Order VI. 
HEPATIC^ 
919 
these Hepaticaj difffer in being destitute of an operculum or lid to the theca, and, with the exception of 
Marchantia {d) and Jungermannia, of a calyptra. The order is composed of seven genera, all very different from 
each other, and forming an assemblage which is only natural in regard to the organs of vegetation. It does 
not appear possible to reconcile those of reproduction. The herbage consists of a variously dilated frond lying 
flat upon the substance on which it grows, generally naked, but in many Jungermannias covered with small 
leaves, which are often divided, but never really nerved, so that, in fact, tliey should ratlicr be considered 
dilatations of the frond : the substance is generally loosely cellular, sometimes compact, as in Marchantia, in 
which Hooker asserts that pores of the epidermis exist. 
2253. Jungermannia. Theca 4-valved, supported on a peduncle longer than the calyx. Valves free. 
2254. Marchantia. Theca on the under surface of a common peltate pedunculate receptacle. Anthers im- 
bedded in the disk of distinct peltate pedunculate or sessile receptacles. 
2255. Riccia. Theca^pherical, immersed in the frond (not opening), crowned with the style, which is alone 
protruded. 
2256. Anthoceros. Theca stalked, linear, 2-valved, with a central columella to which the sporules are 
attached. 
2257 Targionia. Perianth ? globose, arising from the underside of the extremity of tlie frond, at length 
opening vertically into 2-valves. Theca globose, nearly sessile, included in the perianth, opening irregularly at 
the extremity, and filled with spiral filaments. 
2258. Splicer ocarpus. ThecEe minute, spherical, seated upon obpyriform receptacles, and filled with miiuite 
sporules unmixed with filaments.^ 
A. Leafy. 
t Stipules none. 
* Leaves inserted many ivays. 
14927 Stem creep, irregul. branch. Lvs. imbricated on all sides setace. joint, straight, Fr. term. : mouth contract. 
14928 Stem creep, pinnated, branch. Lvs. imbricat. on all sides setace. joint, incurv. Fr. term. : mouth expanded 
14929 Leaves quadrifarious ovate closely imbricated erect acutely bifid, Theca terminal plaited at end 
14930 Stem erect nearly simple filif. Lvs. dist. quadrifar. ov. somew. keel, acutely bif. Fr. term. Cal. somew. plait. 
14931 Lvs. quadrifarious falcato-secund lin.-lanc. bipart. : segments straight acum. Fr. terminal, Cal. ovate leafy 
14932 Leaves imbricated on all sides ovate or oblong-ovate here and there lobed and angled, Fr. teiTO. Cal. none 
Leaves bifarious. 
a Leaves u?idivided. 
14933 Leaves obovate roundish ciliate toothed subrecurved. Fruit term, and lateral, Cal. obi, compressed oblique 
14934 Lvs. obi. recurv. with margin on one side and apex dentato-spinul. Fr. lat. and axill. Cal. round, compr. 
14935 Stem erect flexuose nearly simple. Lower leaves smaller ovate entire : upper rounded-ovate or nearly 
square, with one or more spiniform teeth 
14936 Stem erect nearly simple filiform flexuose. Leaves closely imbricated nearly horizontal oblong ovate 
concave 2-toothed at end falcate 1-sided 
14937 Leaves elliptical ovate. Fruit terminal, Cal. oblong ovate acuminate : mouth contracted denticulated 
14938 Leaves spreading ovate-rounded. Fruit terminal, Cal. oblong cylindrical depressed and flat at the 
extremity : mouth much contracted cut and toothed 
149S9 Lvs. erect concave cord, circumvol. Fr. term, and axill. Cal. obi. ov. subplicate : mouth minute toothed 
14940 Lvs. orbicul. Fr. upon short prop, branches, Cal. obi. attenuat. at each extrem. : mouth contracted toothed 
14941 Lvs. orbicular margin. Fruit term. Cal. obov. compressed longitudin. quadrang. : mouth contract, toothed 
14942 Stem ascending simijle. Leaves orbicular. Fruit terminal, Cal. obi. ovate cylind. quadri. Theca spherical 
14943 Stem ascending flexuose dichotomous. Leaves rounded somewhat wavy. Fruit terminal, Cal. ovate angul. 
with a contracted 4-toothed orifice 
14944 Stem erect divided. Leaves orbicular : upper reniform appressed. Fruit terminal, Cal. immersed oblong 
fleshy with an open 4-toothed orifice 
b Leaves emarginate or bifid : segments equal. 
14945 Leaves loosely imbric. spreading obcordate emarginate. Fruit term. Cal. ovate toothed immersed in lvs. 
14946 Leaves very closely imbricated erect concave ovate obtuse emarginate. Fruit terminal, Cal. O 
14947 Leaves closely imbric. erect or spreading cordate ovate plane notched at extremity : their marg. recurv. 
14948 Lvs. roundish concave acutely bifid : segm. straight obt. Fruit term. Cal. obpyrif ; mouth contract, tooth. 
14949 Leaves spreading subquadrate deeply emarginate, Fruit terminal, Cal. oblong : mouth plaited toothed 
14950 Leaves spreading subquadrate obtusely and broadly emarginate : their sides incurved, Fruit terminal, 
Cal. oblong ; mouth contracted plaited toothed 
and Miscellaneous Particidars. 
botanist, who was born in 1572, and died in 1653, after having published a catalogue of the plants of the neigh- 
3 N 4 
