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TITE JOURNAL OF BOTANY 
lateriflora. Sieber collected A. leptophyllum in New South AVales 
in 1823 (12); and it is now a common weed in Eastern Australia (13), 
whence it has been introduced in wool to Europe. In 1826 Cliainisso 
and Schlechtendal (11) recorded it from Chile, Brazil, and Santo 
Domingo under the name Sison Am mi. Jts occurrence in Hungary 
and Poland in the early part of the nineteenth century is attested by 
a specimen sent by Prof. Jan of Parma to J. Gay in May 1828 as 
Pimpinell a dicliotoma (Herb. Kew.), this being the only record from 
these countries. It re-appeared in Italy in 1829, in cultivated 
ground on a mountain near Naples, where it seems to have been 
discovered by Gussone (15), and was identiiied by Tenore (16) as 
Si son Ammi. Thus by the end of the year 1829 A. leptophyllum 
had been recorded under three different names: as Sison Ammi in the 
Vienna Botanic Garden, near Pisa and Naples, and in Chile, Brazil, and 
Santo Domingo; as Pimpinell a leptophylla (Atithusa leptopliylla) 
from Santo Domingo and Louisiana ; and as P. lateriflora in the 
Berlin Botanic Garden. 
A. P. De Candolle (17) pointed out in 1830 that P. leptophylla 
and P. lateriflora were conspecific, and gave a clear account of the 
synonymy and geographical distribution of the species under the 
name llelosciadium leptophyllum. He was, however, unaware of 
Savi’s and Tenore’s Italian records under Sison Ammi and Seseli 
Ammi ; and was in doubt as to whether II. leptophyllum was iden¬ 
tical with Sison Ammi L. or not. In 1837 Bertoloni (18) recog¬ 
nized that the species found at Pisa and Naples differed from Sison 
Ammi L. as described by Smith (19). He pointed out that it agreed 
in all respects with the description of llelosciadium leptophyllum I)C. 
But as Bertoloni, like Savi and Tenore, regarded it as indigenous in 
Italy, he did not venture to identify it with II. leptophyllum , which 
is a native of America ; having matched it with plants raised in the 
Botanic Garden, Bologna, from seeds of Pimpinell a lateriflora Link 
received from Berlin, he gave it the name Sison lateriflorum. 
Apium leptophyllum has apparently disappeared from Tuscany 
and Campania (15, 20), but was recorded in 1897 from Liguria (21). 
It was noted as having been found in Gorz by Fleischmann (22) at 
Monfalcone and between Vipacco and Aiclussina (Wippach and 
Heidenschaft) between 1819 and 1842. It soon disappeared, how¬ 
ever; Tommasini failed to find it (23), and suggested (24) that 
Fleischmann had obtained his specimens from the Botanic Garden, 
Laibach, where he was employed as a gardener; Tommasini stated 
that a specimen of A. leptophyllum in the Herbarium of Hladnik, 
founder and former director of the Laibach Botanic Garden, was 
labelled “ Planta Americae meridionalis, spontanea in horto botanico 
labacensi.” According to Nyman (25), the species distributed under 
Apium leptophyllum in Reichenbach FI. Germ. Exsicc. no. 2215 was 
Ptychotis Ammoides Koch, but the specimen under that number in 
the Kew Herbarium is A. leptophyllum. Possibly Fleischmann may 
have collected P. Ammoides at Monfalcone and between Vipacco 
and Aidussina, and supplemented his material with specimens of 
A. leptophyllum from the Botanic Garden, Laibach; he did not 
include P. Ammoides in his flora. According to Pospichal (26) 
