190 
INIycologia 
Uromyces ettphorbiicola Tranz. Ann. Myc. 8: 8. 1910. i 
Nigredo proeminens Arth. N. Am. Flora 7 : 259. 1912. j 
On Euphorbiaceae : | 
Chaniaesyce hirta (L.) Millsp. {Euphorbia hirta L., E. • 
pilulifera L.), Catano, Nov. 6, 4134; Vega Baja, Nov. 5, | 
4323 ; Lares, Nov. 22, 483P bis; Coamo Springs, Nov. * 
16, 4po6; Aricebo, Nov. 22, 5075; Aguado, Nov. 22, ^ 
3104; Guayama, Dec. 4, 333P; Rio Piedras, Nov. 13, ' 
5705; San German, Nov. 8, 3804; Guayanilla, Nov. 13, 
3868. j 
The species has also been collected on C. hirta at Mayagiiez, 
by G. P. Clinton in April, 1904, i6p, and at Camuy, by Under- 
wood & Griggs in July, 1901, ipp. 
Material has been examined from other West Indian islands 
as follows: Bahamas, on C. hypericifolia (L.) Millsp., C. pro- 
strata (Ait.) Small, and Poinsettia heterophylla (L.) Kl. & 
Garcke; Cuba, on P. heterophylla; Jamaica, on C. hirta (L.) 
Millsp., C. prostrata, C. serpens (H.B.K.) Small, and P. hetero- 
phylla; St. Croix, on C. prostrata; all of which collections but one 
are cited in the North American Flora, vol. 7, pp. 260, 261. 
29. Uromyces Janiphae (Wint.) comb. nov. 
Uredo Janiphae Wint. Grevillea 15 : 86. 1887. 
Uromyces dichrous Vesterg. IMicr. Rar. Sel. 1316. 1913. 
Hyponym. 
On Euphorbiaceae: 
Manihot Manihot (L.) Cockerell (M. ntilissima Pohl, 
Jatropha Manihot L., Janipha Manihot H.B.K.) , Vega 
Baja, Nov. 5, II, 4261. 
This rust appears to be common in the warm regions of 
America on various forms of the cultivated cassava. That it 
occurs in the Old World as well is probable, but I have seen no 
specimens. Winter’s description was founded on material col- 
lected near Sao-Francisco, Brazil, in 1887, by E. Ule 362. 
Vestergren’s material was collected by E. W. D. Holway at 
Guadalajara, Mexico, in 1903, and is the only collection known 
to the writer showing both uredinia and telia. The original num- 
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