40 OBSERVATIONS ON HOLL’S LIST. 
and with the fruit still young, were for some time mistaken 
also by me for the true Rhamnus integrifolius, DC., till more 
perfect individuals enabled me to ascertain their true nature 
beyond all question or possibility of doubt. And it is very 
probable that I gave some of these, with the above erroneous 
name, to Mr. Holl, which occasioned his mistake. The true 
R. integrifolius certainly does not occur in Madera. 
** Dolichos lignosus, Linn.," is quite confined to gardens. 
“ Lotus odoratus, Schousb.,” may be either Dorychnium par- 
viflorum, DC., Lotus diffusus, Sol., or Lotus divaricatus, Sol. 
MSS.; all three common species, not otherwise enumerated 
by Mr. Holl. 
** Cactus Opuntia, Linn." The Madera Cactus is certainly 
Opuntia Tuna (Mill) DC.; and neither the O. vulgaris 
(Mill.) DC., (Cactus Opuntia, L.), nor O. Ficus indica, 
(Haw.) DC., (Cactus Ficus indica, L.); both which have yellow, | | 
not dull reddish-orange flowers, and no long spines, besides 
other differences. It is singular that almost every writer, 
whether botanist or not, should have called the Madera plant 
either Cactus Opuntia or C. Ficus indica, when it is so very. 
distinct from both, and so clearly the ** Tuna major, spinis — 
validis flavicantibus, flore gilvo” of Dillenius in his Hort, El- — 
tham. p. 396. t. 295. f. 380.; and also the Cactus Bonplandii, 
Kunth, Nov. Gen. VI. p. 69. I scarcely understand what | 
Mr. Höll means by **a gum similar to the 7ragacanth exud- — 
ing from the old leaves.” I have occasionally seen gum on 4 I 
the stems, but in very small quantities; nor does it appear a 
possessed of any peculiar qualities whatever. 
* Chenopodium ambrosioides, Linn." is an universal weed. 
s Amaranthus strictus, W.” It should have been noticed, — 
that being unable to consult Willdenow’s Monograph of the 
genus, I am not quite sure whether my plant may not prove E] 
rather a state of A. retrofferus, W. 
“* Alchemilla vulgaris, Linn." This is unquestionably a E] 
slip of the pen for Alchemilla arvensis, Lam. (Aphanes arven- 
sis, L.), very common on the mountains. 
As to Roses, though the gardens of Madera cannot certainly : 
ADU US 
