TAB. CXCII. 
BLECHNUM TRILOBUM. 
FILICES.—GrnArz. Br. PorvropiacEm. Kaulf. Firiczs verw. Willd., Spreng. 
GzN. Cuan. BLECHNUM, Linn. | Sori lineares, continui, gemini, utrinque ad costam. 4Zndusia 
membranacea, plana, versus costam dehiscentia. 
Brrcuwuw trilobum ; frondibus lanceolatis pinnatis, pinnis alternis denticulatis apice mucronulatis, 
basi utrinque acute lobatis, sterilibus oblongis, fertilibus linearibus, soris marginalibus demum 
confluentibus. 
Blechnum trilobum. — Presl, in Eelig. Hank. p. 50. f. 2. 
Lomaria mucronata. Gifies, MSS. 
Has. In Peruvia. ZZenke. In montibus Cordove, Ámerice Meridionalis. J. Gillies, M.D. 
Caudex longus, crassus, ater, nostris examplaribus longe descendens, superne radicosus, et hispido-squamosus. 
Stipites czespitosi, breves, pallide fusci, nitidi, membranaceo-squamosi. | 
rondes erectae, lanceolatze, spithamzez, etiam pedales, praecipue fertiles, pinnate. —Pinne alterne, horizontaliter 
patentes, rigidse, subserratze, pubescenti-glandulosz, apice mucronatee, basi truncatze et utrinque lobo acuto; 
: steriles oblongse, arcte dispositse, virides; Jertiles magis remotze, lineares, fuscescentes. 
Sori prope marginem siti continui, fere ad apicem, sed non ad basin, attingentes. 
Capsule globosse, sublonge pedicellatae. 
Semina subreniformia, pellucida, flavescentia. 
Fig.l. Pinnasterilis. f.2. Portio pinne fertilis. f.3. Capsulee. f.4. Semina. f.5. Pili glandulosi :—tmnagn. auct. 
The fertile frond of this species is well figured and described by Presl in the Zieliquie Henkeana : 
and that plant, like ours, has the sori not extending to the two lobes at the base of the leaf. In this 
respect, and almost only in this respect, our Fern differs from one found in Juan Fernandez by 
Mr. D. Douglas and Dr. Scouler, in which the sori are continued round the margin of the lobes. 
The sori in the present species and in the Juan Fernandez plant are so near to the margin as to 
claim as great affinity with Lomaria as with Blechnum ; and the plant is probably not far removed 
from Lomaria chilensis of Kaulfuss. 
