WILSON’S OBSERVATIONS, 269 
outer calyx. Seed compressed, the margin fringed with 
Spinule, as well as the three bristles at the top ; of which 
the two outer ones possess three rows of spinule ; the middle 
bristle two rows only. 
46. Bidens cernua. September 4, 1826. Bracteas edged 
with spinulz, as in the last, but less distinctly so. Fruit 
compressed, with 4 angles, thickened upwards, the angles 
fringed with deflexed spinule. The two lateral bristles at 
the crown, with three rows of spinulz, the other bristle with 
two rows only. 
47. Gnaphalium supinum. Ben Lawers, July 17, 1827. 
Root fibrous, not black, branched at the crown, and bearing 
several stems. ; 
48. Tussilago Farfara. April 28, 1827. In this species 
the common calyx appears to be simple, though in 7. 
Petasites the scales are in two rows. Seed down rough with 
ascending spinulze. 
The central tubular florets barren,those of the circumference, 
generally fertile. Embryo straight, with two oblong cotyle- 
dons. Stigma of the central florets short and thick, never 
projecting beyond the anthers, but often appearing below 
them. It sometimes is found with several florets on the 
same common stalk. 
49. Tussilago Petasites. April 10, 1827. Near War- 
rington. Gen. Char. Common calyx imbricate in two rows, 
scales rather lanceolate than linear.— The ** tumid foot-stalks" 
on the lower part of the flower-stalk are dilated, almost mem- 
branous, bracteas. Both the varieties are frequent near. 
Warrington, generally growing in company. T. hybrida in 
Such cases generally more abundant than the other. In 7. 
hybrida, the florets of the circumference are irregularly 
5-cleft, the stigma for the most part 3-cleft. Specimens with 
Perfectly formed seeds were gathered in May 1827. The 
florets of the ray are always fertile, in many cases I observed 
the whole of the florets, except two or three of the central 
ones to have ripened their seeds. 
50. Tussilago hybrida. Without attempting to controvert 
