Arthur: Uredinales of Porto Rico 
321 
Percy Wilson of the N. Y. Bot. Garden. It was also collected in 
Prov. Pinar del Rio, Cuba, on a phanerogamic specimen of E. 
havanense, Dec., 1911, by Percy Wilson 1156Q. 
The spores of the two Porto Rican collections measure 16-20 
by 21-27 /X, and largely are cinnamon-brown above and paler in 
color below. Most collections of the rust seen by the writer, and 
especially those on the same host as the type, E. Coca, have larger 
spores, 18-23 by 24-32 /i, which are concolorous. In a collection 
made by J. N. Rose 18916, in Bolivia, Aug. 16, 1914, only about 
half of the spores are paler below. In some sori taken from a 
phanerogamic specimen of E. areolatum 6449, in the N. Y. Bot. 
Garden, with the same data as no. 6448 above, many spores 
measure quite as long as those found on E. Coca. It may be 
assumed, therefore, that variation in size and color of spores is 
incidental. 
88. Uredo Hymenaeae Mayor, Mem. Soc. Neuch. Sci. 5: 585. 
1913- 
On Caesalpiniaceae : 
Hymenaea Courbaril L., Joyuda, March 31, 962; Maya- 
giiez. May 3, 7/57, Oct. 31, j 5 p 7 , 3901; Anasco, Sept. 
21, 3210, Oct. 12, 3575; Vega Baja, Nov. 5, 4324. 
This rust was described from Colombian material on an unde- 
termined species of Hymenaea. Dr. Stevens’s fine set doubtless 
makes the second lot to be collected. The rust exhibits character- 
istics of the subfamily Raveneliatae, in the elongated spore with 
equatorial pores. 
89. Uredo lutea sp. nov. 
Uredinia hypophyllous, abundantly scattered or in small groups 
on discolored spots, pustular, 0.3-0.7 mm. across, long covered by 
the brown overarching epidermis, finally sparingly pulverulent, 
subepidermal ; paraphyses none ; urediniospores pedicillate, 
irregularly ellipsoid or obovoid, 19-21 by 26-29 /x; wall cinnamon- 
brown, about 1.5 /X thick, moderately echinulate, the pores usually 
indistinct, 2 or rarely 3, equatorial. 
On Caesalpiniaceae: 
Cassia quinquangulata L. C. Rich., without locality or 
date, 404bis; Maricao, April 4, 704; Jayome Alto, Dec. 
3, 3633; Preston’s ranch near Naguabo, Dec. 31, 6762. 
