Musci Exoric1.—Burchelliani. 
BRYUM UMBRACULUM. 
Bryum caule elongato, foliis obovatis acutis marginatis 
undulatis serratis, nervo excurrente, capsula oblongo- 
cylindracea pendula. (Tas. CX XXIII.) 
Bryum Umbraculum. Burchell MSS. 
Has. Terrestre, inumbrosis sylvarum densarum regionis Aute- 
niqualand Africe meridionalis ; satis copiose. D. Burchell. 
Caules inferne repentes, tomento fusco obsiti, ramosi, ramis erec- 
tis bipollicaribus, flexuosis, apice solummodo foliosis. Folia 
pregrandia, stellatim disposita, horizontaliter patentia, lurido- 
Viridia, inferne purpurascentia, obovata, acuta, undulata, mar- 
ginata, minute serrata, nervo ultra apicem in apiculum brevem 
producto. Sudlstantia satis crassa, areolis parvis oblongis re- 
. ticulata. Sete solitarie vel non raro 3 ad 5 ex eodem caule, 
subpollicares, rufee. Capsula oblongo-cylindracea, pendula, 
intense rufo-fusca. Peristomium ext. dentibus luteo-fuscis, 
int, membrana reticulata, sedecim-dentata, dentibus perfora- 
tis, cum ciliis 2 vel 3 interpositis. 
ti 
Were it not for the margined leaves which are but faintly ser- 
rated, and the very long almost cylindrical capsule, it would be 
hard to distinguish this species from Brywm roseum. These cha- 
racters are however constant, and must surely be considered suf- 
ficient to constitute it a distinct plant. The leaves are perhaps 
the largest of any known moss. © In the centre of some of the 
foliage { find the Hedwigian female flowers, containing, besides 
the pistils, jointed filaments, both of a reddish brown colour. 
Fig. 1, 1, plants, and Fig. 2, 2, 2, leaves, nat. size. Fig. 3, 
leaves. Fig. 4, portion of a leaf. Fig. 5, ext, teeth of peristome. 
Fig. 6, portion of inner ditto. Fig. 7, parts of the female flower. 
—magn. 
