Part 2, 1907] UREDINACEAE 121 
8. Melampsoropsis Chiogenis (Dietel) Arth. Résult. Sci. Congr. Bot. 
Vienne 338. 1906. 
Chrysomyxa Chiogenis Dietel, Bot. Gaz. 19: 303. 1894. 
O and I. Pyenia and aecia unknown. 
II. Uredinia hypophyllous, scattered, at first bullate, becoming 0.5-0.75 mm. across, 
roundish or irregular, flat, honey-yellow; peridium delicate, walls thin, smooth; ure- 
diniospores catenulate, oblong to linear-oblong, 14-21 by 22-404; wall colorless, coarsely 
verrucose with somewhat deciduous tubercles, medium thick, 2-3“, pores obscure; con- 
tents orange-yellow when fresh. 
III. Telia hypophyllous, loosely scattered, round, small, 0.2-0.4 mm. across, orange- 
yellow fading to very pale-yellow, soon naked, ruptured epidermis noticeable ; teliospores 
broadly oblong or squarish, 7-10 by 13-164, in a series 50-80 long; wall colorless, smooth, 
thin, ly. 
ON VACCINIACEAE : 
Chiogenes hispidula (\.) T. & G. (C. serpyllifolia Salisb.), Wisconsin; Newfoundland. 
TYPE LOCALITY : [Forest City], Wisconsin, on Chiogenes hispidula. 
DISTRIBUTION : Northern Wisconsin and Newfoundland. 
12. CRONARTIUM Fries, Obs. Myc. 1: 220. 1815. 
Hypodermium § Peridermium Link, Ges. Nat. Freunde Berlin Mag. 7: 29. 1815. 
Peridermium Schmidt & Kunze, Deuts. Schwimme 6: 4. 1817. 
Cycle of development includes pycnia, aecia, uredinia and telia, with distinct alter- 
nating phases; heteroecious. Pycnia and other sori subepidermal. 
Pycnia deep-seated, broad and flat. 
Aecia erumpent, inflated. Peridium membranous, rupturing at the sides rather than 
above, 2-4-cells thick, outer surface smooth, inner verrucose. Aeciospores ellipsoid; wall 
colorless, coarsely verrucose with deciduous tubercles, except a smooth spot on one side. 
Uredinia somewhat erumpent. Peridium moderately firm, rupturing above, upper part 
evanescent; peridial cells isodiametric. Urediniospores borne singly on pedicels, globoid 
to ellipsoid; wall nearly or quite colorless, echinulate, pores obscure. 
Telia erumpent, at first arising from uredinia, the catenulate spores adhering to form a 
much extended, cylindrical or filiform column, horny when dry. Teliospores oblong to fusi- 
form, one-celled ; wall slightly colored, thin, smooth. 
Type species, Cronartium asclepiadeum Fr. (on Asclepias sp.). 
Telial host belonging to family Myricaceae. 1. C. Comptoniae. 
Telial host belonging to family Fagaceae. 2. C. Quercus. 
Telial host belonging to family Grossulariaceae. 3. C. ribicola. 
Telial host belonging to family Santalaceae. 4, C. Comandrae. 
Telial host belonging to family Scrophulariaceae. 5. C. coleosportoides. 
1. Cronartium Comptoniae Arth. Bull. Torrey Club 33: 29. 1906. 
O and I. Pycnia and aecia unknown. 
HI. Uredinia hypophyllous, scattered, or somewhat gregarious, round, very small, 
about 0.1 mm. across, dehiscent by a central rupture, soon wide open and naked, pulveru- 
lent ; peridium rather firm, cells polygonal, at the sides with walls uniformly thin, about 14, 
at the top with the inner walls greatly thickened, up to10#; urediniospores oval or obovate, 
16-21 by 23-31; wall colorless, rather thick, 2.5, sparsely and finely echinulate. 
Ill. Telial columns hypophyllous, filiform, 40-100 thick, 0.5-2 mm. long; teliospores 
fusiform-oblong, 13-17 by 28-56, obtuse at both ends; walls nearly colorless, smooth, 
thin, 1-1.54. 
Ow MYRICACEAE : —— . 
Comptonia peregrina (\,.) Coult. (C. asplenifolia Gaertn., Myrica asplentfolia Endl.), 
Connecticut, Massachusetts, New Jersey, New York, North Carolina, Vermont. 
Myrica Gale ,., Maine ; Ontario. ; 
TYPE LOCALITY: Egg Harbor, New Jersey on Comptonia peregrina. 
DISTRIBUTION : Atlantic coast from No1ih Carolina northward into Canada. 
Exsiccati: Ellis & Ev. Fungi Columb. 1482, 1724; Ellis, N. Am. Fungi 285, Seym. & Earle, 
Econ. Fungi 216, 2/7. 
