180 ANTHOCEROTACEAE 
mm. in thickness), terminated by a globose or ellipsoidal tuber, 
the latter .25-1 mm. in diameter, pale when living, yellowish- 
brown on drying, becoming finally closely covered with root-hairs ; 
thallus 10-16 cells thick in region of costa, passing gradually or 
rather abruptly into the more ог less extended 5—3-stratose mar- 
ginal lamina; surface-cells rhombic to rhombic-oblong, 33-66 и 
X 20-33 м, indistinct after drying : involucres separate, cy lindrical, 
1.7-2 mm. x .5 mm., smooth, truncate, entire ог slightly repand 
at the mouth. 
On compact soil in a nearly level open plot about fifty feet 
north of “The Old Mill,” Mill Valley, Marin Co., California 
(Howe: Mar. 19, 1892, and Feb. 22, 1896; the latter, which 
bears the involucres, we consider the type). Also collected by 
Dr. Bolander at “Oakland, on slides near the bay." The few 
capsules that have been seen are very immature, projecting only 
about 1 mm. beyond the mouth of the involucre, and it is quite 
possible that the description of the involucre given above will need 
some modification on the discovery of fully ripened sporogonia. 
Itis practically certain that this species is, in part, at least, 
what Austin referred provisionally to Anthoceros caespiticius De 
Not. (Bull. Torr. Bot. Club, 6: 26. 1875), drawing his description, 
however, “from a specimen in herb. Torrey under the name 2. 
laevis Linn., from the Island of Corsica.” We had thought to 
take up for A. phymatodes the specific name 7orreyi Aust. М5.. 
which appears in parenthesis after A. caespiticius in the place cited, 
but an examination of the Austin collection, so generously loaned 
by Mr. Pearson, showed the manuscript diagnosis of A. Torreyt 
affixed to a scrap of the Corsican plant (which we refer to Antho- 
ceros dichotomus Raddi) and that plant alone alluded to at the close 
of the description. А. Torreyi Aust. MS. is therefore а зупопут 
of A. dichotomus and not of A. phymatodes. Воһапдег 8 specimen 
15 accompanied by a slip of brown paper оп which is written— 
evidently by himself—< Oakland on slides near the bay,” but it i5 
gs in the Austin collection glued to Austin's manuscript de- 
seripuon of A. Lescurit from New Orleans, the evident type of 
не ich appears in the same collection under the name of A. Ludo- 
vicianus. 
Anthoceros phymatodes is a near ally of A. dichotomus Raddi, 
Specimens of which from Raddi’s herbarium we have had the 
