4 NORTH AMERICAN FLORA [VoLuME 3 
Perithecia echinulately arranged on a subglobose stroma. 19, ECHINODOTHIS. 
Spores muriform, 
Spores hyaline. 20. THYRONECTRIA. 
Spores brown. 21. THYRONECTROIDEA. 
1. HYPONECTRIA Sacc. Michelia 1: 250. 1878. 
Perithecia globose or subglobose, subepidermal, often becoming erumpent ; asci 8-spored; 
spores ellipsoid or subellipsoid, hyaline, simple. 
Type species, Sphaeria Buxt DC. 
Spores 5-6 x 1.5-24; on stems of Opuntia sp. 1. A. Cacti. 
Spores 10 X 2-2.5; on herbaceous stems. 2. H. dakotensis. 
1. Hyponectria Cacti (Ellis & Ev.) Seaver, Mycologia 1: 20. 1909. 
Nectriella Cacti Ellis & Ev. Jour. Myc. 8: 66. 1902. 
Perithecia minute, scattered, subepidermal, globose or subglobose, expanded above the 
epidermis into a disk-like ostiolum ; perithecia red, with the ostiolum lighter, whitish (in 
dried specimens), about 200” in diameter; asci cylindric or clavate, 40-50 344; 
spores 2-seriate, simple, hyaline, straight or curved, 5-6 & 1.5-2 h. 
"On stems of Opuntia sp. 
TYPE LOCALITY: Tuskegee, Alabama. 
DISTRIBUTION: Known only from the type locality. ' 
2. Hyponectria dakotensis Seaver, Mycologia1: 20. 1909. 
Perithecia scattered or occasionally 2 or more in close contact, subepidermal, becoming 
more or less erumpent, long covered by the thin, whitish epidermis of the host, scattered 
over whitish patches on the substratum but with no apparent superficial mycelial growth ; 
ostiolum forming a disk-like expansion above the surface of the epidermis with a distinct 
perforation in the center, slightly hairy, especially near the margin of the disk, where the 
hairs appear as a delicate fringe; perithecia 200 » in diameter; asci clavate, 30-45 & Su; 
spores mostly 2-seriate above, often 1-seriate below, fusoid, with usually 2 large oil-drops, 
and 1 or 2 smaller ones toward either end, 10 X 2-2.54; paraphyses present, delicate. 
On herbaceous stems (? Ambrosia). 
TYPE LOCALITY: Fargo, North Dakota. 
DISTRIBUTION: Known only from the type locality. 
ILLUSTRATION: Mycologial: fi. 2, f. 4. 
2. NECTRIELLA Nitschke; Fuckel, Symb. Myc. 175. 1869. 
Charonectria Sacc, Michelia 2: 72. 1880. 
Perithecia globose or subglobose, entirely subepidermal or erumpent-superficial ; asci 
8-spored ; spores hyaline, 1-septate. 
Type species, NVectriella Fuckelit Nitschke. 
Perithecia large, 400 « in diameter, pale-red. 
1, N. Pedicularis. 
Perithecia small, 175-200 » in diameter, scarlet. 2, N. 
Peponum, 
1. Nectriella Pedicularis (Tracy & Earle) Seaver, 
Mycologia 1: 46. 1909. 
Charonectria Pedicularis Tracy & Earle, in Greene, Pl. Baker. 1: 26. 1901. 
Perithecia scattered or gregarious, prominent but long covered by the thin epidermis, 
orbicular, at length subdepressed, bright coral-red, smooth, soft, perforated by an obscure 
ostiolum, 400 » in diameter; asci numerous, cylindric, with a stem-like base, 100 & 8 4; 
spores obliquely 1-seriate, hyaline, minutely granular within, 1-septate, subellipsoid, with 
acutish ends, 17 X44. 
On gead stems of Pedicularis crenulata Benth. 
TvPE LOCALITY: Bear Creek Divide, Colorado. 
DISTRIBUTION: Colorado. 
