Order IV. 
CRYPTOGAMIA M ARSILEACE.E. 
895 
14648 Fronds subulate half-cylinarical. Heads roundish 2.celled 
14649 Filiform branched creeping. Heads brown 
and Miscellaneous Particulars. 
2215. PUularia. From pilula, a pill. The little heads in which the reproductive organs are enclosed 
resemble pills. An obscure little plant found creeping among grass in meadows in many parts of England, 
and especially in damp places which are overflowed during winter. 
calyptra (d); if the calyptra is slit up one side it is called dimidiate{d), if divided at the base into many short clefts, 
it is termed mitriform (e). The orifice of the theca, when the operculum is removed, is either covered by a simple 
membrane, or by various processes called the peristome if), either annular, or in the form of teeth, and arranged 
in a single or double row. These processes vary in number, and in the manner of their division ; from such 
differences excellent characters for the genera have been obtained. 
The minute attention which mosses have received in modern times has brought their arrangement to a 
degree of perfection unknown in other Cryptogamic orders. This has been effected by the labor of Hooker, 
Greville, and Brown in our own country, and of Hedwig, Swartz, Bridel, Schwaegrichen, Palisot de Beauvois, 
Nees von Esenbeck, and Hornschuch abroad. The arrangement of the two last authors is chiefly adopted 
here from their excellent Bryologia Germanica. 
With this order, the alteration in the form of our page, of which we have already spoken, commences. The 
columns indicating the habit, habitation in the garden, propagation, and soil, are necessarily omitted ; and their 
place is supplied by a more extended pojDMtor cAa» arfer, and more detailed references to plates. The heights 
indicated are to be understood as in inches, and not as feet ; and the colors as the general color of the plant. 
In the figures it has been also found necessary to represent the plants in many cases much magnified ; when- 
ever this has taken place, the figures which are larger than nature are distinguished by a * affixed to their 
number. The popular synonyms of this and the succeeding orders have been rendered as complete as possible, 
especially with reference to Sowerby's English Botany, to which valuable work this will be a complete modern 
index even in Cryptogamia. 
Tribe I. EVAGINULATI. 
Theca entirely sessile ; its receptacle stalked, and without perichcetial leaves. 
2216. Sphagnum. Receptacle of theca stalked. Peduncle resembling a fruitstalk. Theca sessile on the 
receptacle. Mouth naked. 
Tribe II. VAGINULATI OLOCARPI. 
Theca more or less stalked : with perichcetial leaves ; not valvular. 
A. Theca terminal. 
* Theca indehiscent. 
2217. Phascum. Theca entire, adnate with the persistent lid. Calyptra shorter than the theca. 
