ARTHUR AND JOHNSTON: UREDINALES OF CUBA 149 
have sometimes been referred to it, but they should more likely 
be associated with Uromyces Scirpi (Cast. Burr. There are а 
number of reasons for thinking that the present species possesses 
only pycnia, uredinia, and telia. 
The record for Cuba is based upon a phanerogamic collection 
in the herbarium of the N. Y. Bot. Garden from Guanabaco (Prov. 
Habana), April 2, 1910, II, Britton, Earle & Wilson 6249. No 
other West Indian station was known, until the 1916 collections 
by Whetzel and Olive in Porto Rico, although the rust is common 
along the eastern coast of both North and South America, notably 
in Central America. 
86. Puccinia Johnstonii Arthur sp. nov. 
ON SAPOTACEAE: 
Dipholis salicifolia (L.) A. DC., San Diego de los Bafios 
(Prov. Pinar del Rio), Feb. 7, 1915, II, III, Johnston 177 
_ (type). 
Sideroxylon foetidissimum L., Santiago de las Vegas, Feb. 
27, 1916, II, III, Johnston 489. 
Uredinia hypophyllous, scattered, pustular, small, 0.2-0.3 
mm. across, subepidermal, tardily naked, at first opening by a 
pore, becoming pulverulent, cinnamon-brown, the overarching 
epidermis quite persistent; paraphyses peripheral in a single row, 
erect, arising from a short membranous base, 2 or 3 cells deep, terete, 
colorless, 10-13 и broad by 37-77 и long, the inner wall thin, about 
Іш, the outer wall thicker, 3-7 и; urediniospores ellipsoid or broadly 
obovate, 23-29 by 37—48 и; wall cinnamon-brown, 1.5-2 и thick, 
thicker above, 5-9 u, with a lighter umbo, sparsely and strongly 
echinulate, the pores 4, sometimes 3, equatorial. 
Teliospores in uredinial sori ellipsoid or oblong, 23-30 by 33- 
40 u, rounded at both ends, not constricted at septum; wall dark 
chestnut-brown, uniformly 3 и thick, sparsely and coarsely echinu- 
late, the points 1-2 ш long; pedicel colorless, rough, то by 16-23 u, 
the upper part swelling in water up to 16 u, often attached some- 
what obliquely. 
An interesting species, showing some resemblances to Pro- 
spodium in the character of wall and sculpturing of the teliospores, 
Truly echinulate teliospores are a novelty among Uredinales. 
The circle of short and erect paraphyses, having a tissue-like base 
of somewhat elongated cells, is clearly a transitional structure be- 
tween a simple ring of paraphyses and a membranous peridium 
having ostiolar cells larger than the others. 
