(Vow. 11 
28 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
а genus of the T'helephoraceae because the spores are borne in а 
whorl at the apex of the spore-bearing cell. Wolf, loc. cit., has 
presented the morphology and development of P. nigricans and 
concludes that Protocoronospora is not а Basidiomycete but one 
of the Melanconieae, a conclusion in which I concur. 
ASTEROSTROMA 
Asterostroma Massee, Linn. Soc. Bot. Jour. 25: 154. pl. 46, f. 
8,9. 1889; басе. Syll. Fung. 9: 236. 1891: Engl. & Prantl, Nat. 
Pflanzenfam. (1:1**): 122. 1898; Bourdot & Galzin, Soc. Myc. 
Fr. Bul. 36: 44. 1920. 
Fructifications resupinate, effused, dry, composed of loosely 
interwoven hyphae, some of which terminate in brown, stellate 
organs composed of slender rays; basidia simple, with 2—4 sterig- 
mata; spores hyaline. 
Тһе species of Asterostroma are likely to be referred to Corti- 
cium unless sections are examined. Іп sections the brown, stellate 
organs are conspieuous when viewed with the mieroscope and 
sharply separate Asterostroma from other resupinate thelephora- 
ceous fungi. Similar organs occur, however, in Asterodon of 
the Hydnaceae and in a species of Lachnocladium. 
KEY TO THE SPECIES 
No colored hyphae present in the айЫсшішп.,............................... 1 
Some colored hyphae in ворісшат.......................... 6. A. ochrostroma 
1. Spores- becoming wchinulate... 2235 nur a ss ee 2 
Әроме атыса. eee 3 
2. Stellate organs with unbranched rays as a rule.............. . А. cervicolor 
2. Many stellate organs have some rays branched. ........... 2. = muscicolum 
3. "raain drying whitish; no cystidia; rays 314-414 и in diam- 
ee ore ee Ры ыт 2. 
3. ud A. bicolor ас € rays up to 130 X 9 » protrude == 
menium, like өсіне... 4. А. spiniferum 
3. Stellate organs have eat long, slender rays up to 100-150 > x 
3-314 u;fructifieation not вропру.................... . А. gracile 
l. Asterostroma cervicolor (Berk. & Curtis) Massee, Linn. 
Soc. Bot. Jour. 25: 155. 1889; басс. Syll. Fung. 9: 237. 1891; 
Bourdot & Galzin, Soc. Мус. Fr. Bul. 36: 44. 1920. 
Corticium cervicolor Berk. & Curtis, Grevillea 1: 179. 1873; 
басс. Syll. Fung. 6: 621. 1888.—Asterostroma corticola Massee, 
Linn. Soc. Bot. Jour. 25: 155. 1889; Sacc. Syll. Fung. 9: 236. 
