738 Witson: NortTH 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, 
Hitchcock 293 ; Mlinois, Hart, * Waite ; Indiana, Under- 
wood (Ind. Fl. 99), Wilson; Iowa, * Hitchcock ; Kansas, 
Norton 425; Missouri, Bush 316, * Tracy & Galloway » 
Nebraska, Williams ; New Jersey, * Halsted (Econ. Fung! 
352), * Stevens ; New York, Peck (Roum. Fungi Sel. 455 1), 
Shear (N. Y. Fungi 198), Underwood ; Wisconsin, * Davts, 
Pammel, 
Amaranthus Palmeri S. Wats., New Mexico, Metcalfe 7197 
Chihuahua, *Pringle rrz12_; Jalisco, Palmer. 
Amaranthus retroflexus L., Alabama, Earle ; Illinois, Burrill, 
rle ; Indiana, * Bolley, Olive ; lowa, * Arthur ; Massa- 
chussetts, * Farlow (N. Am. Fungi 206), Seymour feoniee 
Fungi 2546); New Jersey, * Stevens ; New York, Halste 
(Econ. Fungi 3542), Jelliffe, Peck (Myc. Univ. 679); — 
wood 396; Ontario, Dearness (Fungi Columb. 46); Sout 
Dakota, * Griffiths (W. Am. Fungi = ay; Wisconsin, 
Pammel. . 
Amaranthus spinosus L., Wlinois, * Earle; Indiana, Kose, 
Louisiana, Ball 662; Texas, * Long (Fungi Columb. 
oe ee 
- * Bot. Gaz. a8: 149, 233. #:. 17-75. 1900. 
