40. I. H y s t e ix Bory, Comqites Eeiid. Acad. Juno, 1844 ; A. Br.
Exqil. So. Alg. t. 8 6 , fig. 1. 1. Delaiandei Lloyd. I . sicula Todaro.
1. Duricci Hook. Brit. Ferns, t. 6 6 , non Bory. Cephaloceraton
lly s tr ix Gennari. — Eootstock and leaves exactly as in I . Duricci,
but the old leaf-bases iu tlie tyqie furnished with hard sqiines i - i - in.
loug. Macrospores finely granulose. Microspores echinirlato. "
Hab. Guernsey and N.E. France to Spain and Asia Minor. Var. subin-
ermis Durieu {I Uystrix, forma desquamata, A. Br. ; CejPialoceratoii gymiw-
airpum Gennari), differs by having only short points to the leaf-bases, like those
of I. Duricci.
Order V.—EHIZOCAEPFÆ.
^lacrosporcmyiu containing a single maorospore, from which a
rudimentai'3’ qirothalhis is qiroduced. hlicrasporanyia ooiitainiug
numerous microsqiores. Macrosporangia and microsporaugia contained
in the same or different membranous conceptcicles, which are
single, without any outer covering, or several together contained in
a dehiscent coriaceous outer oonceqitacle.—Habit very various.
The StiU'inicur, are fugacious lioatiug annuals; the 2[aysilieæ perenn
ials, growing in damp soil, with a filiform rootstock.
Suborder 1.— S a l v in i e æ .
Conceptacles usually single, always membranous and indéhiscent,
and containing sporaugia of only one kind.
1. S a l v in ia (2Iiüheli) Schreb.
Conceptacles globose, membranous, indéhiscent, monoioous,
seated in clusters ou short branches of the floating stem, 1 -2 of
each cluster containing ten or more turbinate macrosporangia,
each of which contains a single macrospore ; several of each
cluster containing very numerous globose microsporangia, which
are much smaller than the macrosporangia, aud each contains
iiuuierous minute microspores.— Fugacious annuals, with slender
floating stems, giving off' shortly-petioled or sessile fronds on the
upper side aud the short branches, that bear the coiioeptaoles and
miich-brauohed feathered root-fibres downwards. Fronds small,
simple, with a distinct midrib that runs from the base to the apex,
and close erecto-patent secondary veinlets coniieoted by a few
arches. Sporanc/ia of both kinds borne on a much-branched
filamentous receptacle.
Fronds fiat, floating, horizontal.
Fronds about three times as long as broad
Fronds ovate-obloag, or oblong, or oblong-
orbicular . . . . . .
Fronds o r b i c u l a r ........................................................
Fronds suberect, with edges folded together .
Imperfectly known species . . . . .
Sp. 1.
Sp. 2 -7 .
Sp. 8 -9 .
Sp. 1 0 -1 1 .
Sp. 1 2 -1 3 .
1. S. OBLONGiFOLiA Mart. Ic. Cryqi. Bras. 128, t. 75, fig. 2, and
t. 76. — Fronds laxly placed, subsessile, horizontal, oblong, emar-
giiiate, cordate at the base, l | - 2 in. long, 4 in. broad, the very
numerous veinlets as close as in S. liadula, the uqiper surface with
firm paqiillai with bristly tips, the lower side finely pubescent.
Conceptacles 1 0 -2 0 together in peduncled clusters, the cells of
their walls regularly hexagonal.
Hab. Amazon Valley and Central Brazil, Martius, Pohl, St. IHlaire.
2. S. NATANS Hoffm. Germ. ii. 1; Schk. Cryqit. t. 1 7 3 ; Corda
Ehizos. t. 2, figs. 1 -1 1 . S. verticillata Eoxb. in Calo. Journ. 1845,
t. 1 8 -2 0 ; Griff. Ic. t. 1 2 3 -1 2 8 . S. vulgaris Euqir. S. europcca
Desv. S. Sprenyelii Corda Ehizos. 10, t. 2, figs. 1 2 -2 3 . 21arsilea
natans Linn. — Fronds oblong, horizontal, rounded or slightly
cordate at the base, 4 in. long, bright green on the upper surface,
with about 20 erecto-qiatent veinlets on each side of the midrib,
each beset with 6 -8 tufts of minute bristles, the under side thinly
matted like the stem with shining brown pellucid hairs. Gou-
ceqitaoles 4 -8 iu a cluster, the cells of their walls regularly
hexagonal.
Hab. Warm temiierate regions of the northern hemisphere of the Old
World, extending from the South of France to North China and the Plains of
India.
3. S. NiGROPDNCTATA A. Bi’. Ill Kuliu, F il. Afric. 201. — Habit
entirely of 8 . natans. Fronds oblong, shortly petioled, f - 4 in. long,
rounded or slightly cordate at the base, with 1 5 -2 0 pairs of erecto-
patent veinlets on each side of the midrib^ marked with a row of
spaced-out blackish dots, without distinct bristly points, the under
surface thinly coated with adpressed brown hairs. Fruit unknown.
Hab. Niger Country, gathered by Vogel and Barter. Old Calabar, Mann !
4. S. H il d b b e a n d t i i Baker.— Fronds horizontal, sessile, oblong,
4 - 4 in. long, 4 - J in. broad, obtuse, or obscurely emargiiiate, cordate
at the base, flat, distinctly keeled, green and rough with minute
concolorous stiff hairs all over the upper surface, brown with
matted fibres beneath. Fruit iinlmowii.
Hab. North Madagascar, Hildehranclt 3413 !
5. S. MOLLIS Mett. in Kuhn F il. Afric. 2 31.—Fronds horizontal,
oblong, shortly petioled, 8 -9 lines long, about 4 hi. broad, truncate
at the base, very obtuse at the aqiex, suhlobed, densely clothed with
short hairs, sparingly with a few longer ones beneath, the close
veins anastomosing in several rows of areolie between the midrib
and edge. Fruit unknown.
Hab. Madagascar, Tliouars.
6 . S. HASTATA Desv. in Ann. Linn. Soc. Par. vi. 177. — Fronds
laxly disposed, thin, spreading, flat, shortly petioled, ovate-oblong,
about f in. long, f - 4 in. broad, slightly cordate at the base, deeqily
emargiiiate at the aqiex, clothed with dense short grey pubescence
all over the upper surface, thinly matted with brownish tomentum
b en e a th ; veins very numerous, fine, immersed, erecto-patent.
Conceptacles not seen.
Hab. Eastern Madagascar, Baron 1569 ! Humblot 330 !