Paper, 'On Isoëtes lacustris, Linn' by John Bretland Farmer

Description

Farmer writes: 'The genus Isoëtes has been an object of interest to botanists ever since Hofmeister’s brilliant researches on the vascular cryptogams, but the accounts given by the different observers on the development and organogeny of the sporophyte are so conflicting, and moreover our knowledge of the sexual generation is so limited, that a renewed investigation of the whole subject seems desirable. In the present communication I propose to summarise, as briefly as possible, the more important of my own observations on one species, I. lacustris, to which plant my attention has been directed for some time past. I intend to deal here only with the germination of the macrospore, and to reserve details of minor significance, as well as all account of the sporophyte, for treatment in a future paper, as this part of the subject requires critical discussion.'

Annotations in pencil and ink.

Subject: Biology / Botany

Received 22 January 1889. Read 31 January 1889.

A version of this paper was published in volume 45 of the Proceedings of the Royal Society as 'On Isoëtes lacustris, linn'.

Reference number

PP/13/12

Earliest possible date

1889

Physical description

Ink and graphite pencil on paper

Page extent

5 pages

Format

Manuscript