Descriptions of the Species. 
2 55 
Banks of Tugela River, Natal (Gerrard and M‘Ken, 237). A 
near ally of S. integerrima.” 
173. Selaginella Cooperi. Baker. 
(Description from Baker’s Fern Allies, page 68.) 
“ Stems intermatted, trailing, filiform, two to three inches long, 
flat on the back, bisulcate on the face, the few erecto-patent 
branches sparingly compound. Leaves of the lower plane 
contiguous and ascending on the branches, rather spaced and 
spreading on the main stem, oblong, acute, one-twelfth inch long, 
membranous, rather unequal sided, cordate, and strongly ciliated 
and imbricated over the stem on the upper side at the base ; leaves 
of the upper side half as long, ovate, with a short cusp. Spikes 
quarter-inch long, square, one line diameter ; bracts ovate-lanceo- 
late, membranous, strongly keeled in the upper half. 
S. Cooperi. Baker, in Journ. Bot. 1884, 89. 
Orange Free State (Cooper, 1056). Between albo-nitens and 
integerrima.” 
Genus XLII. — Isoetes. Linn. 
Small rush-like plants, having a small bulbous crown from 
which rise numerous narrow linear pointed leaves, one to four 
inches long, containing four air tubes, and with frequent transverse 
partitions. The leaves widen and thicken at the base, and in 
their axils somewhat sunk into the base of the leaf, and often 
partly covered by its epidermis, is to be Tound the single sporan- 
gium. Sporangia one-celled, those in the axils of the outer leaves 
containing a few large reproductive spores, those in the axil of the 
inner leaves the numerous minute microspores. 
The genus has no outward resemblance to Selaginella, nor to 
any other related genus. The numerous species grow in damp 
ground, or among water, and are distributed over America, 
Europe, Africa, Australia, and New Zealand. 
