FISSIDENS HYALINUS, Hook, et Wils.
Tab. 21.
Plantæ perpusillæ, tenerrimæ, gregarie vel cæspitulose degentes, glauco-virides.
Caulis 1–2 lineas altus, simplex, erectus vel declinatus, basi radiculis hyalinis copiose instructus.
Folia mollissima, explanata, 3–4-juga, inferiora minima, superiora mnlto majora, lanceolata, oblongo-lanceolata, interrupte anguste marginata, e cellulis amplissimis hyalinis hexagono-areolata, duplicatura ad medium producta; lamina dorsali lata ad basin evanescente; costaomnino deficiente.
Flores dioici: feminei soli noti, terminales, diphylli.
Capsula oblonga, erecta, macrostoma, leptoderma, brevius pedicellata; peristomii dentibus gracilibus rubellis solidis dense articulatis; calyptra cylindraceo-conica operculi rostrum longiusculum solum tegente; sporis minimis.
Fissidens hyalinus, Hook. & Wils. in Lond. Jour. Bot. 1841, p. 89, t. 2; Sulliv. Musc. Alleghan. No. 180; Mosses U. States, p. 24.
Hab. "Moist, rocky ledges, Bank Lick, on Cassidy's farm, near Cincinnati, Ohio." T. G. Lea.
This species, remarkable for the absence of a costa in its leaves, has been found only by the late Thomas G. Lea, who detected it in the year 1839. It has since been carefully searched for in the locality above mentioned, but without success.
TAB. 21.—Fissidens Hyalins.
1. Plantæ naturali magnitudine.
2, 3, 4. Plantæ.
5, 6, 7. Folia
.
8, 9. Areolatio folii.
10. Capsula opcrculata cum calyptra in situ.
11. Pars peristomii cum sporis.
12. Operculum et calyptra.
13, 14. Calyptræ.
15. Operculum.
