Parr 2; 1907] AECIDIACEAE 165 
Telia erumpent, usually definite, sometimes encircled by paraphyses. ‘Teliospores free, 
two-celled by transverse septum, sparsely verrucose; wall laminate, "inner layer firm, 
colored, outer layer gelatinous, translucent, overlaid by cuticle, pores two in each cell, 
usually lateral. 
Type species, Uvopyxis Amorphae (M. A. Curt.) Schrét. (on Amorpha sp.). 
Pores of urediniospores in zones, number definite. 
Pores in one zone; paraphyses absent. 1. U. sanguinea, 
Pores in two zones; paraphyses present, few. 2. U. texana,. 
Pores of urediniospores scattered, 6 or more. 
Gelatinous layer of teliospores pale amber-colored, swelling moderately. 
Pedicels of teliospores not swelling in water. 
Attached portion of pedicel about half length of spore, 
Attached portion of pedicel very short. 
Paraphyses numerous. 
_ Paraphyses none. 
Pedicels of teliospores swelling in water. 
Attached portion of pedicel remaining terete. 
Attached portion of pedicel becoming globoid. 
Gelatinous layer of teliospores colorless, swelling greatly. 
. U, Nissoliae, 
U.. Petalostemonts. 
U. Roseana, 
U. Daleae. 
U. Eysenhardtiae. 
. U. Amorphae. 
OAH AR w 
1. Uropyxis sanguinea (Peck) Arthur. 
Uromyces sanguineus Peck, Bot. Gaz. 4: 128. 1879. 
Puccinia mirabilissima Peck, Bot. Gaz. 6: 226. 1881. 
Uropyxis mirabilissima Magn, Ber. Deuts. Bot. Ges. 10: 193. 1892. 
Dicaeoma mirabilissimum Kuntze, Rev. Gen. 3: 469. 1898. 
O. Pycnia unknown. 
II. Uredinia hypophyllous, scattered or somewhat gregarious, on small discolored 
usually reddish spots, roundish or ovoid, 0.3-0.8 mm. long, soon partially or wholly 
naked by epidermis rupturing along one side or irregularly, cinnamon-brown, ruptured 
epidermis especially conspicuous; paraphyses none; urediniospores obovate, pyriform, or 
ellipsoid, 18-23 by 21-324, often narrowed at base and less often at apex; wall golden- 
yellow, medium thick, 2.5-3 4, finely and closely verrucose, pores 4, equatorial. 
III. Telia hypophyllous, at first arising from the uredinia, usually not plentiful, scat- 
tered, round, 0.3-0.5 mm. across, soon naked, pulvinate, ruptured epidermis usually incon- 
spicuous ; teliospores ellipsoid, 20-25 by 30-354, rounded at both ends, much constricted at 
septum ; wall laminate, chestnut-brown, uniformly thick, 3-5, gelatinous layer inconspic- 
uous, finely and closely verrucose, pores two in each cell and lateral ; pedicel colorless, per- 
sistent, uniform diameter, about 6, solid except at'base, 100-150 long. 
ON BERBERIDACEAE : : : 
Mahonia Aquifolium (Pursh) Nutt. (Berberis Aquifolium Pursh, &. repens Lindl., 2. 
nana Greene, Odostemon Aquifolium Rydb.), Arizona, California, Colorado, Idaho, 
Montana, Nebraska, New Mexico, South Dakota, Utah, Wyoming. 
Mahonia diversifolia Sweet (Berberts Aquifolium Lindl., Odostemon nutkanus Rydb.), 
Oregon, Washington. : ; 
Mahonia nervosa (Pursh) Nutt. (Berberis nervosa Pursh), California. 
Mahonia pinnata (Lag.) Fedde | Berberis pinnata Lag.), California; Guatemala. 
Mahonia pumila (Greene) Fedde (Berberis pumila Greene), Oregon. 
TYPE LOCALITY: Colorado, on Berberis Aguifolium. : : 
DISTRIBUTION: Throughout the mountain region from Wyoming and Washington south to 
Guatemala. 
ILLUSTRATIONS: Holway, N. Am. Ured.1: fi. 4, f. 8a-b; Ber. Deuts. Bot. Ges. 10: p/. 19, f. 1-7. 
ExsiccaTi: Ellis & Ev. Fungi Columb. 186, Ellis, N. Am. Fungi 1451; Ellis & Ev. N. Am. 
Fungi 1860, 2243; Sydow, Ured. 879, 1777; Griff. West Am. Fungi 265; Garrett, Fungi Utah 
10; Rab.-Wint. Fungi Eur. 3619. 
2. Uropyxis texana (Holway & Long) Arthur. 
Pucctinia texana Holway & Long, Bull. Torrey Club 29: 113. 1902. 
O. Pycnia unknown. 
Il. Uredinia hypophyllous, in small orbicular groups on discolored spots, roundish, 0.2- 
0.5mm. across, soon partially or wholly naked by epidermis rupturing along one side or irreg- 
ularly, cinnamon-brown, ruptured epidermis especially conspicuous ; paraphyses few, peri- 
pheral, inconspicuous, erect, terete, 10-14 by 25-40», wall colorless, smooth, thin 1 / ; 
ufediniospores obovate or globoid, 17-22 by 21-324; wall golden-yellow, medium thick, 
2-3 #, finely and closely verrucose, pores 8, in two zones of 4 each, equidistant from equator. 
