genera, and his Hortus Ciiffortianus (1738), dealing with 
the species, have the same close association as the 1754 
Genera Plantarum has with the 1758 Species Plantarum. 
Thus, his principal reference under Cannabis in the 17538 
Species Plantarum is to the Hortus Cliffortianus 457, 
which, in turn, refers to the 1737 Genera Plantarum 
no. 749. 
Inthe Hortus Cliffortianus, Linnaeus provided a short 
diagnosis, Cannabis folis digitatis, to distinguish the true 
hemp from a then imperfectly known plant diagnosed 
there as Cannabis folis pinnatis, but named Datisca can- 
nabina in the first edition of the Species Plantarum. In 
short, Linnaeus’s concept of Cannabis sativa in 1758 is 
identical with that of his Cannabis folis digitatis of 17388. 
Just as John Ray had earlier distinguished functionally 
male individuals as Cannabis sativa ‘mas s. sterilis’ and 
female individuals as Cannabis sativa ‘foemina s. fertilis’, 
so Linnaeus likewise distinguished male and female in- 
dividuals, allocating pre-Linnaean synonyms to each. 
The material of Cannabis which Linnaeus had for study 
when preparing the Genera Plantarum (17387) and Hor- 
tus Chffortianus (1738) is fortunately represented in the 
Clifford Herbarium, Hortus siccus Cliffortianus, in the 
Department of Botany, British Museum (Natural His- 
tory), London, by two good specimens, one (A) male 
(Plate X XIX), the other (B) female (Plate XXX). 
Kither is available for designation as lectotype. Since, 
however, the major characters for taxonomic division in 
Cannabis come from fruiting material, the Hortus sic- 
cus Cliffortianus fruiting specimen (p. 457 Cannabis no. 
1, B) of Cannabis sativa L. is here designated as the 
lectotype. This specimen represents C. sativa as currently 
commonly accepted. The fruit is about 5 mm. long, 8.5 
mm. broad. 
If Linnaeus had provided in 1758 a new diagnosis for 
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