‘eGR 
the remaining species to France. In the minor distribution 
France leads with 
I. lacustris L. (1) I. Malinverniana Ces. & DeNot. (3) 
I, echinospora Dur. ( 1) I. velata A. Br. (3) 
I. Azorica Dur. (1) I. dubia Gennari. (3) 
I. setacea Bosc. (3) I. Tegulensis Gennari. (3) 
L tenuissima Boreau. (3) I. hystrix Bory. (4) 
I. Boryana Dur. (3) I. Durizxi Bory. (4) 
_ Ladspersa A. Br. (3) 
‘mountain regions of central Europe; both, moreover, ate — 
go BOTANICAL GAZETTE. [ April, 
phibie ” including Engelmann’s ‘ terrestrial ”’ species, while 
his group ‘‘ Terrestres”’ is limited to two European species _ 
nine species; with two of Dr. Engelmann’s species over- 
looked by him and the two species described below the num- 
_ Geographically Isoetes has a peculiarly wide distribution; — 
to illustrate its main features we will take the various regions — 
of the world in order, commencing with Europe, where the — 
genus was first known: ; 
I. Eurorr,—The European species are thirteen in num- : 
ber, only excelled by our own continent. The species are 
as follows 3 
_ OF the above, two species alone, I. lacustris and I. echi- 
| nine species, the island of Sardinia hati. 
ve, while England and Sweden have only two each.* _ 
7: 
ported 
deriana Dur. & Let, (3) 
AFRICA.—From Africa ten species have been Te 
: Peral 
4, velata A. Br, (3 
ae r. (3) 
I. Natalen: 
I. Welwitschii A. Br (8) 
Siae a L. Schweinfurthii A. Br. (3) 
L Durie; se “ I. xquinoctialis Welw. (3) 
FL) | L nigritiana A. Br. (3) 
” 
Of these, the oe a the aiee 
alone being pec rst five are found only in’ Algeria, t j 
‘ / F d 
uliar to that country ; the second 1s fou 
37 ve 
‘I = iy following the Species refer to Baker’s groups in the order ange 
ystrix 
Politically of Engle from Guernsey, which is botanically a part of France, Hove” 
