42 OBSERVATIONS ON HOLL’S LIST. 
by Mr. Holl, which he gathered **at a little spring near the 
top of Pico Ruivo.” The plant is extremely abundant every- 
where, above an elevation of 3000 or 4000 feet. 
* Hesperis diffusa, Banks.” It is scarcely necessary to ob- 
serve that this is Sinapidendron frutescens, nob.in Camb. Trans, 
(Sinapis frutescens, Ait.) 
‘ Sinapis arvensis, Linn." The very common Sinapis in 
corn-fields is S. incana, L.—S, arvensis, L., I have not seen 
here. 
** Fumaria capreolata, L.," and * F. officinalis, L.” I have 
never found the latter. | 
** Viola odorata, Linn." This must be V. Maderensis, nob. 
in Camb, Trans. 
* Nigella sativa, Linn." This is clearly a mistake for N. 
Damascena. ae 
* Ranunculus arvensis, Linn." Never found by me. Pos- 
sibly R. muricatus, L. is intended, which is very common by 
streams and in moist places by road-sides. 
* Ruta graveolens, L? The very common wild Madera. 
Rue is decidedly R. angustifolia (Pers.) DC., which is indeed. 
also R. graveolens, u. L., according to De Candolle; thong 
not the plant now generally known by the name of R. graveo- 
lens, L., which is the common (broad-leaved) Rue of English 
gardens; a plant I have never seen in Madera, even in yk 
tivation. 
— * Malva subhastata, Cav.” Iwill not venture a conjecture 
what this stands for: and I also suspect that Mr. Holl's other 
species, ** M. rotundifolia, Linn.," is incorrectly named. — - 
* Sida rhombifolia, Linn.,” is doubtless, S. Maderensis, nob, 
in Camb. Phil. Soc. Trans. 
* Sida Abutilon, Linn." Mr. Höll did not see his plant in 
flower; and I therefore think S. populifolia, Cav., must be what 
7 x intended. 
-* Geranium Robertianum, Linn.” The Madera plant is G. 
purpureum, Vill. (G. Robertianum, 8. Sm., DC., &c.) 
: “ Erodium cicutarium, Sm." A very nearly allied species 
or perhaps "ire a variety of E. cicutarium, Sma does inde 
