66 THE NEW ‘INDEX OF PLANT-NAMES.’ 
I think the life- history of the plant is not yet ai ‘ren 
Jouve considers it a good _, ugpliaiae a hybrid.” de, l. c. 
I had one to obtain last summer a supply ‘of ee ood fing 
t 
fe rare ; pe France. Milde also reco ar it from North 
America, whence I have seen specimens from the shores of Lake 
i b 
t 
The principal synonyms given by Milde (Monog. Equisetorum, 
p. 857) ar 
EQUuISETUM LITORALE Kihlewein ap. Bupeesbt, Beitriige zur 
Pflanzenkunde des russ. Reiches. iv. p. 9 (1845). 
E. inundatum Lasch ap. Rabenhorst, Bot. Centralblatt, 2, p. 25 
1846). 
E. arvense ¢. inundatum Rabenhorst, Crypt. Fl. von Deutschland, 
i. p. 888 (1848). 
Fi, Kochianum G. Béckel, Aucshaine und Beschreib. aller in 
ee ete., crypt. Gen. p 
na-limosun Lasch. Maat. Geiine, P. 505 (1857). 
rvense mpestre Opiz, and E. arvense f. serotina Cela- 
kovsky i = Lotos, - ‘236 (1862), 
E. ma m Celak. l.c. sup. p. 229 (1862). 
arvense re " Halen P. Ascherson in Fl. der Prov. Branden- 
burg, p- 901 (1864), 
ESCRIPTION OF PLATE 273.—1. Equisetum Seles from a Surrey specimen. 
-2. Transverse section of stem of same. 3. Ditto of E. limosum. 4. Ditto of 
E. palustre. (2, 3, and 4 reduced from the enlarged sections figured in Milde’s 
‘Monog. Equis.,’ Plates XIII., XY., and XVIL.). 
THE NEW ‘INDEX OF PLANT-NAMBS.’ 
By B. Daypon Jackson, Sec. L.S. 
Tae close of the fifth year’s work on the new Index of Phane- 
rogams seems a fit oppo rtunity of stating the present condition and 
prospects of the fe itor together “with a short history of its 
career. This will serve to answer many enquiries as to its 
progress, and steals to inform many unspoken speculations 
—— 
aim has been to construct a list of genera and species upon 
the ‘ piteon Plantarum ’ of Mr. Bentham and Sir Joseph Hooker, 
