1918] JACKSON—PUCCINIA 299 
Only one collection of this species has been recorded, on V. flexuosa from 
Buenos Aires, November 1907. No material has been available for study, and 
its relation to the other species cannot be stated with any degree of accuracy. 
Telia only are described, the spores being “obscure fusco-ferrugineae superne 
obtusae inferne subcuneatae (20-25 by 45-som) .... non v. leniter 
constrictae, episporio ad vesticem sat incrassato.” The discrustioni of the sori 
would not suggest a micro- or lepto-form, and it is probable that other stages 
exist. 
12, PUCCINIA FUSCELLA Arthur and Johnston, Mem. Torr. Bot. 
Club 157. 1918. 
On Vernonia menthaefolia Less., El Yunque Baracoa, Cuba, March 10, 
1903, E. W. D. Holway; Baracoa, April 14, 1916, J. R. Johnston 584 (type). 
This species has formerly been confused with P. Vernoniae Schw. (cf. 13). 
It differs, however, in well marked characters, especially in the distribution of 
the pores in the urediniospores, which are 4-6 and scattered, while in P. Ver- 
noniae they are 3 and equatorial. The species is known only from Cuba. The 
first mentioned specimen was issued as no. 772 in Barth. N. A. Ured. as on 
V. longifolia. 
13. PucCINIA VERNONIAE Schw. Proc. Am. Phil. Soc. II. 4: 296. 
1832.—P. bullata Schw. Schrift. Nat. Gesell. Leipzig 1:74. 1822; 
not P. bullata Lk. 1815 or Schroet. 1879; P. tanaceti Vernoniae 
Burr. Ill. Lab. Nat. Hist. 2:186. 1885; P. Vernoniae longipes 
Diet. Jour. Mycol. 7:43. 1891; P. Vernoniae brevipes Diet. Mycol. 
7:43. 1891; P. longipes Lagerh. Tromsé Mus. Aarsh. 17:64. 
1895; Dicaeoma longipes Kuntze, Rev. Gen. 3:469. 1898; Bul- 
laria Vernoniae Arth. Mycol. 42302. 1917. 
O. Pycnia epiphyllous, few, scattered among the uredinia, small, 
punctiform, subepidermal, honey yellow, becoming brown, globose, 
112 u in diameter by 120-130 in height; ostiolar filaments free. 
II. Primary uredinia chiefly epiphyllous, rather numerous, 
crowded in groups up to 4 mm. in length, often confluent, small, 
round, o.3-0.5 mm. across, rather early naked, pulverulent, 
cinnamon brown, ruptured epidermis inconspicuous; secondary 
uredinia amphigenous, often gregarious like the primary on yellow 
spots, or more often scattered, small, 0, 2-o.5 mm. across, ruptured 
epidermis often conspicuous; urediniospores obovoid or broadly 
ellipsoid, 20-26 by 22-30 u; wall cinnamon brown, 1.5~3 » thick, 
moderately to sparsely and prominently echinulate; pores 3, 
approximately equatorial. 
