Text-book of botany, morphological and physiological . er root-hair with thickenings projecting inwards, theseare arranged on a spiral constriction of thecell-wall ; at Z) a thicker root-hair, with thickerbranched projections, and spiral arrangementstill more evident. HEP A 307 depression in the thalloid forms, as well as on the termination of the filiform stemin the leaf-bud of the foliose genera. The form of the apical cell, and its segmen-tation in the thallus of Metzgeria, have been represented in detail in Figs. 99 and 100(p. 120) ; in Aneura and Fossombronia it is also wedge-shape
Text-book of botany, morphological and physiological . er root-hair with thickenings projecting inwards, theseare arranged on a spiral constriction of thecell-wall ; at Z) a thicker root-hair, with thickerbranched projections, and spiral arrangementstill more evident. HEP A 307 depression in the thalloid forms, as well as on the termination of the filiform stemin the leaf-bud of the foliose genera. The form of the apical cell, and its segmen-tation in the thallus of Metzgeria, have been represented in detail in Figs. 99 and 100(p. 120) ; in Aneura and Fossombronia it is also wedge-shaped. In Blasia, on the otherhand, Leitgeb states that it is four-sided, and forms four rows of segments, a dorsal, aventral, a right, and a left row. This may be most easily represented by supposing awedge-shaped apical cell forming segments by walls inclined alternately upwards anddownwards (towards the dorsal and ventral surfaces), as well as lateral segments fromwhich the leaves proceed ; a leaf is produced from the dorsal part of a lateral segment,. Fig. 22T. — Female receptacle of poly-morpha seen laterally from below; st stalk with twochannels ; sr the radiate outgrowths of the disc ;pc the intermediate perichxtium ; / sporogonia(X about 6).
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectbotany, bookyear1875
