An introduction to the study of cryptogamous plants. In letters / By Kurt Sprengel ... Translated from the German.

Sprengel, Kurt Polycarp Joachim, 1766-1833.

Date:: 1807

Credit: An introduction to the study of cryptogamous plants. In letters / By Kurt Sprengel ... Translated from the German. Source: Wellcome Collection.

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$loured, unmarginated expansions of the in- terior substance of the frond, which are furnished below only with cortical substance, and above with a thin layer of seeds (Us- nea, fig. 83.). 5. Piliclia, or ceplialodia—open, round- ish reservoirs, which are either pedicled or sessile, but always strongly coloured, and lined with a layer of seeds, frequently falling off in the form of powder. (Calicium, fig. 83. b. ; Basomyces, fig. 93 ; Stereocaulon, fig. 89. a. b.; Isidium, fig. 97. b. The two farmer have generally pedicled, the two latter sessile, pilidia). 6. Tricce—closed, elongated, twisted re- servoirs, formed of a proper substance, of a black colour, bearing their seeds on the in- terior side, beneath a proper membrane (Gyrophora, fig. 94. b.). 7. Lirellce—closed, elongated, straight, or somewhat curved reservoirs, formed of a proper, black, spongy mass (Opegrapha, fig. 102. a. b.). 8. Thalamia—closed, round reservoirs \Vithin the substance ojf the frond itself, sur- 2 b rounded$