Asexual Reproduction in Hcpaticae. 
157 
an important part in the propagation of these plants, especially in 
the case of species which are seldom found in fruit. 
In the subjoined list, the principal characters of the gemmae 
are briefly noted. Except where otherwise stated, the species 
occur in the British Islands, the families being given in accordance 
7 o o 
with the system proposed by Spruce 1 and adoped by Schiffner. 2 
Earn. I. Epigoniautheae. Marsupella emarginata. Gemmae 
ovoid, 1-2-celled, pale brown, on leaf-margins, especially those 
near top of stem. 
Lophozia bavbata, L. intermedia, L. orcadensis, L. porph/roleuca, 
L. ventricosa. G. triangular or polygonal, 2-3-celled, in brown 
masses on tips of uppermost leaves. 
L. exsecta, L. Helleriana. G. ovoid, 1-3-celled in dark-red 
masses on uppermost leaves In L. exsectaeformis, however, the 
gemmae are triangular and 1-celled.” 
L. heterocolpa. G. ovoid, 1-2-celled, in a large reddish mass 
at stem-apex, surrounded by uppermost leaves. 
L. incisa. G. polygonal, 1-celled, in yellowish masses on the 
crowded terminal leaves. 
L. minuta. G. ovoid, 1-celled, in small brown masses on the 
leaves of special slender shoots. 
Lophocolea bidentata , L. heterophylla. G. occur either as 
isolated spherical or ovoid cells on leaf-margins, or as irregular 
masses on the upper leaves and the tops of erect shoots. 
Mylia Taylori, M. anomala. G. ovoid or elongated, 1-2-celled, 
in dark-green masses on uppermost leaves, singly on the lower ones. 
Fam. 2. Trigonantheae. Cephalozia bicuspidata, C. catenulata , 
C. dentata, C. divaricata. G. spherical or ovoid, 1-2-celled, in light- 
green masses on the summit of ereet shoots, and on margins of 
uppermost leaves (Fig. 6). 
C. Francisci. G. triangular, 2-celled, in reddish masses on the 
tips of the uppermost leaves of slender shoots. 
C. Starkii. G. ovoid, 1-2-celled, in brown masses on tips of 
upper leaves. 
Nowellia curvifolia. G. spherical, 1-celled, scattered on mar¬ 
gins of upper leaves. 
Odontosehisma Sphagni , O. denudatum. G. spherical or ovoid, 
1 -2-celled, in masses at the ends of slender small-leaved branches. 
1 Spruce, R., Ilepaticae Amazonicae et Audinae. Trans. Bot. 
vSoc., Edinburgh, Vol. 15. 1885. 
2 ScliifFner, V., ilepaticae. Kugler u Prautl, Nat. Pflauzen- 
fauiiiieu, Teil. 1, Abt. 3, 1893. 
