INDEX FILICUM : oor 
is from four to six feet, but many are over seven and eight, and one 
measures eleven feet. It seems to grow equally well in san 
clay. It is a curious fact that, although seedlings from Lytchett 
have been planted in many places i in the neighbourh , and have 
grown, none have as yet seeded, even on similar soil, within a few 
miles. The original plant lived about twenty-five years.’”” H. lusi- 
tanica is not mentioned in the Flora of Dorset, nor in Mr. Dunn’s 
Alien Flora, of which we learn that a new edition is in the press. 
NOTICES OF BOOKS. 
Index ee sive ners est? generum specierumque Filicum 
t Hydropteridum ab anno 1753 ad annum 1905 descriptorum 
audjecs synonymis pr Faipalibs, area geographica ete. y CARL 
Curistensen. Copenhagen: Hagerup. Fase. I. May, 1905. 
64 pp. Price 3s. 6d. 
nce the abrupt termination of Thomas Moore's Index Filicum 
ies 62), which was never carried ae the beginning of the letter G, 
no attempt until now has been made to publish a complete index of 
all known ferns with their seit ite Yet the want of such a book 
drance an i 
the production of a complete Synopsis ner up to ‘ate we need 
for ferns those facilities of reference which are afforded by the Index 
pct for flowering plants, or by Paris’s Index Bryologicus for 
And this is what Herr Christensen offers us in his new 
Fadew Filicum, the second fascicle of which is due to be published. 
The complete work will consist of three sections :—I. A systematic 
enumeration of the genera, based on the system of Engler and 
Prantl. II. An alphabetical Cpe be of the species and syno- 
nyms published between 1753 1905, including garden names. 
Til. An alphabetical catalogue of li literature “ een en n new genera and 
Fee oe described or examined.” _The author vie m engaged 
of 80,000 species ‘ond synonyms, The itiog pleads that intending 
subscribers to, and purchasers of, the work will send in their names 
‘as soon as pomitbias for, as he informs me in a letter, he finds the 
printing to be so costly ea unless he can obtain at least 200 sub- 
