摘要:

Summary.1D. filiformis has a creeping basal thallus by which it adheres to the substratum.2The creeping thallus is perennial and, wheii epiphytic (parasitic ?), is attachedt u its liost by plugs of h u t>wlricli cause marked disintegration of the cells of the host.3The ordinary filiform thallus owes its origin to the inter‐calary transverse septation of the articulations of certain branches of the creeping thallus. The group of active filainerita may be endogenous or exogenous, and the order in which the rows of cells become specialized is generally centrifugal, i. e. certain f i b ments begin to divide in an intercalary manner aiid the adjoiuing filaments follow suit, the most recently divided being most periphera

ISSN:0368-2927    

DOI:10.1111/j.1095-8339.1895.tb02418.x

出版商:Blackwell Publishing Ltd    

年代:1895

数据来源: WILEY

摘要:

Summary.Typical mucilage‐canals occur in the Marattiacese,i. e.schizo‐genous intercellular spaces with a livingsecretoryepitheliuin. This was actually demonstrated in the fronds ofA. evecta, Marattia alataandM. cicutcefolia. They are in every essential feature similar in mode of origin and development to the well‐known resin‐canals ofHedera, Pinus,&, and arenotproduced by the mucilaginous degradation and death of cells.No mucilage‐canals were found in the roots ofA. evectaandA. evectavar.Jiypoleuca?, but rows of tannin‐sacs which simulated canals.In the aerial roots ofA. evecta, var.pruinosaand var.Teys‐maniana, a ring of peculiar mucilage‐cavities was found in the cortex; these cavities have no secretory epithelium, and seem to have a schizo‐lysigenous mode of origin.True mucilage‐canals were found in the roots ofMarattia attenuata, in which the only variation from the commoner mode of development was the want of definiteness in the earliest stages of the initial group and the very frequent irregularity in the deve

ISSN:0368-2927    

DOI:10.1111/j.1095-8339.1895.tb02419.x

出版商:Blackwell Publishing Ltd    

年代:1895

数据来源: WILEY

ISSN:0368-2927    

DOI:10.1111/j.1095-8339.1895.tb02420.x

出版商:Blackwell Publishing Ltd    

年代:1895

数据来源: WILEY

ISSN:0368-2927    

DOI:10.1111/j.1095-8339.1895.tb02421.x

出版商:Blackwell Publishing Ltd    

年代:1895

数据来源: WILEY

ISSN:0368-2927    

DOI:10.1111/j.1095-8339.1895.tb02421a.x

出版商:Blackwell Publishing Ltd    

年代:1895

数据来源: WILEY