360 - HORTUS MORTOLENSIS 
A. Haynaldi. ; 
Was received in May, 1897, from Dr. H. Ross, then Acting 
Director of the Botanic Garden, Palermo. It flowered from 
November, 1910, till March, 1911. 
A, Henriquesii. 
Was received in March, 1891, from Prof. Henriques, Director 
of the Botanic Garden, Coimbra, and from Messrs. Haage & 
Schmidt, of Erfurt. It flowered for the first time in the summer 
of 1905. 
A. ingens (nom. noy.). 
The variegated form of this species was described by Prince 
Salm-Dyck in 1859 as A. picta. He states that it was introduced 
into the Jardin des Plantes, Paris, and that its normal type was 
unknown to him. This variegated plant is now very common in 
all gardens, and has often been confused with variegated forms of 
A. americana, from which it is however readily distinguished by 
its slender end-spine and differently shaped marginal prickles. 
The normal green type of the species was first discovered by 
the author on rocks at La Mortola, where it had grown from seeds 
of the variegated form.* We have since sown seeds of the varie- 
gated form, and the seedlings were invariably of the green type. 
As Salm’s name A. picta can only be referred to the variegated 
form, the green type had to be named. 
Whether A. Milleri of Salm and other authors has anything to 
do with it I do not know. A. Milleri Haworth (=A. virginia 
Mill. Dict. ed. 8, n. 2), however, cannot be the above, as it is said 
to be “‘scapo simplicissimo,” nor can A. ingens be identified with 
A. americana L. 
A, Karwinskii. 
The history and intricate synonymy of this species have been 
cleared up by Prof. Trelease. When old it forms a stem, along 
which the leaves are disposed in an elongated rosette; the plant 
thus resembles, from a distance, a Yucca rather than an Agave. 
The Mortola plant was brought from the Botanic Garden, Palermo, 
in January, 1901. 
A, Knightiana. 
This plant is generally grown as A. geminiflora, and has also 
been figured as such by Lindley in Bot. Register (1828) t. 1145. 
Mr. Drummond, of Kew, has pointed out + that Lindley’s text does 
not correspond with his plate, and that the latter represents an 
undescribed species, to which he gave the above name. It differs 
chiefly from A. geminiflora by having the leaves without any 
fibres along the margin. I have, however, no experience yet as 
to the validity of this character and the amount of variation of it 
in A. geminiflora and A. Knightiana. 
* See my note and figures in Gartenwelt, 1904, p. 337. 
+ In Bot. Mag. ander plate 8271. 
