Fungi of the Marshall Islands — Rogers 
97 
McGuire, Lloydia 4: 31, pi. 4, fig. 73-74, 
1941; Martin, Iowa Univ. Studies in Nat. 
Hist. 18 (3): 37, 1944. Heterochaetella 
dubia (Bourd. and Galz.) Bourd. and Galz., 
Hym. Fr. 51, fig. 30 [1928]. 
On dead wood of Cocos nucifera. Ebon, 
IX.9.46, 1391. 
The fructification is distinctly cretaceous 
and, unlike that in most specimens of the 
species, clearly visible to the naked eye—and 
about as conspicuous as a thin dab of white¬ 
wash. Under the lens it is seen to consist of 
numerous more or less separated whitish 
conical spicules; under the microscope each 
of these may be seen to be composed of a 
number of parallel cystidia, surrounded and 
conglutinate by a film of indistinct hyphae 
which ascend for fully two thirds of the 
height of the spicule and bear on their sur¬ 
face cruciate-septate basidia with four very 
short epibasidia continued in long, subulate 
sterigmata. The cystidia of the Ebon speci¬ 
men differ somewhat from those developed 
in other collections; but as noted elsewhere, 
the same may be said of almost any speci¬ 
men: they are a variable lot. The cystidia, 
rather than being straight, thick-walled and 
with a narrow lumen at the base, and thin- 
walled and with a dilated lumen at the 
summit, as often in Peniophora sect. Tubuli- 
jerae, are contorted, often several times sep¬ 
tate, constricted at some septa or for the 
entire length of some of the segments, and 
with the wall only slightly thickened. They 
show considerable resemblance to those of 
Peniophora pallidula. Some, however, ap¬ 
proach the regularity of more typical Seba- 
cina dubia. Known from widely separated 
localities in temperate Europe and North 
America; reported by Martin [loc. cit .) from 
Brazil. 
23. Sebacina farinacea sp. nov. Fig. 1. 
Fructificatio viva alba, farinaceo-ceracea, mar- 
gine attenuate), zona peripherica sub lente e gran- 
ulis albis distinctis (cystidiis) composita, exoleta 
pallide griseo-pruinosa, sicca cretacea vel leviter 
sordida; hyphae nodoso-septatae, 1.5-3 A* diam.; 
paraphyses sparsi, tenues, ramosi; cystidia e cor- 
poribus cylindraceis 3-4 a* diam., valde granulis 
calcareis incrustatis, composita, stipitata, subfusi- 
formia, 20-33 X 7.5-10 a*; gloeocystidia linearia, 
irregularia, matura suco luteo granuloso suffulta, 
17-50 X 5-6 /^; basidia cruciato-septata, ellipsoi- 
dea vel oblonga, 14-16.5 (-18) X 8.5-11.5 a*, epi¬ 
basidia quattuor 2-2.5 A* diam., long, ad 16 a q 
gerentia; spo'rae oblongo-ellipsoideae vel obovatae, 
8-9.5 X 6-7 A*, per repetitionem germinantes. 
Fructification when fresh pure white, becoming 
slightly creamy (a little lighter than Cartridge 
Buff), adnate, separable in small bits, farinaceous- 
waxy, under the binocular with minutely farina¬ 
ceous surface, thinning out at the margin to a peri¬ 
pheral zone composed of minute white granules 
(cystidia) arising out of a thin transparent waxy 
film; old specimens grayish-pruinose; when dry 
chalky white to barely cream (paler than Ivory 
Yellow) or in older fructifications nearly as dark 
as Cartridge Buff; hyphae distinct, with clamps 
throughout, 1.5-3 A 1 ; paraphyses scattered, reach¬ 
ing the surface, mostly inconspicuous, the stalk 
linear, 2-3 A* in diameter, with peg-like or con¬ 
torted branches 1 a* in diameter; cystidia arising 
at the margin and later engulfed by the hymenium 
and lying at its base, composed of a subcylindric, 
thin-walled cell 3-4 a* in diameter and heavy coarse 
mineral incrustation, at maturity subfusiform, ob¬ 
tuse, stalked, 20-33 X 7.5-10 a*; gloeocystidia aris¬ 
ing near the base of the fructification, somewhat 
sinuous, irregularly inflated or constricted, thin- 
walled, the content early hyaline and homogene¬ 
ous, later yellow, granular, refractive, resinoid, 
17-50 X 5-6 a*; basidia subtended by a prolifer¬ 
ative clamp, ellipsoid, becoming oblong and trun¬ 
cate, 14-16.5 (-18) X 8.5-11.5 A*, longitudinally 
cruciate-septate, bearing 4 epibasidia 2-2.5 A* in 
diameter and up to 16 a* or more in length; spores 
oblong-ellipsoid to obovate, 8-9.5 X 6-7 A*, ger¬ 
minating by repetition. 
On dead fibrous leaf sheaths, leaf bases, 
and husks of Cocos nucifera. 
Hawaii: Oahu: University of Hawaii 
campus, Manoa, 11.12.46, I. A. Abbott and 
D. P. R. (D. P. R. 633); 11.17.46, 1132; 
III.20.46,1. A. Abbott and D. P. R. (D. P. R. 
1173), and 1176; III.31.46, 1243; VI.21.46, 
1327, 1328; X.29.46, 1884, type (in herb. 
D. P. R., BISH, SUI); X.30.46, 1888; 
XII.4.46, 1931. 
marshall islands: Ebon, IX. 10.46, 
1388. 
To the naked eye Sebacina farinacea pre¬ 
sents the appearance of one of the innumer¬ 
able small white Thelephoraceae—perhaps 
