71 
corresponding specimens, Sieber discovered his error, and the 
printed labels issued with the plant from Gethsemane bore the 
name Croton oblongifolium. This was a new inadvertence, 
because C. oblongifolium, Del. does not occur in Palestine. But 
the use of the name C. oblongifolium, Sieb. (1821) non Del, 
(1812), is the first recognition of this plant as a distinct form, 
In 1824 appeared the brief but important summary by the 
younger Jussieu (Huphorb. Gen. Tent. pp. 27, 28, t. 7, fig. 
25/1-11). This revindicated the generic status of Chrozophora 
but in so doing it only transferred by name the Tournesol itself, 
in connection with his plate, to Necker’s genus. Jussieu cited, as 
illustrating the genus, the various species of Croton which he 
believed to belong to Chrozophora, but left to those who might 
follow him the task of deciding what names these species ought to 
bear under Chrozophora. After defining the genus, Jussieu 
remarked.—Species circiter 8, duae senegalenses, caeterae ex 
Arabia aut Africa boreali quarum duae in Europa australi 
erescunt; inter quas scilicet Croton tinctorium, Linn.; C. 
obliquum, Vahl; C. plicatum, Vahl; C. verbascifolium, Willd. ; 
C. oblongifolium, Delile; C. senegalense, Lamk. Quibus ex 
descriptione forsan congeneres C, mollissimus, Geis. et C. Rott- 
leri, Geis., alter sinensis, alter indica. 
These carefully weighed statements of A. Jussieu can only be 
fully appreciated if the specimens in the Jussieu herbarium be 
examined. These specimens are arranged under seven consecutive 
numbers, 16262-16268. 
Herb. Jussieu 16262 includes two specimens, ‘ Adanson n. 165’ 
and ‘ Herb. de Galam 61.’ The two belong to the same form. The 
one marked ‘ Adanson n. 165’ is by citation the type of Croton 
senegalense, Lamk; it has been written up by Lamarck himself 
as ‘ Croton senegalense, Lamk encycl.’ and as been further 
inscribed by A. L. Jussieu (but not by A. Jussieu) as ‘ Crozophora 
senegalensis Ad. J. Euph. 28,’ although the entry on the page 
cited really is ‘ Croton senegalense, Lamk.’ 
Herb. Jussieu 16263 includes two specimens of Croton tine- 
torium, Linn., neither of them localised and neither with a 
collector’s name. 
Herb, Jussieu 16264 consists of one specimen only, without 
locality or collector’s name. Its chief interest is that it has been 
written up by Vahl, when he examined the Jussieu herbarium, as 
‘Croton obliquum.’ ‘The specimen is exactly like the one at 
Copenhagen which was named Croton argenteum by Forskal, and 
was later made the type of Croton obliquum, Vahl (1790). 
Herb. Jussieu 16265 consists of one specimen only, which is 
interesting because neither A. L. Jussieu nor A. Jussieu, nor 
Lamarck nor Vahl when they examined the herbarium, ventured 
to name it. It originally belonged to Danty d’Isnard, who wrote 
it up as ‘ Ricinoides memphiticus folio laevi, Lippi.’ As has 
already been explained, a later note in an unknown handwriting 
has explained that it cannot be the plant Lippi had in mind. The 
specimen is one of Croton oblongifolium, Del. : 
Herb. Jussieu 16266 consists of one specimen, collected in 
Senegal by Adanson, whose note is :—‘ Herb. de Galam 60.’ This 
