it: 1
T A B . C X C I I .
B L E C H N UM TR I LOB UM.
F I L I C E S .— G y r a t æ . B r . P o l y b o d i a c e æ . K a u l f . F i l i c e s v e ræ . W i l ld ., S p r e n g .
Gen. Char. B L E C H N U M , Linn. «S’ori lineares, continui, gemini, utrinque ad costam. Indusia
membranacea, plana, versus costam dehiscentia.
B lechnum trilobuin; frondibus lanceolatis pinnatis, pinnis alternis denticulatis apice mucronulatis,
basi utrinque acute lobatis, sterilibus oblongis, fertilibus-linearibus, soris marginalibus demum
confluentibus.
Blechnum trilobuin. P r e s l, in R e liq . H a n k . p . 50. / . 2.
Lomaria mucronata. Gillies, M S S .
Hab . In Pcruvia. Hænke. In montibus Cordova?, America? Meridionalis. J . Gillies, M .D .
Caudex longus, crassus, ater, nostris examplaribus lon ge descendens, superne radicosus, et hispido-squamosus.
S tip ite s cæspitosi, breves, pallide fusci, nitidi, niembranaceo-squamosi.
Frondes erectæ, lanceolatoe, spitliainoeæ, etiam pedales, præcipue fertiles, pinnatæ. P in n æ alternæ, liorizontaliter
patentes, rigidoe, subserratæ, pubescenti-glandulosoe, apice mucronatoe, basi truncatæ e t utrinque lobo acuto;
stériles oblongoe, arete dispositæ, vù-ides; fe r tile s magis remotæ, lineares, fuscescentes.
Soi-i prope marginem siti continui, fere ad apicem, sed non ad basin, attingentes.
Capsulæ globosoe, sublonge pedicellatoe.
■Scj/iîwa subreniformia, pellucida, flavescentia.
Fig . 1. Pinna sterilis. f. 2. Portio pinnæ fertilis. f. 3. Capsuloe. f .4 . Semina, f. 5. P ili glandulosi :—magn. auct.
The fertile frond o f this species is well figured and described by Presl in the ReliquicE Hcmkeamz:
and th a t plant, lik e ours, has th e sori n o t extending to the two lobes at th e base o f the leaf. In this
respect, and almost only in this respect, our Fern differs from one found in Juan Fernandez by
Mr. D . D ou glas and Dr. Scouler, in which the sori are continued round th e margin o f the lobes.
The sori in the present species and in th e Juan Fernandez plant are so near to the margin as to
claim as great affinity with L om a ria as with Blech n um ; and the plant is probably n o t far removed
from L om a ria chilensis o f Kaulfuss.