Handbook of British Hepaticae : containing descriptions and figures of the indigenous species of Marchantia, Jungermannia, Riccia and Anthoceros . 42. Old walls, rocks, and trunks. (Fr. March, April.) Grows in considerable patches. Stems 1 to 2or 3 inches long, flexuose, often pinnate, withstraggling branches,which are againshortly closely im-bricate in two rows,so as to concealthe upper part of the stem(fig. 42), unequally two-lobed, the upper lobe thelargest, alternate, ovate, ap-proaching round, slightlyconcave, margins incurved,entire, or here and there 44 4^ slightly tooth
Handbook of British Hepaticae : containing descriptions and figures of the indigenous species of Marchantia, Jungermannia, Riccia and Anthoceros . 42. Old walls, rocks, and trunks. (Fr. March, April.) Grows in considerable patches. Stems 1 to 2or 3 inches long, flexuose, often pinnate, withstraggling branches,which are againshortly closely im-bricate in two rows,so as to concealthe upper part of the stem(fig. 42), unequally two-lobed, the upper lobe thelargest, alternate, ovate, ap-proaching round, slightlyconcave, margins incurved,entire, or here and there 44 4^ slightly toothed, lower lobe strap-shaped, diagonallypressed to the surface of the upper, plane, marginsrecurved and entire. Colour, deep or blackishgreen, opaque. Perichsetial leaves like the cauline,but smaller, and the lobule proportionately larger,two to each calyx, stipules adpressed, oblong ovate,. 62 HANMiOOK OF 15RITISH HEPATIC/E. or ligulate, margin recurved and entire (fig. 43).Cal)rx ovate, compressed and flat, then erect, cylin-drical, mouth truncate, serrate, deep notch on oneside, half its length (figs. 44, 45). Capsule paleyellow brown. Elaters bispiral.—{Plate 2, fig. 18.) Porella rivularis, N. Branches simply pinnate, leaves entire,ovate, obtuse, decurved, shortly auriculate,auricule sometimes discrete, stipules semi-lunate, decurrent. Perianth two-lipped, mouthcrenate. Madothcca rivularis, Nees Eur. Leb. 3, ; Gott. and Rab. Exs. No. 371 ; CookeHep. f. 142. Porella rivularis, Carr. andPears. Exs. 131. On stones in streams. Tufts wide, loose, dark green, the youngershoots of a lively , 1 to 2 inches long,irregularly branched, scarcelypinnate, branches short, oblong-rounded, some-times a little narrower at thetop, quite entire (fig. 46), theirstructure densely and minutelycellular. The lower lobe ismore minute, in proportion tothe upper,
Size: 1677px × 1490px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorcookemcm, bookcentury1800, bookdecade1890, bookyear1894
