1897 | BRIEFER AKTICEES 371 
The two species which the plant under consideration most nearly 
resembles are Acrospermum viridulum B. and C. (but the apothecia, asci, 
and spores of the new plant are too large to justify its classification 
here) and Acrospermum fultum Harkn. (but the shape of the apothe- 
cium and measurements of the paraphyses exclude it from this species). 
Acrospermum urceolatum, n. sp. — Apothecia solitary or aggregated 
into small groups, elongated vestically, stalked when mature, with dis- 
tinct ostiole, below somewhat compressed, giving a vaselike appear- 
ance; young apothecia approximately hemispherical, lengthening and 
becoming club shaped before the appearance of the ostiole, dark olive 
green, upper part covered with white granular tomentum, 550—800p in 
length by 220-400p in diameter at the widest part ; asci many, elongated 
and cylindrical, tapering at the lower end, crowded closely together, of 
nearly the same length as the body of the perithecium, 220-350» X 
5-8, accompanied by delicate threadlike unseptate paraphyses 1.3 
in diameter and one-third to one-fourth the length of the asci; spores 
hyaline, filiform, very slender, 1.6m in diameter, of the same length as 
the ascus, multiseptate, generally curved, rarely lying straight through- 
out the length of the ascus 
On leaves of Selaginella rupestris (Linn.) Spring. Taylors Falls, 
Minnesota. Coll. Conway MacMillan. August 1896—Mary E. 
OLson, University of Minnesota. | 
EXPLANATION OF PLATE XXIX. 
1. Appearance of mature sages on a branch of the host, showing 
ostiole sink d granular tomentum (dry). 38. 
_ Fig. 2. Mature and mcrae Sees attached to the host by dense 
mycelial weft (water mount). X 5 
Fic. 3. Mycelium.  3354- 
1G. 4. Group of apothecia connected by mycelial mat. 38. 
: ‘IG. 5. Young apothecia growing on a sporophyll, grouped —— 
- Sporangium of the host. 
Su Fig. 6. Mature apothecia. aeakced | in KOH, showing arrangement of the 
asl. X 134. 
vay) Pie a es orca. xX 334. 
a Fig. 8. Three mature and three young asci, with paper io | 
eo by . within the asci. x 334. 
Fig. 9. Ascus broken, showing the ends of six spores. 334- 
“age To. / Cross —— asci, sore’ the number of sR ue = 
