dcsimg

Comprehensive Description

provided by North American Flora
Marchantia chenopoda L. Sp. PI. 1137. 1753
Marchantia androgyna L. Sp. PI. 1138, in part. 1753.
Chlamidium indicutn Corda, in Opiz, Beitr. 647. 1829.
Marchantia Swartzii Lehm. & Lindenb.; Lehm. Stirp. Pug. 4: 9. 1832.
Marchantia cartilaginea I^hm. & Lindenb.; Lehm. Stirp. Pug. 4: 31. 1832.
Marchantia brasiliensis Lehm. & Lindenb.; Lehm. Stirp. Pug. 4: 32. 1832.
Grimaldia peruviana Nees & Mont.; Mont. Fl, Boliv. 53. 1839.
Marchantia peruviana Nees; G. L. N. Syn. Hep. 538. 1847.
? Marchantia Notarisii Lehm. Stirp. Pug. 10: 22. 1857.
Marchantia Dillenii Lindb. Krit. Gransk. Hist. Muse. 47. 1883.
Preissia mexicana Stephani, Hedwigia 22: 49. 1883.
Marchantia chenopoda cartilaginea SchifFn. Nova Acta Acad. Leop. -Carol. 60: 288. 1893.
Cyathophora mexicana Underw. Bot. Gaz. 20: 68. 1895.
Thallus pale-green or yellowish-green, sometimes more or less glaucous and usually purplish below, mostly 2-3 cm. long and 0.4-0.7 cm. wide, the texture varying from firm and leathery to delicate; epidermis composed of cells with slightly thickened walls, locally in two layers, sometimes containing slime-cells, averaging about 40 X 22 fi; surface-papillae lacking; pores usually bounded by 7 circles of cells with 4 (or often more) cells in each circle, those of the innermost circle 4-6, enclosing a broad opening with straight or somewhat concave sides; ventral tissue with sclerotic cells and usually with slime-cells; ventral scales in 4 rows; appendages of median scales very variable, lanceolate to broadly ovate, mostly 0.45-0.65 mm. and 0.3-0.4 mm. wide, acuminate, acute, or apiculate at the apex, entire or irregularly and sparingly toothed on the margin. Male receptacle borne on a stalk 1-2 cm. long, with 2 rhizoid-furrows, destitute of green tissue, mostly 0.8-1 cm. broad, deeply lobed, the lobes mostly 4, rarely 5 or 6, palmately spreading; female receptacle borne on a stalk 2-4 cm. high, with 2 rhizoid-furrows and 2 narrow bands of green tissue, mostly 6-8 mm. broad, shortly 5-rayed, the rays palmately disposed, convex, rounded, without papillae; involucre firm,, sparingly dentate, to closely ciliate or laciniate, the teeth 1-5 cells long; spore brownishyellow, about 26 fl in diameter, tetrahedral, with narrow wings and low surface-ridges; elaters about 6 M wide. Cupules closely short-ciliate, destitute of papillae.
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bibliographic citation
Caroline Coventry Haynes, Marshall Avery Howe, Marshall Avery Howe, Alexander William Evans. 1923. SPHAEROCARPALES - MARCHANTIALES; SPHAEROCARPACEAE, RIELLACEAE; RICCIACEAE, CORSINIACEAE, TARGIONIACEAE, SAUTERIACEAE, REBOULIACEAE, MARCHANTIACEAE. North American flora. vol 14(1) New York Botanical Garden, New York, NY
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