1905) ARTHUR—RUSTS ON COMPOSITAE FROM MEXICO 197 
4. COLEOSPORIUM SOLIDAGINIS (Schw.) Thuem. 
On Aster pauciflorus Nutt., City of Mexico, Oct. 10, 1898, no. 3071 a. 
5. COLEOSPORIUM PARAPHYSATUM Diet. and Holw. 
On Liabum discolor Benth. and Hook., Guadalajara, Sept. 28, 1903, no. 5062. 
6. Coleosporium Dahliae, n. sp.—Uredosori hypophyllous, irreg- 
ularly scattered, round, o.5™™ across or less, soon naked, pulveru- 
lent; uredospores irregularly ellipsoid, 16-22 by 24-30m, wall color- 
less, rather thin, 2, closely and strongly verrucose: teleutosori 
hypophyllous, irregularly scattered, sometimes confluent, roundish, 
about 0.5™™ across, waxy; teleutospores oblong, 18-21 by 45-7op, 
rounded at both ends, early septate, bright orange-yellow fading to 
pale olive-yellow. 
On Dahlia variabilis (W.) Desf., in city park, Guadalajara, Oct. 6, 1903, no. 
5121. 
7, Coleosporium Steviae, n. sp.—Uredosori hypophyllous, scat- 
tered unevenly and often thickly, round, 0.25-0.5™™ across, early 
naked, pulverulent; uredospores ellipsoid to globoid, somewhat 
angular, 18-23 by 26-35, wall colorless, rather thin, 1.5-2, finely 
Yerrucose: teleutosori hypophyllous, scattered, often confluent, 
regularly orbicular, o. 2 5-0.5™™ across, waxy; teleutospores form- 
ing 4 single layer beneath the epidermis, cylindrical, 12-19 by $0-75# 
tuncate or rounded at both ends. 
On Stevia trachelioides (DC.) Hook., Nevada de Toluca, 3,000 ™ alt., Oct. 
ra) ho. 5159 (type): S. rhombifolia HBK., Amecameca, Oct. 20, 1903, no. 
¢ : Hondo, near City of Mexico, Oct. 4, 1899, no. 3565: S. viscida HBK., 
Cuernavaca, ce y > aa Oct. oh 1903, no. 5169: S. monardaejo e se 
cas oes we ce ke as Sol 
No, 3135, Sept. ios cane 8 i a siglo ce h wicks : es co 
5248; Santa Fé =e ss ri Ot ea ee 
, y of Mexico, Oct. 18, 1903, no. 5176. 
8. CRonartIUM PRAELONGUM Wint. 
On Eupatorium Sp., Orizaba, Oct. 8, 1898, no. 304r. 
ne ae Eupatorii, n. sp-—Spermogonia amphigenous, numer- 
itis a small groups, punctiform, rather COMSPACUGUE, 
sen ite pidermal, globoid, too-1s0# broad; ostiolar fila- 
ing agglutinate: teleutosori hypophyllous and caulico- 
