Contributions to the bryology and hepaticology of North America / by William S. Sullivant.

  • Sullivant, William Starling, 1803-1873.
Date:
1846
Catalogue details

Licence: Public Domain Mark

Credit: Contributions to the bryology and hepaticology of North America / by William S. Sullivant. Source: Wellcome Collection.

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    terminales. Folia perigonialia 2, basi ventricoso-vaginantia, parte superiore conduplicatur® eroso-truncata, cseterum caulinis similia; antheridia 3-4, filamento brevissimo suffidta, paraphysibus nullis: perichaetialia 2, caulinis superioribus conformia sed longiora. Cap- sula erecta, symmetrica, ovalis, inferne attenuata, siccitate sub ore dilatato constricta: pedicellus 1 lineam longus, e basi geniculata flexuoso-ascendens, siccus sinistrorsum tortus: peristomii dentes erecto-incurvati, rubelli, apice ultra medium fissi, dense articulati, cruribus inaequalibus subulatis granuloso-scabris : operculum conico- rostratum; rostro recto, aut vix curvato, dimidiam capsulae partem longitudine sequante: calyptra solum operculum obtegens, conico- subulata, uno latere profunde fissa: sporae majusculae diametro aequantes dentis basi dimidiam latitudinem. This species grows on stones in the bed of desiccated rivulets, in shaded places, near Columbus, Ohio; it fruits in July and August. Besides other marks of less importance, the dioecity of this moss readily distinguishes it from F. incurvus, Br. Sch., small forms of which it much resembles. The character in the foregoing de- scription, drawn from the relative length of the diameter of a spore and the breadth of a tooth of the peristome near the base, may be made available in many cases for distinguishing species. In the present species and its nearest ally, F. incurvus, this char- acter is efficient, since in the latter a spore equals one third the breadth of the peristomal tooth. In the F. obtusifolius, Wils., the spores are unusually large, one being more than sufficient to cover the breadth of a tooth. Tab. II. A.—Fig. 1. Plants of the natural size. Figs. 2, 4. Capsules. Fig. 3. Calyptra. Fig. 5. Female plant. Fig. 6. Male plant. Fig. 7. An- theridia. Fig. 8. A leaf. Figs. 9. 10. Portions of a leaf. Fig. 11. Por- tion of the peristome. Fig. 12. Spores. All except Fig. 1 more or less magnified.