PuiaTeE 1613. 
HYMENOPHYLLUM TRIANGULARE, Baker. 
Fitices, Suborder HymEnopuyLuea. 
Hymenophyllum (Leptiocionium) triangulare, Baker in Hook. et 
Baker, Syn. Fil. p. 69; rhizomate filiformi longe repente, stipitibus 
elongatis filiformibus nudis, frondibus ovato-oblongis tripinnatifidis 
glabris, rachi primaria supra basin alata, pinnis ascendentibus basi 
postice cuneato-truncatis infirais maximis deltoideis, pinnulis inequi- 
lateraliter rhomboideis, segmentis tertiariis linearibus uninervatis argute 
serratis, soris paucis basi immersis, indusii valvis ovatis obtusis sub- 
ris. 
H. Mannianum, Mett.; Kuhn, Fil. Afric. p. 40. 
Has. Mountains of Fernando Po, alt. 3,000 ft., Mann, 333. 
Stipites 2-3-pollicares. Lamina 4-6 poll. longa, basi 2-2} poll. lata. 
Segmenta ultima 14-2 lin. lon 
- a. 
Discovered by Gustav Mann in 1860. It is allied most nearly to 
the New Zealand and Polynesian H. multifidum and H. bivalve— 
J. G. Baker. 
Fig. 1. Whole plant, life size. 2. Pinnule. 3. Portion of pinnule. 4. Indusium. 
5, 6. Sporangia. More or less enlarged. 
