FLORA VITIENSIS. B85 
prolifera, Hook, et Arn. Bot. Beech, p. 108, Sandwich Islands (Barelay! Macrae! Strickland! See- 
mann! Hildebrand!). 8. D. Mvorei, Hook. Journ. Bot. 1852, p. 55. t. 3 (Cionidium MMoorei, T. Moore, 
Gard, Comp. p, 143), New Caledonia (C. Moore!), 
IV, Dicksonia, L’Hérit. Sert. Angl.p.30. Sporangia apice nervorum imposita, soros globosos 
v. transverso-oblongos marginales formantia, Indusium duplex, externum membranaceum y, co- 
riaceum, cucullatum, e lobulo frondis reflexo, alterum equitans. Nervi laciniarum indivisi farcati v. 
pinnati, ramis liberis.—Filices candice erecto v, repente sapissime arborescente, frondibus pinnatis, 
bipinnatis triplicato-pinnatisque,—Balantium, Kaulf. Enum. Fil. p. 228. Culcila, Presl, Tent. 
Pter. p. 135, Leptopleura, Presi, 1. c. p. 136. Cystodium, J. Sm. in Hook. and Bauer, Gen. Fil. 
t, 96. 
1, D. Brackenridgii, Mett. Ann. des Sc. Nat, 1861, p. 81, in not.; stipitibus rachibusque 
hirsutis; frondibus sterilibus tripinnatis, coriaceis, glabris; pinnis lineari-oblongis; pinnulis ob- 
longo- v. lineari-lanceolatis, acuminatis, pinnatifidis, apice serratis; segmentis oblique oblongis, sub- 
acutis, serratis, rachibus secundariis supra fulyo-tomentosis; frondibus fertilibus minoribus, quadri- 
piinatis, segmentis ultimis contractis, apice subcuspidiformibus, soris pedicellatis,—D. Berteroana, 
Brack. (non Hook.) U.S. Expl. Exped. Filices, p. 277. D, thyrsopteroides, Mett,? 1. c. p, 81.— 
Viti Levu and Ovalau (U, S. Expl. Exped.; Milne!). Also found in Aneitum (M‘Gillivray !). 
2, D.straminea, Labill, Sert. Austr. Cal. p. 7. t. 10; stipitibus glabris semiteretibus; frondi- 
bus supra decompositis, flaccidis, glaberrimis ; pinnis primariis oblongo-lanceolatis acuminatis, secun- 
dariis triangulatis, acuminatis, ineequilateralibus, basi bipmnatis, medio pinnatis, apice pinnatifidis 
vy. grosse serratis; segmentis ovatis subpedicellatis; soris parvis, simubus dentium impositis.—Dick- 
sonia Torreyana, Brack, U. 8. Expl. Exped. Filices, p. 278. t. 38. Sitobolium stramineum, Brack. 
l. ec. p. 273.—Taviuni (Seemann! n, 767; Sir E. Home!, U, 8. Expl. Exped.), Ovalau (M‘Gilli- 
vray !), Vanua Levu (Harvey!). This species has also been found in Aneitum and Eromanga 
(M‘Gillivray ! C, Moore! Milne!), and New Caledonia (M‘Gilliyray !). 
This species is very different from Davallia dubia, R. Brown (Dicksonia dubia, Gand. and Hook.), in 
the form of the pinnz, and especially in the form and extent of the divisions in the segments. A few 
scattered long hairs oceur in some specimens of D. straminca, but these are very different from the pubes- 
cence of D. dubia. The structure of the indusiam makes our species an undoubted Dicksonia, while a care- 
ful examination of R, Brown's specimens, and others from Dr. Von Miiller, satisfy us that his species is 
rather a Davallia. But indeed the distinction between the two genera is very unsatisfactory, for morpho- 
logically the outer valve in Dicksonia is only the lobe of the segment, which is frequently cucullate 
in Microlepia; and the more or less induration of this lobe is scarcely sufficient to establish generic dis- 
tinctions. 
V. Humata, Cavan. Descr. Plant. p. 272. Sporangia in receptaculo terminali et verticali 
v. subterminali et obliquo imposita, soros rotundatos formantia, Indusia suborbicularia v. oblongo- 
reniformia, basi intus adhzrentia.—Filices rhizomate repente, hirsute squamoso; frondibus GAHIZEEIs; 
simplicibus, pinnatifidis, pedato-pinnatifidis v. subternatis, venis simplicibus fureatis v. pinnatis, 
ramis liberis.—Pteroneuron, Fée, Gen, Fil. p. 320, Pachypleuria, Presl, Epim. Bot. p, 98, 
oned below, the following occur in tropical Polynesia:—1. H. pectinata, J. 
he species ment ot 
ESeUSE Nae epee Mem, Acad, Turin, vol. v. p. 415), from Tahiti 
i k. J _ 1842, p. 425 (Davallia pectinata, Sm. 
Bai sas Solander! D. Nelson !U. S. Expl. Exped.). 2. Al pusilla (Davallia pusilla, Mett. Ann. Se. 
; Sees : CCL ivpe 2 igida, Carr. ms. 
_ 1861, p. 79), from New Caledonia (Vieillard) and Aneitum (M Gillivray ), 3. #. rigida, 
in Herb, Mv Beit (Lrichomanes rigidum, Sol, ms. in Herb.), from Ulaietea (Banks and Solincer’). A. 
H, multifida, Carr. ms. in Herb. Mus. Brit., from Aneitum (M‘Gillivray!), 5, HZ. emula, Carr., Davallia 
enula, Mett. Linnea, 1869, p. 144, from Aneitum (M‘Guilliyray ! n. 64). 
1. H. heterophylla, Carr. in Herb. Mus. Brit.; rhizomate ample repente, squamoso; fron- 
. 2x2 
