The resulting conchospore germinates to form a tiny prothallus with rhizoids, which develops to a cm-scale leafy thallus.
12.
This eventually results in the formation of a notch at the anterior edge of the prothallus, giving it a roughly heart-shaped appearance ( cordate ).
13.
In contrast to the typical heart-shaped fern prothallus, " T . boschianum " gametophytes are filamentous and resemble colonies of green algae or moss protonemata.
14.
The gametophyte of " L . obscurum " is disc shaped prothallus, measuring an average of 1.5 cm ( 0.6 inches ) in diameter.
15.
It has short, inflated looking elongate 1-2 mm and . 3-. 1 mm wide lobes that have an abrupt margin at the edge, and no prothallus.
16.
The prothallus and apothecia are black, while the thallus areoles are brown . " Atro " is from Latin for " black " and " brunnea " for " brown ".
17.
In common with all ferns, " T . boschianum " exhibits a gametophyte stage in its life cycle ( alternation of generations ) and develops a haploid reproductive prothallus as an independent plant.
18.
In common with all ferns, " H . tunbrigense " exhibits a gametophyte stage in its life cycle ( alternation of generations ) and develops a haploid reproductive prothallus as an independent plant.
19.
Distinguished for his original work on'Lycopodium, Tmesipteris, Phylloglossum'and the Hymenphyllaceae ( Trans NZ Institute : Annals of Botany ); the first to give a complete account of the prothallus and embryogeny of'Tmesipteris '.
20.
(2 ) Synthesising 13 F1 hybrids in 4 fern genera ( an achievement in itself judged against the chances of self-fertilisation in a fern prothallus bearing both antheridia and archegonia ) and which do not lend themselves to emasculation and, therefore, ensure self-fertilisation ) and meiotic analysis of these hybrids, have led him to postulate:
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