H E P A T IC Æ .
Found on the Continent, North America, &c.
O bs.—When floating the ribbon-like processes are long and
abundant, sometimes they are only faintly tinged purple ; when
growing on land, they frequently disappear, or are only few.
D e sc r ip t io n oe P late CCXXV.—Fig. 1. Plant natural size
(Lindenberg). 2 ,3 . Ditto (Bischoff). 4. Plant, slightly magnified
(Bischoff). 5. Cross-section of frond, magnified (Lindenberg).
6. Cross-seotion of portion of frond, showing immersed capsules,
magnified (Bischoff). 7. Ditto, showing antheridia (ditto). 8.
Epidermis, magnified (ditto). 9. Hair-like process, magnified
(ditto). 10. Capsule, magnified (ditto). 11. Toung spores,
magnified (ditto). 12. Spores, magnified (ditto).
Suborder IV. ANTHOCFEOTACEJE.
Genus 56. AWTHOCBROS, Mich.
Anthooeros, Mich. Gen. PI. (1729).
Fronds dark green or blackish, often orbicular; nearly plane
or with centre depressed, radiately lobate; lobes variously
divided; costa very wide, confluent, confused with the pagina;
texture lax, vesicular, with large chlorophyl granules, frequently
glandularly thickened at the apex or in streaks along the middle
■so as to appear nerved. Infloresoenoe monoicous or dioicous.
Involucre tubular. Capsule pedunculate, exserted, linear or
oylindrioal, very long, oblong, bivalved, furnished witlt a
columella. Elaters in a few species perfectly spiral, in most
only undulate or sinuate, simple or branohed, often geniculate,
more or less heteromorphous, fibres wanting or indistinct.
Spores papillose or smooth. Antheridia irregularly disposed on
the antical surface of the frond.
1. Anthoceros læ v is, L.
Anthooeros Imvis, Linn. Sp. pl. IGüG (175S).
Dioicous, cæspitose, small to medium size, dark green. Fronds
flat, smooth, without air-oavities ; lobate, lobes undulate, somewhat
orbicular, rounded, not laciniate; texture somewhat’fleshy,
epidermic cells 4 times smaller than the inner, 3 to 4 cells thick
near the middle of the frond ; radiculose, rootlets numerous, pale
dirty brown. Calyptra trumpet-shaped, 1 to 2 cells thick near
the middle, 3 to 4 near the base, mouth wide, repand, toothed,
rarely scariose. Capsule brown, dark brown to black when dry ;
spores yellowish-brown, flattish, angular, almost smooth ; elaters
rather short, geniculate, somewhat articulated. Androecia irregularly
dispersed over the face of the frond, oval; antheridia
oval, pale green, slightly stipitate, about 6 in each cavity.
D im e n s io n s .— Fronds J to J inch long and broad, '2 m m . to
•3 mm. thick ; calyptra 3' mm. long x L mm. broad, 2' mm. x
1- mm.; capsule f to 1 inch long; spores ’05 mm. diam.;
androecia ’3 mm. x '2 mm.
H a b .— Wet fields, damp roadsides, by the sides of ditches, &c.
Eare.
1. Stable Hobba, near Trereiffe, Newlyn Cliff, Trungle, Paul,
TF. Curnow. 3?, 5, 7?, 10, 12. In a cultivated field near Hever^
sham Railway Station; cultivated fields (sand and sandy-peat),
Nether Levens and Foulshaw, Westmorland, G. Stabler.
17a. Caithness, Eev. B. Lillie.
I. On a wet clay bank by the roadside, leading from Dingle
to Ventry, left-hand side of the road about a mile and a half from
Ventry, Undb. fl Moore, 1873. On a pathway in Burnham
Wood. Ventry, Lett fl McArdle, 1898.
Found on the Continent and in North America.
O b s . Distinguished from Anthocerospuncfatus hy its dioicous
inflorescence, the smooth surface of fronds, no air-cavities, lobes
rounded not laciniate, paler colour of the spores, which are not
echinate.