Series II. IIE T E B O S PO H IA . — Sqiores of two different kinds,
macrospores and microspores, both developing rudimentary
prothalha, which remain attached to the spore, those of the
macropores bearing archegonia and those of the microspores
bearing antlieridia containing antlierozoids.
Order IV. SELAGINELLAOEÆ. — Sporangia not enclosed
111 aii^ exterior covering, placed singly in the axils of ordinary or
modihed leaves.
1 . S e l a g in e l l a .— Terrestrial and caulescent. Sporangia de-
inseent free, collected in spikes of which the bracts are usually
different from the proper leaves in shape aud texture. Macrospores
few in each maorosporangium. Page 8 1 .
2. IsoETE^s.— Aquatic or subterrestrial,“acaulescent. Sporangia
not aiTangod in spikes but imbedded in the base of the long
subulate leaves of a dense rosette. Macrospores very numerous
111 each niacrosporaugium. Page 123.
Order V. EHIZOCAEPEÆ. — Sqiorangia enclosed in one or
two exterior coverings (coiioeptaoles).
Suborder I. S a l v in i e æ . — Conceptacles membranous, h i d e -
iiiscent, containing only one kind of sporange.
1. S a l v in ia . Leaves entire, with oomqilicated anastomosing
venation. Microsporangia free inside the oonoeptaole. Page 184.
2 . A z o l l a . - -L e a v e s small, bifid, simply veined, clasping a
produced stem. Maorosporaiigia aggregated inside the conceptacle
m massulæ with a membranous cuticle. Page 137.
Suborder II. M a r s i l i e æ . — Coiioeptaoles always double, the
outer sac coriaceous and dehiscent, the inner membranous, iii-
(teiiisoeut, coutamiiig sporangia of both kinds.
3 . M a r s il e a . — Conceptacles niauy-celled, deliiscino- b v the
Lafiets ^*P?g! of " PekoD aud 4 digitate cuueate
4. P il u l a r ia .— Conceptacles 2-4-oelled, dehiscing at the tip by
P a ï l 4 ? * '®
I N D E X .
{ V a e i e t i e s a n d B y n o n y m s i n I t a l i c s . )
A z o l l a
africana, 138
Arbuscula, 137
honariemis, 138
caroliniana, 138
decomposita, 138
densa, 138
filiculoides, 137
guineensis, 138
japonica, 138
magellanica, 137
mexicana, 138
microphylla, 138
nilotica, 138
pinnata, 138
portoricensis, 138
rubra, 137
Bernhardia
antillarum, 30
califomica, 30
capensis, 30
complanata, 30
Deppeana, 30
dichotoma, 30
floridana, 30
indica, 30
mariana, 30
mascarenica, 30
novcB-hollandice, 30
oahuensis, 30
ramulosa, 30
Schiedeana, 30
Zollingeri, 30
Cephaloceraton
Hystrix, 134
E q u i s e t u m
altissimum, 5
arenarium, 6
arvense, 2
arvensi-limosum, 3
asperrimum, 5
bicarinatum, 3
bogotense, 3
E q u i s e t u m
campanulatum, 4
campestre, 2
caracasanum, 4
chilense, 3
debile, 5
diffusum, 3
Drummondii, 2
eburneum, 2
elongatum, 4
ephedroides, 4
flagelliferum, 3
fluviatile, 2, 4
giganteum, 4
giganteum, 4
Heleocharis, 4
Humboldtii, 4
hyemale, 5
incanum, 4
inundatum, 3
Kochianum, 3
loeve, 3
lævigatum, 5
laxum, 5
Lechleri, 4
limosum, 4
littorale, 3
Mackaii, 6
Martii, 4
maximum, 2
mexicanum, 4
Moorei, 5
multiforme, 6
niyriochoetum, 4
paleaceum, 5
pallens, 5
pallidum, 4
palustre, 3
pamwnicum, 4, 5
piroealtum, 6
pratense, 2
pyramidale, 4
quítense, 3
E q u i s e t u m
ramosissimum,
ramosissinmm, 4
ramosum, 4
reptans, 6
robustum, 6
scandens, 4
Schaffneri, 4
Schleichleri, 5
scirpoides, 6
scoparium, 3
Sieboldi, 5
silvatioum, 2
stiqmlaceum, 3
Telmateia, 2
Timorianum, 5
brachyodon, 6
umbrosum, 2
variegatum, 6
verticillatum, 5
virgatmn, 5
Wilsoni, 6
xylochætum, 4
zonatum, 5
ISOETES
adspersa, 129
æquinoctialis, 131
alpina, 127
amazónica, 133
ambigua, 125
andina, 124
atrovirens, 125
azorica, 125
bostica, 132
Bolanderi, 126
Boottii, 125
Boryana, 130
brachyglossa, 131
Braunii, 125
Butleri, 128
califomica, 126
capsularis, 132
Ghapmanni, 129