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EXPLANATION OF THE PLATES. 
PLATE THE NINETEENTH. 
Filices and Lycopodiacece. 
Fig. 1. Lycopodium. Lycopodiacece . Part of a branch 
magnified ; leaves oblong, linear, much compressed, two- 
rowed ; stipules single, lanceolate, one-sided, tiledlike. 
a. Capsular conceptacles, with bractese. 
1. Another kind of capsular conceptacles, with bracteae. 
Fig. 2. The second kind of conceptacle, much magnified ; 
three-lobed, two-valved, three-seeded. 
Fig. S. A seminule taken out of these conceptacles, and 
much magnified. 
Fig. 4. The same opened. 
a. The lorica. 
1j. The kernel. 
Fig. 5. The first kind of conceptacles much magnified ; 
kidneyshape, two-valved, many- seeded. 
a. The seminules. 
1. The same, very much magnified, to show they are 
angular. 
Fig. 6. Bernhardia dichotoma. Lycopodiacece. A capsu- 
lar conceptacle magnified, three-lobed, three-valved, par- 
titions median. 
Fig. 7. A branch of the same plant magnified. 
a. Capsular conceptacles, with two bractese. 
Fig. 8. a. Seminules magnified. 
1. The same, very much magnified, to show they are 
angular. 
Fig. 9. Tmesepteris Tannensis. Lycopodiacece. Concep- 
tacle magnified, capsular, opening, 2-valved, 2-celled ; with 
one of the two leaves between which it was placed. 
Fig. 10. Lycopodium umbrosum. Lycopodiacece . Con- 
ceptacle magnified, capsular, kidneyshape, 2-valved, many- 
seeded. 
a. Seminules. 
Fig. 11. The same very much magnified to show that 
they are angular, and collected together by threes or fours 
into globules. 
Fig. 12. Equisetum palustre. Fquisetacece. Spike mag- 
nified, with the terminal ament. 
a. Involucra. 
b. Conceptacles attached to the under side of the invo- 
lucra. 
Fig. 13. A seed? of the same much magnified, with the 
hygrometrical threads. 
