1899] 
Burt, — Vermont Helvelleae 
65 
Mitrula. 
17. Mitrula olivacea (Pers.) Sacc. Fructifications gregarious or 
caespitose, 2-4^ cm. high, hollow, very irregularly compressed, slimy 
or greasy to the touch but not viscid; ascigerous portion tawny-oliva¬ 
ceous, or greenish umbrinus, glabrous; stem paler than the ascigerous 
portion and more olivaceous, glabrous, shining; spores slightly curved, 
usually 4-5-guttulate and simple, but in an old specimen just beginning 
to decay rarely 3-septate, 15 x 5 /x. (Figs. 11-11^.) Geoglossum oliva¬ 
ceum Pers.; Leptoglossum olivaceum (Pers.) Cke. 
In wood road, Grand View Mt. ( Burt ). August 26. 
The spore dimensions agree with those given by Rehm in Raben- 
horst’s Pilze and by Massee, but are smaller than stated in Phillips’ 
Discomycetes or in Saccardo’s Sylloge (25 x 8 /x). Through the kind¬ 
ness of Dr. Farlow I have been permitted to compare our specimens 
with European specimens of the closely related species Mitrula viridis 
and M. olivacea , distributed as Leotia viridis (Pers.) in Kunze’s Fun. 
sel. No. 196 and Leptoglossum olivaceum (Pers.) in Phillips’Elv. Brit. 
No. 5. Our specimens are referred to M. olivacea on account of the 
glabrous stem. I am not aware that this species has been found hereto¬ 
fore in N. America ; M. viridis , which has the stem minutely squamulose 
or granulose, is reported for S. Carolina and Pennsylvania. 
18. Mitrula laricina (Villars) Massee. Fructifications gregarious, 
2-6 cm. high; ascigerous portion broadly ovoid or subglobose, often 
more or less compressed, egg-yellow to orange-red, hollow; stem white 
or with a tinge of pink or yellow; spores 14-20 x 3 /x. Mitrula phal- 
loides (Bull.)Chev.; Mitrula paludosa Fr. 
On leaves in drying pools, Abby Pond, Ripton (Burt). June 26. 
19. Mitrula vitellina (Bres.) var. irregularis Pk. Fructifications 
2^-5 cm. high; ascigerous portion clavate, often irregular or com¬ 
pressed and somewhat lobed, tapering below into the short, rather 
distinct, yellowish or whitish stem; spores uniseriate, 10x5 /x. 
In path on the western ascent of Mt. Mansfield* (Z. R. Jones & Burt ). 
September 8. 
Specimen seen by Mr. Peck and determination authenticated. 
20. Mitrula rufa (Schw.) Massee. Fructifications gregarious or 
scattered, 3-5 cm. high, varying in color from rufous or dusky brownish 
olive to dingy yellow; ascigerous portion narrowly ellipsoidal or clavate, 
often more or less laterally compressed and longitudinally rugulose, 
glabrous, 1-2 cm. long, 4-7 mm. broad, not sharply differentiated from 
the thinner, and usually paler, minutely squamulose stem; spores 8, ir¬ 
regularly 2-seriate, hyaline, slightly curved, 25—35 x 5-6 /x, at first 
multiguttulate, finally 5-septate, paraphyses with tips slightly thickened 
and more or less curved. Geoglossum rufum Schw.; Mitrula lutea 
Mont.; Geoglossum luteum Pk.; Mitrula lutescens B. & C.; and Geo¬ 
glossum pistillaids B. & Cke. are given as synonyms by Massee, the types 
