, * Griffiths (W. Am. Fungi 33); Wisconsin, 
Pammel. 
Amaranthus spinosus L., Illinois, * Farle ; Indiana, Rose; 
Louisiana, Ball 66> 7 emkas Long (Fungi Columb. 
* Bot. Gaz. 28: 149, 233- pl. 17-15. 1900. 
