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84 BENJAMIN CLAEKE, F.L.S.
Potamo^eton lucens h. Hafnarfjortlir (Solander). Likely enough
confused with rufescp.ns as often done now.—P. crispus L. Myvatn
(Glieraan). Pond above the hot springs at Langarness (Lindsey).
Dlysmus compressus Panz., and B. rufus Link. Hop (Baring-
Gould j.
Scirpits lacustris L. Eeykjavik (Baring-Gould). Esia (Morck).
Eriojihorum latifolium Hoppe, Eecorded by three authors.
Care.v pulicaris L., C. areaaria L., C. vulpina, L., C. muricataTi.,
C. loliacea L., C. elonrjata L., C. pallescens L. These records are in
some cases pointed out as errors by Drejer in his Revisio Car.
boreal. (' . fulujinosa Sternb. Konig. G. flava L., and C. vesicaria
L. " In all the hsts " (Babington, /. c).
Milium ejfusum L. Near Kaldrauanes (Mohr).
Psamma arenaria Beau v. Near Kinntestadt (Thieneman and
Giinther).
Calaniagrostis Epigejos Roth. (Lindsey). C. varia Vahl (Vahl).
Aira atropurpurea Wahl. (Hornemann). A. prcecox L. Several
authors.
MoHnia carulea Moench. Havn Ledelos (Mohr). Eydar on the
Lagarfljot.
Poa flexuosa Wahl. (Vahl). P. compressa L. Many of the lists.
Dactt/lis glomerata L. In many lists.
Festuca arundinacea Schr. In many lists.
Triticum caninum L. In many lists.
Equisetum sylvaticum L. Copse near Langarvatn (Bai'ing-
Gould).
Isoetes lacustris L. Thinvellir-vatn (Hooker).
Lycopodium clavatum L., L. complanatum L. In some lists.
Polypodiiim alpestre Hoppe. Stad under Snasfell. Steenstrup.
Lastrea Thelypteris Presl. " In all the lists " (Babington, I, c).
AspleniiC7n fontanuni Presl. Thingvellir (Baring- Gould).
BENJAMIN CLARKE, F.L.S.
Benjamin Clarke was born Sept. 5th, 1813, at Saffron Walden.
He was articled to Dr. Mayo, of Winchester, and regularly entered
the medical profession, but never practised except for a few
months on' one or two occasions. In fact, even while a student in
hospital, he had become devoted to the study of Natural History,
especially of Botany ; and his researches formed the main occupation
of his life. The Royal Society's Catalogue attributes to him
nineteen papers, of which three appeared in this Journal for 1865.
Two more recent contributions from his pen in this Journal for
1886 and 1887 will be found. These papers treat of very varied
subjects ; but a majority of them lead up to his principal separate
work, ' The Natural System of Botany.' In his early days he
attempted to fix the position of various orders and genera, of which
the^affinities were not settled, by ascertaining the position of the
carpels with reference to the axis and the position of the raphe