FILICES. (FERNS.) . 080 
SERIES II. 
CRYPTOGAMOUS or FLOWERLESS PLANTS. 
VEGETABLES destitute of proper flowers, and producing, 
in the place of seeds, minute homogeneous bodies (spores) 
containing no embryo. 
-Crass IL. ACROGENS. 
Plants with a distinct stem, growing from the apex only, 
.containing woody fibre and vessels. 
Hs 
ORDER 161. EQUISETACEA. | ossa fone 
Comprises valy the genus 
1. EQUISETUM, L. Scovrine Rusu. 
Fructification terminal, spiked or cone-like. Spore-cases (sporangia) 6-7, 
borne on the lower surface of the peltate scales, 1-celled, opening on the inner 
side. Spores loose, furnished at the base with 4 club-sbaped elastic filaments 
(elaters). — Stems leafless, grooved, hollow and jointed, bearing at the closed 
joints a toothed sheath. 
l. E. leevigatum, Braun. Stems perennial, mostly simple, the obtuse 
ridges smooth, or roughened with minute tubercles; sheaths appressed, with 
numerous bristle-like caducous black teeth. — Stiff clay-soil, North Cami 
and northward. — Stem 1j? - 4? high. 
Onpzn 162. FILICES. (Ferns.*) | 
Leafy plants, mostly with perennial rootstocks (caudex), which in this 
climate are creeping and slender, or stouter and sometimes ascending, 
but in the tropies often grow many feet high, with a diameter of several 
inches, giving the plants an arborescent appearance (Tree. Jerns). Leaves 
(fronds) circinately rolled up in vernation (except the last Suborder), 
—À on a stalk or petiole (stipe). 7 aeria one- 
* Pr DANIEL e. Batos. 
