+” A de 
1920] 
BURT—THELEPHORACEAE OF NORTH AMERICA. XII 88 
stipitate and merismatoid species, of which we have only 5 as 
against 23 in the warmer southern region. The stipitate and 
merismatoid species grow sometimes on dead wood and some- 
times on the ground; all 49 dimidiate and effuso-reflexed species 
grow on dead wood, causing its decay, and are distributed 24 
in the northern and 18 in the southern area, while 7 others are 
the species already mentioned as ranging over both north 
temperate and tropical areas. 
KEY TO THE SPECIES 
SI. Central- ye i species.—Pileus more or less infundibuliform, some- 
eply split on one side, usually stipitate; stem typically central 
or keep but lateral-stemmed forms are also present in many of t 
bins Ma RUE A 12 DEEEEEEEEEE 1 
SII. Lateral stemmed species.—Pileus dimidiate, flabelliform, or wedge-shaped 
fundibuliform—attenuated at the base into a more or less 
wx AO UTIMS. o ROUES INR A 9 
SIII. Morismatoid species.—Pileoli several, somewhat Eom wedge- 
or strap-shaped, borne on or along a common stem........... 2 
SIV. Sene "species, wholly lacking stem or wies base. oh pea dimidiate- 
sessi a umbonate sessile or reflexed, al growing n wood—man 
J whol ally resupinate e. .....o 3 
$I. CENTRAL-STEMMED SPECIES 
1. Fructifications solitary or gregarious ............ceceeceeccececccuceece 2 
1 iri qa eepitoe.......... AM PA 8 
with pileus always more ad Lua infundibuliform, lacking dimi- 
ia pes or other lateral-stemmed fo EAD AA wos wa ES 3 
2, Species having lat g less frequently 
TT FO ES T oe 5 
3. Neither cystidia nor gloeocystidia present; "m notradicated............. s. 
3. E MUN present; growing on the ground, 13-3 cm. high, 3 mm.-2c 
in South Carolina to Brazil..................... 3. S. dd 
3. Glocorystidia present; growing on wood; in West Indies 2 Dutc 
TERN 00 oc tuo VERRE . Surinamense 
3. Hairdike cystidia present; pileus white, 2-4 a. high; in New York to os 
n Alabama, Wa: shin ngton and California ............ 10. S. diaphanu 
3. Hair-like e stdin, present; pileus b ond aries than S. diaphanum, 3- 
mm bight in New Yo rk ere A TTS TOES 1. S. exiguum 
3. ol organs unknown; growing on the ground, with stem d ven] 
y a long radicated portion which penetrates deeply; in French Guiana 
T""-———— LA . S. macrorrhiza 
4. Growing on wood, 2-15 em. high and in pr; upper surface wit 
raised, radial ridges; in Gul pes to Bolivia......... 1.8. "3 c E 
4. Sepe] on wood, 6-11 cm. high and En diameter upper surface 
pileus and stem! fvelvaly; in h America. . .2. S. h i AB 
5. ipea por Ra nor gloeocystidia present; Pilous cartridge-buff to pinard- 
en fresh; in New NE US to North Carolina = Tennessee, 
bar ia Japen.........2«44 028088 50 M ....... . S. Bu rtia ianum 
QüMeseereriseceecsh[ sis NITIDE EDEN cic 27.8. mE 
5. ci A IE O A O enn aa 
5. G oeoeyslidia pr pue; noeystidis.. o O AN 
6. Pil soft, bibulous texture, 3-5 mm. broad, 5-7 Pi ag long; 
A ark and mosses in . A ae . quisquiliare 
