112 
of this genus are as a rule 3-4 celled, and the uredospores are formed in 
the same way as in Phragmidium (and Puccinia). The tecidia of Bos - 
trupia are unfortunately not known, but judging from its great similar¬ 
ity to certain grass inhabiting Puccinias it is very probable that the 
secidia are formed as in Puccinia and Uromyces. A Puccinia with a 
Phragmidium-iecidium is not known, although it is not impossible that 
such a one exists. On the other band there is one Puccinia, or perhaps 
several, which shows a condition of the germ pores typical for Phrag¬ 
midium. 
There are several Uredinecc on Barberry species. Besides the well 
known aecidium of Puccinia poculi/ormis , Wettstein (P. graminis , Per 
soon), there probably occur three secidia upon Barberry, namely, Ae. 
Magelhcenicum , Berkeley,* eecidium of P. berberidis, Montague, and an 
secidium which appears to belong to a Diorcliidium frequent around Quito 
on Berberis glauca. The genus TJromyces is represented on Berberis 
(Mahonia) by one species, U, sanguineus. Besides the above mentioned, 
P. berberis , Mont., two Puccinias, P.mirabilissima , Pk. and P. antarctica , 
Speggazzini, have been observed on Barberry. Finally two uredo forms 
are found on Berberis, namely, U. cecidiiformis , Speggazzini and U. 
antarctica , Speggazzini. 
Pucciniamirabilissima was described bv Peck in the Botanical Gazette 
for 1881, p. 226. Tracy and Galloway gave further information con¬ 
cerning it in the Botanical Gazette for 1888, p. 126, and De Toni gives 
the following diagnosis of the species (Syll. Ured., p. 620). 
Maculis late purpureis 3-4 millimeter diameter, leuiter incrassatulis, pseudope- 
ridiis hypogenis, longis, pallide Uavis, margine grosse laceratis; mchliosporis sub- 
globosis, 15-20 ju diameter, tuberculatis; maculis parvis, punctiformibus vel majus- 
culis subrotundisque, superue atris vel atrobrunneis; soris kypophyllis, paucis, 
minutispallide rufescenti—brmmeis; uredosporis subglobosis, obovatis vel piriformi- 
bus, obtusis, minutissime rugulosis; 22-33 by 20-23 // pedicello liyalmo, deiu deciduo; 
teleutosporis immixtis, ellipticis, obtusis, ad septum constrictis, subtiliter rugosis, 
30-32 by 22-25 ju pedicello longissiiuo liyalino fultis. 
The species is found in several places in the United States on the 
leaves of Berberis repens 1 and has been distributed in Ellis’s North Amer¬ 
ican Fungi, No. 1451, and Rabenhorst-Winter-Pazschke’s Fungi Euro- 
paei, No. 3619. 
In the following I will give the results of my investigations with 
specimens distributed in Fungi Europsei. They were collected at 
Thompson Falls, Montana, September, 1884, by Seymour, and in Sierra 
Nevada,California, May, 1886, by Harkness. Uredo and teleutospores, 
but no mcidia, were present; the uredospores from the Montana speci¬ 
mens were more or less ovate, those from California piriform.f When 
treated with warm potash or lactic acid the epispore swelled up so 
*Aecidium yraveolens , Shuttlewortb, is really identical with Ae. Magelhcenicum 
Berkeley. 
t Compare Lagerliiem “L’acido lactique, excellent agent pour l’etudo (les cham¬ 
pignons secs” (Rev. Mycol. No. 42). Toulouse. 1889. 
