1918] 
ZELLER AND DODGE—RHIZOPOGON 11 
Vet.-Soe. Bidrag Natur och Folk 25 : 354. 1876. (Myc. Fenn. 
3 : 354. 1876). 
Splanchnomyces luteolus Corda, Icones Fung. 6: 38. pl. 7. 
f. 69. 1854.—Splanchnomyces Rabenhorstit Corda, Ibid. 6: 
39-40. pl. 8. f. 73. 1854.—8S planchnomyces Cauvinianus Corda, 
Ibid. 6:39. pl. 8. f. 72. 1854.—Hysterangium Duriaeanum 
Tulasne, Actes Soc. Linn. de Bordeaux 13 : 263. 1844. 
Illustrations: Hesse, Hypog. Deutschl. 1: pl. 2. f. 1-4, pl. 5. 
f. 5-7, pl. 9. f. 26; Tulasne, Fung. Hypog. pl. 1. f. 5, pl. 11. 
f..5. 
Type: location unknown, but a specimen from Lloyd which 
we have studied is from the type locality. 
Fructifications subglobose to oblong and often pear-shaped, 
diameter up to 3 cm. when dry, color warm buff to mummy- 
brown when dry; odor weak at first and later stercoreous 
(Tulasne); fibrils numerous but not prominent, fine, elastic, 
about the same color as the peridium or darker, composed of 
septate hyphae, innate-appressed above and not very prom- 
inent below; peridium thick, 240-400 y, simplex, context 
meshy and quite loose, stupose, ochraceous-buff to ochraceous- 
tawny under the microscope; gleba white at first, then yel- 
lowish when dry; cavities narrowly labyrinthiform, empty 
or filled with spores where the cavities are small; septa nar- 
row, 30-60 и, made up of hyaline, branched hyphae mostly ex- 
tending parallel with the surface of the hymenium, becom- 
ing scissile early; basidia clavate, 12-139-10 y, hyaline; 
sterigmata as long as the spores; spores acrogenous, dis- 
tinctly colored, ochraceous-tawny, ellipsoidal, 7-163-5 и, 
smooth. 
In sandy coniferous woods. Cosmopolitan. 
Jamaica material collected by F. S. Earle, 358, does not 
agree in all characters with the other R. luteolus material. 
This form has a thinner peridium and less numerous fibrils 
than in other specimens. No field notes accompany this col- 
lection. The colors when fresh are characters which are very 
desirable in the separation of species like R. rubescens and 
R. luteolus. 
