та METZGERIACEAE 
specimens. The above description has been completed from New 
York plants in herb. Underwood. 
2. RiccARDIA MAJOR (Nees) Lindb. Musc. Scand. 5. 1870. 
Aneura multifida major Nees, Naturgesch. Eur. Leberm. 3: 
450. 1838 
Thallus rather broad (main axis .66-1.7 mm. wide), the branch- 
ing sometimes regular and compact but more frequently loose and 
irregular, always pinnate or bipinnate ; ultimate branchlets usually 
sligntly biconvex but becoming plane or even concave ventrally 
or dorsally, the unistratose margin one cell in width, obsolete in 
the older portions: monoicous: androecium usually distant from 
9 branch, rather short, oblong or subovate, .23—6 х .17—.32 mm., 
furnished with an erect, translucent, crenulate margin апа bearing 
1-6 (usually 3) pairs of loculi: Ф branch broad, its margin mul- 
tilaciniate ; calyptra arcuate, clavate-cylindrical, 2.5-4.5 mm. high, 
.84-1.26 broad above, much roughened when young by short 
tubular trichomes, nearly smooth at maturity: capsule oblong- 
ellipsoidal, dark-brown or black; elater-bearers about 1-1 the 
length of the valves*; elaters mostly 290-500 и long, 12 и № 
maximum width, the spiral band disappearing in the gradually аё | 
tenuate ends, a few (from near the elater-bearers ?) 180 X 15 № 
obtuse; spores brown, minutely papillose, 14—18 и. 
Exsicc. Hep. Am. 26 (as Ancura pinnatifida Nees). 
Common in the Coast Range Mountains on moist banks and on 
logs and stones about streams. Mill Valley (1185, 1186), Marin 
Со. ; Cazadero (1212) and Duncan’s Mills (1213), Sonoma Со.; 
Ukiah (744), Navarro (Miss Edith 5. Byxbee), and Mendocino 
(550), Mendocino Co.; Blue Lake, Humboldt Co.; Hay Fork 
(1118), Trinity Co. 
5о far as California is concerned, this plant is usually very 
distinct from A. multifida ambrosioides and it has seemed conducive 
to clearness to follow Lindberg in treating the variety of Nees 45 
а Species. Yet it must be admitted, we think, that transitional 
forms do occur in California, though rarely. 
: Riccardia pinnatifida we do not yet recognize from California. 
Hep. Am. по. 26, from Marin Co. seems to go better with Riccar dia 
major. Riccardia pinnatifida differs from the latter species in the 5 
n measuring the “© elater-bearers ” the term is here restricted to the somewhat — 
com | 752 ; uh 
h age сойған made up of rigid tubes with annular or spiral thickenings and with | 
the free extremities rounded. | 
