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Muscr Exortct.-—Burchelliani. 
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BRYUM UMBRACULUM. 
Bryum caule elongato, foliis obovatis acutis marginatis 
undulatis serratis, nervo excurrente, capsula oblongo- 
cylindracea pendula. (Tas. CXXXIII.) 
Bryum Umbraculum. Burchell MSS. 
Has. Terrestre, in umbrosis sylvarum densarum regionis 4ute- 
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. Substantia satis crassa, areolis parvis oblongis re- 
ticulata. Sete solitariz vel non raro 3 ad 5 ex eodem caule, 
subpollicares, ruf. 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. 
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 Bryuwm 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. 
