TAB. XCVII. 
Trichomanes Pluma, Hook. 
Hispidulo-scabra, frondibus lanceolatis sublongo-stipitatis 
nigris decomposito-pinnatifidis, laciniis teretibus filiformi- 
subulatis confervoideis reticulatis, involucris versus apicem 
frondis praecipue sitis parvis cyathiformibus in ramulis 
brevibus terminalibus, receptaculo longissime exserto, soris 
inclusis, caudice repente setaceo-squamoso. 
Hab. Borneo, near Sarawak, Mr. Thomas Loibh. 
This is only one of the many extremely interesting plants 
in a collection, for which I am indebted to Mr. Veitch of the 
Exotic Nurseries, Exeter and Chelsea, made in Borneo by 
Mr. Thomas Lobb. The first aspect of this plant is quite 
that of a Sertularia , especially of the well known Sertularia 
Pluma . A more close inspection will show it to be a true 
Trichomanes , with the ramification so fine that when mag- 
nified it resembles the branches of some confervoid marine 
Alga, particularly the Grenus Ceramium i the branches are 
minutely reticulated and here and there beset with short 
bristles or rigid hairs : the pinnae or segments (for it is difficult 
to say whether this ramification should be called pinnate or 
pinnatifid) do not spread in two opposite directions (distichous), 
but stand out as it were, on all sides so as to form a 
thickened mass, in that respect also resembling the Sertularia 
in question and certain Ceramia . The involucres are par- 
ticularly small for the size of the plant, and the columella or 
receptacle is unusually long and stout. 
Fig. 1. Portion of a fertile branch, f. 2. Involucre and 
receptacle : — magnified. 
