[Vor. 8 
302 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
ing, in drying becoming vinaceous and at length deep brownish 
drab, somewhat translucent, the stem and adjacent surface 
drying minutely velvety with hairs 20-35 x 3-4 y; hymenium 
on the side opposite the stem, glabrous, even or with one or two 
shallow folds radiating from the stem; basidia flexuous,trans- 
verscly septate, 30-40 x 4 y; spores white in spore collection, 
simple, curved, 12 x 4 y. 
Fructifications 6-9 em. in diameter; stem, if present, up to 1 
em. long when growing. 
On logs of decaying balsa wood from Costa Rica, and in Cuba. 
This species may be recognized by its very thin, somewhat 
translucent, applanate, peltate, pendant or erect pilei of shell- 
pink color and texture of a rose petal when growing, and by the 
hymenium more even than in other species. 
This species should be compared with Auricularia lenta, 
described by Fries from specimens collected at Mirador, Brazil, 
and known to me from only the description, with which A. 
rosea agrees in several respects. 
Specimens examined: 
Costa Rica: on log from there, type (in Mo. Bot. Gard. Herb., 
57898). | 
Cuba: C. Wright, 286 (in Curtis Herb., under the name Hir- 
neola auriformis). 
There is another tropical Auricularia of more frequent oc- 
currence in herbaria than the preceding species. It is 
A. delicata (Fries) Hennings, Engler’s Bot. Jahrb. 17: 492. 
1893; Farlow, Bibl. Index N. Am. Fungi 1: 306. 1905; Lloyd, 
Myc. Writ. 5. Myc. Notes 55: 784. teat f. 1177. 1918. 
Plate 3, fig. 5. 
Laschia delicata Fries, Linnaea 5: 533. 1830; Epicr. 499. 
1838; R. Soc. Sci. Upsal. Acta III. 1: 105. 1851; Sace. Syll. 
Fung. 6: 407. 1888.—L. tremellosa Fries, Summa Veg. Scand. 
325 (foot note). 1849; R. Soc. Sci. Upsal. Acta III. 1: 105 (as 
synonym). 1851; Saec. Syll. Fung. 6: 407. 1888.—Auricularia 
tremellosa (Fries) Patouillard, Jour. de Bot. 1: 226. pl. 4. f. 9, 
10. 1887; Farlow, Bibl. Index N. Am. Fungi 1: 309. 1905. 
Illustrations: Lloyd, loc. cit.; Patouillard, loc. cit. 
Somewhat orbieular or shell-shaped, sessile and attached by 
