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Dicranella longirostris Mitten 1869

Comprehensive Description

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Dicranella longirostris (Schwaegr.) Mitt. Jour. Linn.
Soc. 12 : 30. 1869.
Trematodon longirostris Schwaegr. Suppl. I 2 : 343. 1816. Coscinodon longirostris.ftrid. Muse. Recent. Suppl. 4: 51. 1819. Weisia longirostris Schwaegr. Suppl. 2 1 : 54. 1823.
Seligeria longirostris C. Mull. Syn. 1: 421. 1848. -
Microdus longirostris Schimp.; Besch. M6m. Soc. Sci. Nat. Cherbourg 16: 162. 1872. rMicrodus crispulus Besch. Ann. Sci. Nat. VI. 3: 179. 1876. Dicranella pseudolongirostris Card. Rev. Bryol. 36: 68. 1909.
Plants in low, rather compact, brownish-green mats; stems mostly simple and less than 1 cm. high, with leaves more or less erect and appressed or somewhat curved : stem-leaves shortlanceolate, mostly a little more than 1 mm. long, with stout nearly percurrent costa about 70 m wide below, and leaf-blade three or four cells wide on either side of the costa to the entire, narrowly obtuse apex; leaf-cells rectangular with walls somewhat thickened throughout, .the basal ones narrow, about 8 p wide and 50 p long, the upper one and a half times to twiceas long as wide ; perichaetial leaves erect, scarcely clasping, up to 2.5 mm. long, from an ovate base gradually narrowed to a rather broad, grooved limb not much longer than the basal part, with recurved margins and an entire or scarcely crenate apex: seta erect, yellowish, 7 mm. long: capsule oval, symmetric, erect, 1.25 mm. long, when dry and empty dark and somewhat ribbed, the exothecal cells, with thickened walls, up to 50 p long and 8-10 p wide; annulus large; lid obliquely longrostrate; peristome-teeth" mostly less than 120 p high, papillose, not striate, irregularly divided 92 about one half down or sometimes not divided or only perforate along the median line: spores up to 18 /i in diameter, very coarsely papillose.
Type locality: Guadeloupe.
Distribution: St. John; Dominica; Guadeloupe; Martinique; Barbados; Mexico.
bibliographic citation
Robert Statham Williams. 1913. (BRYALES); DICRANACEAE, LEUCOBRYACEAE. North American flora. vol 15(2). New York Botanical Garden, New York, NY
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